Answer:
hi there
1. 9x - 3y = 3
6xy = 3
xy = 3/6
xy = 2
Step-by-step explanation:
hope u understand
-18= 5-(6k - 19) i have the answer but i need help on how to get the answer 7?
Answer:
k = 7
Step-by-step explanation:
Step 1: Write equation
-18 = 5 - (6k - 19)
Step 2: Solve for k
Distribute negative: -18 = 5 - 6k + 19
Combine like terms: -18 = -6k + 24
Subtract 24 on both sides: -42 = -6k
Divide both sides by -6: k = 7
Step 3: Check
Plug in k to verify it's a solution.
-18 = 5 - (6(7) - 19)
-18 = 5 - (42 - 19)
-18 = 5 - 23
-18 = -18
As an object falls through Earth's atmosphere, which of the following statements correctly describes the energy change (assume no friction or drag)
a. The potential energy of the object decreases while the thermal energy increases
b. The kinetic energy of the object increases while the elastic energy increases
c. The potential energy of the object decreases while the kinetic energy increases(THIS ANSWER IS CORRECT)
d. The thermal energy of the object decreases while the kinetic energy increases
Answer:
(c) The potential energy of the object decreases while the kinetic energy increases.
Step-by-step explanation:
Given that, an object falls through Earth's atmosphere.
As there is no friction of drag, this is the case of free fall.
So, there is no restriction in the motion of the object due to the air molecule. i.e there is no rubbing of air molecule with the object, so there is no possibility of heat (thermal energy) generation. So, the thermal energy of the object remains constant. So, options (a) and (d) are incorrect.
The only force that acts on the body is the gravitational force, as there is no drag. This force causes only the acceleration of the body. The shape of the body remains unaffected. So, there is no strain in the body. Hence, the elastic energy of the body is zero and there is no change in it. Option (b) is also incorrect.
Now, due to gravitational force, the object falls towards the earth, and its velocity increases. As the object moves towards the center of the Earth, so, the distance between the center of the earth and the object is decreases, which leads to a decrease in the potential energy of the object (as the potential energy of any object due to another body is directly proportional to the distance between the center of both the body).
While, the velocity of the object increases, so the kinetic energy of the object increases (as the kinetic energy of any object of directly proportional to the square of the velocity of the object).
Hence, the potential energy of the object decreases while the kinetic energy increases.
Therefore, option (c) is correct.
Answer:
C) The potential energy of the object decreases while the kinetic energy increases.
A farmer has 5 cartons of eggs for sale. Each carton contains 12 eggs.
if 5/6 of the eggs are brown, what is the total number of eggs that are not brown
Answer:
10 eggs
Step-by-step explanation:
5 cartons multiplied by 12 eggs each equals 60 eggs in total.
Therefore 5/6 would be equal to 50/60 since we multiply the denominator and numerator by 10
As a result 10 of the eggs are not brown
The total length of wires a b and c is 445 cm wire a is 45 cm longer then wire b and wire b is half as long as wire c how long is wire a
Answer:
[tex]a = 145\ cm[/tex]
Step-by-step explanation:
Given
[tex]a + b + c = 445[/tex]
[tex]a = 45 + b[/tex]
[tex]b = \frac{1}{2}c[/tex]
Required
Determine the length of a
Solve for c in [tex]b = \frac{1}{2}c[/tex]
[tex]2 * b = \frac{1}{2}c * 2[/tex]
[tex]2b = c[/tex]
[tex]c = 2b[/tex]
Substitute [tex]c = 2b[/tex] and [tex]a = 45 + b[/tex] in [tex]a + b + c = 445[/tex]
[tex]a + b + c = 445[/tex]
[tex]45 + b + b + 2b = 445[/tex]
[tex]45 + 4b = 445[/tex]
Solve for 4b
[tex]4b = 445 - 45[/tex]
[tex]4b = 400[/tex]
Solve for b
[tex]b = 400/4[/tex]
[tex]b = 100[/tex]
Recall that: [tex]a = 45 + b[/tex]
[tex]a=45+100[/tex]
[tex]a = 145\ cm[/tex]
Which of the following represents a true statement?
