Answers
16. Function
17. Not
18. Not
19. Function
Related Questions
What is the value of x in the solution to the system of equations?
Answers
Answer: You can solve this using a graphing calculator or an online calculator.
Step-by-step explanation:
1. Solve each equation for y:
x - 7 = 2y so y = (1/2)x - (7/2)
3x - 21 = 2y so y = (3/2)x - (21/2)
2. Graph the 2 equations
3. Find the intersection using the calculator
They intersect at (7,0). Those values of y make both of these equations true.
You can check this by plugging the values in:
(7) - 2(0) = 7 That's true
2(7) - 2(0) = 21 That's also true
Any values that make both equations true are solutions. Each of these equations is linear, and the lines in the graph just cross once, so there is one solution to this system of equations.
does someone know these answers??? PLEASE HELPPP ASAPPP
Answers
Answer:
it's false
Step-by-step explanation:
Hope this helps you.
Please HELP ASAP!!!!!!!
Answers
Answer:
Step-by-step explanation:
58
30 points will mark brainlyist
Write the equation of line that is perpendicular to x = 6 and passes through the point (2.8) (do not put spaces in your answer)
Answers
Answer:
y=18x+16
Step-by-step explanation:
ty
Two bells ring every 10 and 25 minutes respectively. They start ringing together at 6 a.m. At what time will they next ring together?
Answers
Answer:
6:50
Step-by-step explanation:
The bell that rings every 10 min will ring at 6:00, 6:10, 6:20,6:30, 6:40, 6:50
The bell that rings every 25 min will ring at 6:00, 6:25, and 6:50
ASAP
He pays $15 per month and $0.20 per minute for local air time. Calvin signed up for another plan. He pays $25 per month and $0.10 per minute.
a) Write an equation representing Korey's cellular phone service.
b) Write an equation representing Calvin's cellular phone service.
c) Solve a system of equations to calculate when Cory's and Calvin's costs are the same. After how many minutes will this occur? write your answer in the form (x,y)
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Answer:a. Y=15+.20x
B. Y=25+.10x
C. (100, 35)
Step-by-step explanation:
In Amy’s garden, the ratio of herbs to vegetable plants is 5:2. If there are 40 herb plants, how many vegetable plants are in Amy’s garden? Answer without units.
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Answer: 16
Step-by-step explanation: 40/5 is 8 and 2 times 8 is 16. 5:2=40:16
4x^2-15x-4
factorise please
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______________________________
1.) Change the equation using factored transformation: [tex]4x^2-15x-4=0[/tex]- Quadratic polynomial can be factored using the transformation [tex]ax^2+bx+c=a(x-x_{1})(x-x_{2})[/tex], where [tex]x_{1}[/tex] and [tex]x_{2}[/tex] are the solutions of the quadratic equation [tex]ax^2+bx+c=0[/tex].
- This steps basically means change you current equation using the formula [tex]ax^2+bx+c=0[/tex].
2.) Turn the factored form into the quadratic equation form:[tex]x=\frac{-(-15)\frac{+}{}\sqrt{(-15)^2-4\bold{x}4(-4)}}{2\bold{x}4}[/tex]- All equations of the form [tex]ax^2+bx+c=0[/tex] can be solved using the quadratic formula: [tex]\sqrt{\frac{-b\frac{+}{}\sqrt{b^2-4ac}}{2a} }[/tex].
- The quadratic equation formula gives two solutions, one when [tex]\frac{+}{}[/tex] is addition and one when it is subtraction.
