Answer:
x = 6, y = -7 or (6, -7)Step-by-step explanation:
Given system of equations
5x+4y=2 3x+3y=-3Solving as follows:
Simplify the second equation by dividing all terms by 3
3x+3y=-3 divide by 3⇒ x + y = -1Now, considering the coefficient of x of 5 in the first equation, we will multiply the simplified second equation by 5 and subtract from the first equation:
x + y = -1 multiply by 5⇒5x + 5y = -5Subtract it from 5x + 4y = 2
5x + 4y - 5x - 5y = 2 - (-5)-y = 7y = -7Finding x using simplified second equation:
x + (-7) = -1x = - 1 + 7x = 6Answer is (6, -7)
1/5 of 45 is what number
Answer:
The number is 9
Step-by-step explanation:
Of means multiply and is means equals
1/5 * 45 = N
9 = N
The number is 9
Answer:
answer is 9 pllz mark me brainliest
Step-by-step explanation:
Write and expression to model the following phrase an hourly wage of $13.50 plus a $75 bonus
Answer:
75+13.50x
x=hours
2x +
YS
= 7
1
62
2y = 5
Which would be a more helpful for solving the system: adding the two
equations or subtracting one from the other? Explain your reasoning.
Solve the system without graphing. Show your reasoning.
Answer:
subtracting one from the other
Step-by-step explanation:
The equations are not well written. Let us assume the equations are:
2x + y = 7 .... 1
2x + 2y = 5 ....2
Looking at the two equations, using elimination method will be the best way to go.
Since the coefficient of the variable x are the same, we can take the difference of both equation to cancel out the variable x and get y as shown;
(2x-2x) + (y-2y) = 7-5
0 - y = 2
y = -2
Note that you can only subtract if the coefficient of the variables in both equations have the same coefficient (same sign) and add if they have different signs
They each have a fish tank holding 20 units of water. Whose tank holds 20 gallons? Whose holds 20 cups?
Answer:
Elena's fish tank has 20 gallons because Lin's fish wouldn't be able to hold 20 gallons
Step-by-step explanation:
can someone help me and show me all the steps you did to get the answer
STEP BY STEP
name the angle pairs shown. Then find the missing angle measure
1. Angle pair
2. M
Answer:
x would be 110 degrees as well and its pair would be the angle opposite of it. The other pair of angles would be the ones next to it. Those equal250 degrees.
Step-by-step explanation:
Earth's diameter is
approximately 1.2756 x 104 kilometers.
The surface area of a sphere can be
found using the formula SA = 4(pie)r^2.
What is the approximate surface area
of Earth?
Answer:
Area
Step-by-step explanation:
Surface area is 55278.36 when Earth's diameter is approximately 1.2756 x 104 kilometers.
What is Three dimensional shape?a three dimensional shape can be defined as a solid figure or an object or shape that has three dimensions—length, width, and height.
Given,
Earth's diameter is approximately 1.2756 x 104 kilometers.
Diameter=1.2756 x 104=132.66km
Radius =Diameter/2=66.33 km
We need to find surface area of earth by formula
Surface area = 4πr²
= 4×3.142×(66.33)²
=55278.36
Hence, the surface area is 55278.36 when Earth's diameter is approximately 1.2756 x 104 kilometers.
To learn more on Three dimensional figure click:
https://brainly.com/question/2400003
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2. Which of the following statements illustrates
the commutative property of addition?
A 7 + 0 = 7
B 2(5 + 1) = 2(5) + 2(1)
C 4 + 9 = 9 + 4
Find the value of x
(2x-8)
(x-7)
Answer:
add them together and equal them to 180 i think
Step-by-step explanation:
PLEASE HURRY, ILL GIVE BRAINLIEST TO WHOEVER SOLVES IT
I used Desmo's for the graph, I am not 100 percent sure but I think -4,5 does fall fot both graphs so it is a solution.
please help will give brainliest to whoever explains!! tysm
Answer:
200
Step-by-step explanation:
Average means the mean of the numbers
The mean is all the numbers added together and then divided by how many numbers there are.
Since there are 3 numbers, you add them together. (150+200+250)
The three numbers together equal 600
Next, you do 600/3 since there are 3 numbers you added together.
That equals 200!
I hope this helps and if you are satisfied please mark me brainliest.
Bus A and bus B leave at 8:00am. Bus A leaves 25mins but Bus B leaves 35mins if they keep continuing in the same route what time will both buses be back?
Answer:
they would both be at the depot again at 8:35 am.
Step-by-step explanation:
no point in explaining cause ur a noob at math
this is geometry. idk how to do it
Answer:
Down below
Step-by-step explanation:
Hope this helps!
Use the slope formula to find the slope of the line passing through the
points (-3, 1) and (0,4),
Answer:
1
Step-by-step explanation:
The slope formula is
[tex]m = \frac{y1 - y2}{x1 - x2} [/tex]
[tex]m = \frac{1 - 4}{ - 3 - 0} \\ \\ = \frac{ - 3}{ - 3} = 1[/tex]
A tree is 212 feet tall. How tall will it be in 3 years if it grows 14 foot each year?
Which method will NOT give the correct number of feet?
Complete the square. Fill in the number that makes the polynomial a perfect-square quadratic. j2 + 14j +
Answer:
Step-by-step explanation: is 81
Can someone help me answer this I don’t get it and I need to finish it
Answer:Its 315
Step-by-step explanation:
Hope this helps!
Identify the domain of the function.