A. 19^21 x 19^3 = 19^63
B. (24^8)^5 = 24^40
C. 20^1 x 20^0 = 20^0
D. 16^40 / 16^20 = 16^2
(LOOK AT THE PICTURE PLEASE)
When you raise an exponential expression to another exponent, you multiply the exponents. We have 8*5 = 40 as the final exponent. The rule is (x^y)^z = x^(y*z). The base stays the same.
Statement A is not true because we should be adding the exponents. The rule is x^y*x^z = x^(y+z). Note how the bases are all the same. We'll use this rule for statement C to show that it is also false.
A similar rule is (x^y)/(x^z) = x^(y-z). We subtract the exponents this time. This rule is used to show that statement D is false.
nine times a number y subtracted from 85 is seven times the sum of four and y
Answer:
85-9y= 7(4+y)
solve for y if you need to simplify
A bag of popcorn contains 483 calories and serves 3.5 people. How many calories are in each serving?
Answer:
U simply multiply 483 by 3.5
=1690.5
Step-by-step explanation:
Company earns S dollars by selling y items per week. According to the equation S(y)=−2y^2+60y+10, how many items does company need to sell to maximize earnings.
Answer:
[tex]Max = 15[/tex]
Step-by-step explanation:
Given
[tex]s(y) = -2y^2 + 60y + 10[/tex]
Required
Determine number of items that gives maximum earnings;
The general form of a quadratic equation is:
[tex]s(y) = ay^2 + by + c[/tex]
And the maximum is calculated as:
[tex]Max = \frac{-b}{2a}[/tex] If a<0
Comparing [tex]s(y) = ay^2 + by + c[/tex] to [tex]s(y) = -2y^2 + 60y + 10[/tex]
We have that:
[tex]a = -2[/tex] [tex]b = 60[/tex] [tex]c = 10[/tex]
Substitute these values to
[tex]Max = \frac{-b}{2a}[/tex]
[tex]Max = \frac{-60}{2 * -2}[/tex]
[tex]Max = \frac{-60}{-4}[/tex]
[tex]Max = 15[/tex]
The number of item that maximizes the function is when y = 15
Simplify 3√6 − 10√2 ⋅ √3
−13√6
−13√2
−7√6
−7√3
Answer:
4
Step-by-step explanation:
Answer:
-7√6Step-by-step explanation:
Simplify 3√6 − 10√2 ⋅ √3
3√6 − 10√2 ⋅ √3=3√6 - 10√6 =(3-10)√6 =-7√6Solve the absolute value equation. If no solution write NO SOLUTION.
-{2x + 3] + 8
12
Answer:
If problem is "-|2x+3|+8=12"
then there is (no solution.)
Step-by-step explanation:
Let's solve your equation step-by-step.
−|2x+3|+8=12
Step 1: Add -8 to both sides.
−|2x+3|+8+−8=12+−8
−|2x+3|=4
Step 2: Divide both sides by -1.
−|2x+3|=4
-1 -1
|2x+3|=−4
Step 3: Solve Absolute Value.
|2x+3|=−4
No solutions Because absolute value is less than 0.
How to solve?
-7k-4K=8-2k-8k
Answer:
-7k-4K=8-2k-8k
-11K = 8-10K (combine like terms)
8 = -11k+10k (move the -10 to combine like term with -11)
8 = -1k
k = 8/-1 (isolate the k to find its value by dividing the 8)
k = -8
THIS IS DUE SOON!!! Multiple-step equation. Please help ASAP.
what are the steps to finding the distance between two points on a coordinate grid using pythagorean theorem
Answer:
Derived from the Pythagorean Theorem, the distance formula is used to find the distance between two points in the plane. The Pythagorean Theorem, a2+b2=c2 a 2 + b 2 = c 2 , is based on a right triangle where a and b are the lengths of the legs adjacent to the right angle, and c is the length of the hypotenuse.
Step-by-step explanation:
Answer:
Derived from the Pythagorean Theorem, the distance formula is used to find the distance between two points in the plane. The Pythagorean Theorem, a2+b2=c2 a 2 + b 2 = c 2 , is based on a right triangle where a and b are the lengths of the legs adjacent to the right angle, and c is the length of the hypotenuse.
Step-by-step explanation:
.. help. ...................