3.) Square -15:[tex]-15^2=225[/tex]
Equation at the end of Step 3:
[tex]x=\frac{-(-15)\frac{+}{}\sqrt{225-4\bold{x}4(-4)}}{2\bold{x}4}[/tex]4.) Multiply −4 times 4:[tex]-4[/tex] × [tex]4=-16[/tex]Equation at the end of Step 4:
[tex]x=\frac{-(-15)\frac{+}{}\sqrt{225-16(-4)}}{2\bold{x}4}[/tex]5.) Multiply −16 times −4:[tex]-16[/tex] × [tex]-4=64[/tex]Equation at the end of Step 5:
[tex]x=\frac{-(-15)\frac{+}{}\sqrt{225+64}}{2\bold{x}4}[/tex]6.) Add 225 to 64:[tex]225+64=289[/tex]Equation at the end of Step 6:
[tex]x=\frac{-(-15)\frac{+}{}\sqrt{289}}{2\bold{x}4}[/tex]7.) Take the square root of 289:[tex]\sqrt{289}=17[/tex]Equation at the end of Step 7:
[tex]x=\frac{-(-15)\frac{+}{}17}{2\bold{x}4}[/tex]8.) Change -15 to positive 15:[tex]-15=15[/tex]Equation at the end of Step 8:
[tex]x=\frac{15\frac{+}{}17}{2\bold{x}4}[/tex]9.) Multiply 2 by 4:[tex]2[/tex] × [tex]4=8[/tex]Equation at the end of Step 9:
[tex]x=\frac{15\frac{+}{}17}8}[/tex] 10.) Now Solve:Now solve the equation [tex]x=\frac{15\frac{+}{}17}8}[/tex] when [tex]\frac{+}{}[/tex] is plus.
Add 15 to 17:
[tex]15+17=32[/tex][tex]x=\frac{32}{8}[/tex]Divide 32 by 8:
[tex]32[/tex] ÷ [tex]8=4[/tex][tex]x=4[/tex]Now solve the equation [tex]x=\frac{15\frac{+}{}17}8}[/tex] when [tex]\frac{+}{}[/tex] is minus.
Subtract 15 by 17:
[tex]15-17=-2[/tex][tex]x=\frac{-2}{8}[/tex]Reduce the fraction to lowest terms by extracting and canceling out 2:
[tex]-2[/tex] ÷ [tex]-2=-1[/tex] [tex]8[/tex] ÷ [tex]-2=-4[/tex][tex]x=-\frac{1}{4}[/tex]11.) Factor the expression:Factor the original expression using [tex]ax^2+bx+c=a(x-x_{1})(x-x_{2})[/tex]. Substitute 4 for [tex]x_{1}[/tex] and [tex]-\frac{1}{4}[/tex] for [tex]x_{2}[/tex]:
[tex]4x^2-15x-4=4(x-4)(x-(-\frac{1}{4}))[/tex]Simplify all the expressions of the form [tex]p-(-q)[/tex] to [tex]p+q[/tex]:
[tex]4x^2-15x-4=4(x-4)(x+\frac{1}{4})[/tex]Add [tex]\frac{1}{4}[/tex] to x by finding a common denominator and adding the numerators. Then reduce the fraction to lowest terms if possible:
[tex]4x^2-15x-4=4(x-4)\bold{x}(\frac{4x+1}{4})[/tex]Cancel out 4, the greatest common factor in 4 and 4:
[tex]4x^2-15x-4=(x-4)(4x+1)[/tex]______________________________
Convert 22% to a fraction
Answers
Answer:
11/50
Step-by-step explanation:
1x+4
--------- =6x+1 for x
7
Answers
Step-by-step explanation:
1x+4= (6x+1 )×7
1x+4= 42x+7
1x-42x= 7-4
-41x = 3
x= -3/41
What is the least common multiple of 5 & 6?
Answers
Answer:
30
Step-by-step explanation:
5=5,10,15,20,25,(30),35
6=6,12,18,24,(30),36
30 is the first number that can be used to divide both numbers
Answer:
30
Step-by-step explanation:
5* 6 =30 and no number less than 30 works :)
Select all equations that are equivalent to 2x + 2 = 10
1) 6x + 2 = 10
2) 6x + 6 = 30
3) 2x = 8
6x = 10
Answers
Answer:
6x + 6 = 30
2x = 8
plz give brainlyist
Step-by-step explanation:
6x + 2 = 10
to get the first term to be 6x you need to mulitply by 3 but if you did then the equation would be 6x + 6 = 30 so it is not equivlent
6x + 6 = 30
if you multiply both side by 3 you get 6x + 6 = 30
2x+8
if you subtract 2 from both sides you get 2x = 8
6x = 10
to get the first term to be 6x you need to mulitply by 3 but if you did then the equation would be 6x + 6 = 30 then if you subtract 6 from both sides you get 6x = 24 so it is not equivlent
As a diver swims deeper underwater, the water pressure in pounds per square inch (PSI) increases on the diver. The table shows the pressure in PSI for several depths of water.