Answer:
Step-by-step explanation:
domain represents the numbers at the x endpoints of a graph.
on the graph we see that on the left, the line ends when x is -4
on the right, the line ends when x is 4
the domain is
-4, 4
but notice how on the left there is an open circle
this will be written with a parentheses
( -4, 4
and notice how on the right there is a closed circle
this will be written with a bracket
(-4, 4]
so the answer is C
A student has started a lawn care business. He charges $15 per hour to mow lawns and $20 per hour for gardening. Because he is still in school, he is only allowed to work for at most 20 hours per week. His goal is to make at least $300 per week. 1. Create a system of equations or inequalities that models the situation. Define the variables you use.
Answer:
15x=300, x=20
20x=300, x=15
Step-by-step explanation:
Answer:
:)
Step-by-step explanation:
15x=300
x will equal 20
20x=300
x will equal 15
the diameter of a circle is 4 cm. find it's area in terms of pi?!
Step-by-step explanation:
Radius of the circle = Diameter / 2 = 2cm.
Area = pi * (Radius)² = 4pi cm².
Answer:
4[tex]\pi[/tex]
Step-by-step explanation:
Radius is always half of the diameter.
So, 4/2=2
Now that we know the radius, we find the are.
The equation for area is [tex]\pi r^2[/tex]. When you insert everything, you get....
[tex]\pi[/tex][tex]*[/tex][tex]2^{2}[/tex]
When you put it all together, we get... 4[tex]\pi[/tex]
Hope this helped :)
15 POINTS PLS HELP
What is the slope of a line that is parallel to -x + 3y = 6
o – 1
o 1/3
O 6
O 3
Answer:
1/3
Step-by-step explanation:
Parallel lines have the same slope.
Put the line in slope-intercept form first,though.
3y=x+6
divide by 3
y=1/3x+2
What is the value of A when we rewrite
(2/3)^x+4 - (2/3)^x as A • (2/3)^x
Answer:
A= –65/81
Step-by-step explanation:
hope this explains it
The solution of the given equation will be 16/81.
Given that:
Equation, [tex]\rm \left ( \dfrac{2}{3} \right)^{x + 4} = A \cdot \left ( \dfrac{2}{3} \right)^x[/tex]
In other words, the collection of all feasible values for the parameters that satisfy the specified mathematical equation is the convenient storage of the bunch of equations.
Simplify the equation, then we have
[tex]\rm A \cdot \left ( \dfrac{2}{3} \right)^x=\left ( \dfrac{2}{3} \right)^{x + 4} \\\\\rm A \cdot \left ( \dfrac{2}{3} \right)^x=\left ( \dfrac{2}{3} \right)^{x }\left ( \dfrac{2}{3} \right)^4[/tex]
Further, simplify, then we have
A = (2/3)⁴
A = 16/81
More about the solution of the equation link is given below.
https://brainly.com/question/22613204
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PLEASE HELP. Write the equation in point-slope form of the line that passes through the given point
and has the given slope.
(4,-7); m = -1/4
a. y +7 = -1/4(x - 4)
b. y + 4 = -1/4(x-7)
c. y - 4 = -1/4(x + 7)
d. y - 7 = -1/4(x - 4)
Answer:
A) [tex]y+7=-\frac{1}{4}(x-4)[/tex]
Step-by-step explanation:
The point-slope from equation is:
[tex](y-y_{1})=m(x-x_{1})\\[/tex]
Where the coordinate given is:
[tex](x_{1},y_{1})[/tex]
m = [tex]-\frac{1}{4}[/tex]
2(w-1)+8=6(2w-4) please help w=?
Answer:
W = 3
Step-by-step explanation:
2(W - 1) + 8 = 6(2w - 4)
2w - 2 + 8 = 12w - 24
2w + 6 = 12w - 24
6 = 10w - 24
30 = 10w
3 = W
Hope this helps. Pls give brainliest.
What are the solutions to y=10x2+29x−21
x= and x=
Enter your answers as a fraction. examples: 1/2 4/9 9/5
Answer:
x 2 +(29/10)x-(21/10) = 0 Add 21/10 to both side of the equation : x 2 +(29/10)x = 21/10 Now the clever bit: Take the coefficient of x , which is 29/10 , divide by two, giving 29/20 , and finally square it giving 841/400 Add 841/400 to both sides of the equation
Step-by-step explanation:
Amanda, Bobby, and Clark went shopping for school supplies.
Amanda bought one pen and one notebook and spend $5.75.
Bobby bought one pen and one eraser and spent $3.50. Clark
bought one notebook and one eraser and spent $4.75. How much
does each item cost?
Answer:
Pen: $2.25
Notebook: $3.50
Eraser: $1.25
Step-by-step explanation:
The explanation is below. Ask if you need anything else!
Hope this helps!
please is this a function and why? My mom already got mad at me I don’t want her getting mad anymore if I get this wrong:(
Please simplify 10 divided by 8 divided by 7 and put t as a fraction please and thank you:)
Answer: 5 over 28 ㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤ
Step-by-step explanation:
The formula for simple interest is | = Prt where P is the principal, r is the interest rate, and t is time solve the formula for r
Answer:
It/p= r
Step-by-step explanation:
divide p and t out of the r and multiply by the recipricol
Don’t mind wat I clicked I don’t know if it’s right but please help
Answer:
y = 5x
Step-by-step explanation:
Answer:
A
Step-by-step explanation:
For every 1 the x goes right, the y goes up 5