Answer:
10
Step-by-step explanation:
Amy spent $6.00 for 2 gallons of gas. Bobby paid $15.00 for 6 gallons of gas. Carlos paid $32.00 for 8 gallons of gas. List the people in order of how much they paid for one gallon of gas, from the cheapest to the most expensive cost per gallon.
Answer:From cheapest to most expensive: Bobby, Amy, Carlos
-Hope this helped!
Step-by-step explanation:
Amy pays $3. 6/2=3
Bobby pays $2.50. 15/6=2.5
Carlos pays $4. 32/8=4
What is the sun of the equation 9 + 9+9
The graph shows the costs of two types of fruit at a store. A graph measuring cost and amount. Two lines, labeled Cherries and Apples, exit the origin to show that cost increases as amount increases Drag and drop the appropriate symbol to the box to compare the rates of the fruits. cost of apples per lb Response area cost of cherries per lb
The cost of apples per lb is less than cost of cherries per lb.
What is the general equation of a Straight line?The general equation of a straight line is -
[y] = [m]x + [c]
where -
[m] → is slope of line which tells the unit rate of change of [y] with respect to [x].
[c] → is the y - intercept i.e. the point where the graph cuts the [y] axis.
We have the graph shows the costs of two types of fruit at a store. Two lines, labeled Cherries and Apples, exit the origin to show that cost increases as amount increases.
Slope of the line representing apples is smaller than slope of the line representing cherries. This means that the unit rate for cherries is greater than that of apples. So, cost of apples per lb is less than cost of cherries per lb.
Therefore, the cost of apples per lb is less than cost of cherries per lb.
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A moderately active 140 pound person will use 2100 calories per day to maintain that body weight, how many calories per day are necessary to maintain a moderately active 145 pound person
Answer:
2,175 calories
Step-by-step explanation:
140 pound person will use 2100 calories per day
145 pounds person will use x calories per day
Find x
Pounds : calories
140 : 2100 = 145 : x
140/2100 = 145/x
Cross product
140 * x = 2100 * 145
140x = 304,500
Divide both sides by 140
x = 304,500 / 140
= 2,175
Therefore,
145 pounds person will use 2175 calories per day
How does one find the inverse function of f(x)= [tex]\frac{1}{3x-1}[/tex]
Answer:
[tex]\displaystyle f^{-1}(x)=\frac{1+x}{3x}[/tex]
Step-by-step explanation:
The Inverse of a Function
The procedure to find the inverse of the function is:
* Write the function as a two-variable equation:
[tex]\displaystyle y=\frac{1}{3x-1}[/tex]
* Solve the equation for x.
Multiply by 3x-1
[tex]y(3x-1)=1[/tex]
Divide by y:
[tex]\displaystyle 3x-1=\frac{1}{y}[/tex]
Sum 1:
[tex]\displaystyle 3x=\frac{1}{y}+1[/tex]
Operate the right side:
[tex]\displaystyle 3x=\frac{1+y}{y}[/tex]
Divide by 3:
[tex]\displaystyle x=\frac{1+y}{3y}[/tex]
* Swap the variables:
[tex]\displaystyle y=\frac{1+x}{3x}[/tex]
Write back into function form:
[tex]\boxed{\displaystyle f^{-1}(x)=\frac{1+x}{3x}}[/tex]
Triangle ABC was translated to form triangle A'B'C'. Which describes the transformation? Check all that apply.
A.
It is non rigid
B.
The size is preserved
C.
It is rigid
D.
The angles are not preserved
E.
It is isometric
Answer:
B, C, E
Step-by-step explanation:
Translation is a rigid transformation. As such, it preserves sizes and angles. "Isometric" is another way to say "the size is preserved."
(01.05 MC)Taylor bought 6 tickets to a movie. The price of each ticket was
the same. After he bought the tickets, his account balance showed a change
of -$68.04. What would have been the change to Taylor's account balance
had he only bought 1 ticket to the movie?
Answer:
-$11.34
Step-by-step explanation:
Each of these tickets have been said to have the same costs of buying them.
If 6 tickets = -68.04 dollars
1 ticket = ?
We cross multiply to get the unknown
6 x ? = 1 x -68.04
Such that
? = -68.04/6
= -$11.34
So in conclusion if Taylor had not bought these 6 tickets and had only gotten 1 for the movie, the change to his account balance would be $-11.34
b) 4 meter 20 centimeter to cm
Answer:
4 meters and 20 centimeters will be 420 centimeters
Step-by-step explanation:
Answer:
420 (cm)
Step-by-step explanation:
1 meter = 100 centimeters.
so,
4 meters = 400 centimeters
400 + 20 equals 420cm
What is the simplified expression for the expression below? 4(x + 8) + 5(x - 3) 09x + 5 O 9x + 11 09x + 17 o 9x + 47
Answer:
[tex]45x^2+198xo+978x+79[/tex]
Step-by-step explanation:
I start my grouping the like terms.[tex]=45x^2+45xo+153xo+4x-135x+1109x+32+47[/tex]
Then, I add the similar elements.
[tex]4x-135x+1109x=978x[/tex]
[tex]=45x^2+198xo+978x+32+47[/tex]
Finally, I added the numbers up.
[tex]=45x^2+198xo+978x+79[/tex]
Please answer this correctly without making mistakes my homework is due today I have to finish this as soon as possible I want genius expert and ace people to answer this correctly without making mistakes
Answer:
18 practices
Step-by-step explanation:
9.63 / 9 = 1.07
19.26 - 1.07 = 18
How many solutions are there to the equation
8x - 7 = 2 (2x + 7) - 5
Answer:
x=4
Step-by-step explanation:
8x - 7 =2(2x +7) - 5
8x - 7 =4x +14 - 5
8x - 7 =4x +9
8x - 4x =9 +7
4x =16
x=16 :4
x=4
Some atomic processes can result in the emission of an electron from the atom. Electrons emitted in this way can have discrete values of kinetic energy, which depend on the atomic energy levels. The probability that the electron has a particular value depends on interacions within the atom. Suppose a particular atomic process results in three values of the electron kinetic energy: Ψ1 has Ee = 10 eV, with probability 0.2. Ψ2 has Ee = 16 eV, with probability 0.3. Ψ3 has Ee = 34 eV, with probability 0.5. The electron's wave function can be written as a quantum superposition: Ψ = aΨ1 + bΨ2 + cΨ3 What are the magnitudes of a, b, and c?
Answer:
|a| = 0.447
|b| = 0.547
|c| = 0.707
Step-by-step explanation:
From available data
Ψ1 = Ee = 10eV probability = 0.2
Ψ2 = Ee = 16eV, probability = 0.3
Ψ3 = Ee = 34eV, probability = 0.5
The magnitude of a
= a² = 0.2
= a = √0.2
|a| = 0.447
The magnitude of b
b² = 0.3
b = √0.3
|b| = 0.547
The magnitude of c
c² = 0.5
c = √0.5
|c| = 0.707
So in conclusion we have magnitude of a = 0.447
b = 0.547
c = 0.707
The magnitude of a , b and c are [tex]0.447, 0.547[/tex] and [tex]0.707[/tex] respectively.
Electron kinetic energy :The electron's wave function is given as,
[tex]\psi=a\psi _{1}+b \psi _{2}+c\psi _ {3}[/tex]
three values of the electron kinetic energy is given as,
[tex]\psi _{1}[/tex] has E = 10 eV, with probability 0.2
[tex]\psi _{2}[/tex] has E = 16 eV, with probability 0.3.
[tex]\psi _{3}[/tex] has E= 34 eV, with probability 0.5.
The value of a, b and c shown below,
[tex]a^{2}=0.2\\ \\a=\sqrt{0.2}=0.447\\ \\b=\sqrt{0.3}=0.547\\ \\c=\sqrt{0.5}=0.707[/tex]
Learn more about the Kinetic energy here:
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Identify the coefficients in the expression . Check all that apply
3a-6b + 11
A . 3
B . 6
C . -6
D . 11
E. -11
Answer:
A and C
Step-by-step explanation:
Because coeficcients are numbers that come before a variable
At 2 hours before sunset, the temperature is 0°F. At 2 hours after sunset, the temperature is −4°F. Identify the slope, y-intercept, x-intercept, and equation that represents the temperature, y, as it changes over time, x.
Answer:
[tex]Slope = -1[/tex]
[tex]y = -2[/tex] --- y intercept
[tex]x = -2[/tex] ---- x intercept
[tex]y = -x - 2[/tex] --- equation
Step-by-step explanation:
Given
Represent temperature with y and time with x
When
[tex]y = 0F; x = 2hrs\ before\ sunsets[/tex]
[tex]y = -4F; x = 2hrs\ after\ sunset[/tex]
Solving Slope;
[tex]Slope = \frac{y_2 - y_1}{x_2 - x_1}[/tex]
[tex]Slope = \frac{-4 - 0}{2 - (-2)}[/tex]
[tex]Slope = \frac{-4 - 0}{2 +2}[/tex]
[tex]Slope = \frac{-4}{4}[/tex]
[tex]Slope = -1[/tex]
Using
[tex]Slope = \frac{y - y_1}{x - x_1}[/tex], we can get the equation
Where
[tex]Slope = -1[/tex]
[tex]x_1 = -2[/tex]
[tex]y_1 = 0[/tex]
This gives:
[tex]-1 = \frac{y - 0}{x -(-2)}[/tex]
[tex]-1 = \frac{y}{x +2}[/tex]
Cross multiply
[tex]y = -x - 2[/tex]
Take x as 0; to solve the y intercept
[tex]y = -0 - 2[/tex]
[tex]y = -2[/tex]
Take y as 0; to solve the x intercept
[tex]0 = -x -2[/tex]
[tex]x = -2[/tex]
Answer:Answer:
--- y intercept
---- x intercept
--- equation
Step-by-step explanation:
Given
Represent temperature with y and time with x
When
Solving Slope;
Using
, we can get the equation
Where
This gives:
Cross multiply
Take x as 0; to solve the y intercept
Take y as 0; to solve the x intercept
Step-by-step explanation:
What's the first step to solve this equation? *
h - 18/10 = –14
Answer:
multiply by 10 on both sides
that is to get rid of the denominator
1. A student says that the zeros of y = (x - 2)(x + 7) are -2 and 7. Is the student correct? If not, describe and correct the error the student made.
2. Explain why x^2 + 25 is not equal to (x + 5)^2?
3. Describe how the factoring can help you find the x-intercepts of the graph of the quadratic function y = x^2 - 4x + 3.
Answer: 1) NO. the zeros are: 2 and -7
2) (x + 5)² has a middle term when in expanded form
3) Factoring provides the Intercept form: y = a(x - p)(x - q)
Step-by-step explanation:
1) y = (x - 2)(x + 7)
To find the zeros, set the factors equal to zero:
0 = x - 2 0 = x + 7
x = 2 x = -7
The zeros are 2 and -7.
The student did not set the factors equal to zero.
2) (x + 5)² = (x + 5)(x + 5)
= x² + 5x + 5x + 25
= x² + 10x + 25 ≠ x² + 25
3) The Intercept form of a quadratic equation is: y = a(x - p)(x - q) where p and q are the x-intercepts. Notice that the intercept form IS the factored form. Set the factors equal to zero to find the x-intercepts.
y = x² - 4x + 3
y = (x - 1)(x - 3) --> Intercept form
0 = (x - 1)(x - 3) --> finding the zeros (aka x-intercepts)
0 = x - 1 0 = x - 3
x = 1 x = 3 --> zeros are 1 and 3
1.The zeroes are 2,-7
2.[tex]x^2 + 25\neq ( x + 5)^{2}[/tex]
3. So, factoring can help to find the x-intercepts
1.We have y = (x - 2)(x + 7)
For zeroes of y , Put y=0
(x - 2)(x + 7) =0
x=2,-7
So, the zeroes of y = (x - 2)(x + 7) are 2 and -7.
2. We have [tex]x^2 + 25[/tex]
[tex]x^2 + 25= x^2 + 5^{2}[/tex]
And
[tex](x+ 5)^{2} \\=x^{2} +5^{2} +10x\\=x^{2} +25 +10x\\\neq x^{2} +25[/tex]
So, [tex]x^2 + 25\neq ( x + 5)^{2}[/tex]
3.We have the quadratic function [tex]y = x^2 - 4x + 3[/tex]
[tex]y=x^2 - 4x + 3\\=(x-3)(x-1)\\[/tex]
For x-intercept put y=0, we get
[tex](x-3)(x-1)=0\\x=3,x=1[/tex]
So, factoring can help to find the x-intercepts of the graph of the quadratic function [tex]y = x^2 - 4x + 3.[/tex]
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