For a submarine the pressure increases at 4 times the rate of a diver. Which equation represents p, the water pressure in square inches for a submarine, as a function of d, the depth in feet?
Answers
Answer:
C. p = 1.72d
Step-by-step explanation:
The rate of change for the diver is 0.43. 0.43 x 4 = 1.72d.
The equation for the rate of change for the diver is 1.72d.
It is required to find the equation.
What is arithmetic?Arithmetic is the branch of mathematics that deals with the study of numbers using various operations on them. Basic operations of math are addition, subtraction, multiplication and division. These operations are denoted by the given symbols.
Given:
The table shows the pressure in PSI for several depths of water.
For a submarine the pressure increases at 4 times the rate of a diver.
The water pressure in square inches for a submarine=p
The depth in feet =d
So we have to find the equation
The rate of change for the diver is
0.43. 0.43 x 4
= 1.72d.
Therefore, the equation for the rate of change for the diver is 1.72d.
Learn more about arithmetic here:
https://brainly.com/question/11559160
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Please help me I’m gonna be sad if you don’t
Answers
Answer:
C
Step-by-step explanation:
The first line goes to the right so it is an negative. The second line is also going to the right so it is also a negative. Two negatives make a positive!
What is the area of the following circle
Either enter an exact answer in terms of pi or use 3.14 for pi and enter your answer as a decimal.
Answers
3 over 6=k over 7- find k's value
Answers
Step-by-step explanation:
3/6=k/7
cross multiply then
6k=21
divide by the coefficient of k
k=3.5
For each equation, find y when x=-3. Then find x when y = 2
a. y = 6x + 8
b. y= 3x
C. y=-x+5
d. y=2x-2
e. y = 1.5x + 11
Answers
Step-by-step explanation:
a)y=-10 x=-1
b)y=-9 x=2/3
c) y=8 x=3
d)y=-8 x=2
e)y=15.5 x=-6
hope this helps bro
The correct values are;
a) y = - 10, x = - 1
b) y = - 9, x = 2/3
c) y = 2, x = 3
d) y = - 8, x = 2
e) y = 6.5 , x = 6
What is an expression?
Mathematical expression is defined as the collection of the numbers variables and functions by using operations like addition, subtraction, multiplication, and division.
Given that;
There are some expressions.
Now,
Find all the values after substitute the values as;
a. y = 6x + 8
When x = - 3;
y = 6 × - 3 + 8
y = - 18 + 8
y = - 10
When y = 2,
y = 6x + 8
2 = 6x + 8
2 - 8 = 6x
- 6 = 6x
x = - 1
b. y = 3x
When x = - 3;
y = 3 × - 3
y = - 9
When y = 2,
y = 3x
2 = 3x
x = 2/3
c. y = - x + 5
When x = - 3;
y = - 3 + 5
y = 2
When y = 2,
y = - x + 5
2 = - x + 5
x = 5 - 2
x = 3
d. y = 2x - 2
When x = - 3;
y = 2 × - 3 - 2
y = - 6 - 2
y = - 8
When y = 2,
y = 2x - 2
2 = 2x - 2
2x = 2 + 2
2x = 4
x = 2
e. y = 1.5x + 11
When x = - 3;
y = 1.5 × - 3 + 11
y = - 4.5 + 11
y = 6.5
When y = 2,
y = 1.5x + 11
2 = 1.5x + 11
1.5x = 2 - 11
1.5x = - 9
x = 6
Thus, The correct values are;
a) y = - 10, x = - 1
b) y = - 9, x = 2/3
c) y = 2, x = 3
d) y = - 8, x = 2
e) y = 6.5 , x = 6
Learn more about the mathematical expression visit:
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james and his sister save money for a trip to the water park. james has saved half the amount of money as his sister has saved. If they both save 30 more, james will have saved 3/4 as much as her sister. What equation could you use to find how much james has saved
Answers
Answer:
money saved by james = 30/2 = 15
equation used
money with James = 3/4 (money with sister)
x/2 + 30 =3/4( x + 30 )
Step-by-step explanation:
Let money saved by sister be x
given
James has saved half the amount of money as his sister has saved.
Money saved by James = x/2
Total money saved by both of them = x + x/2
If they both save 30 more
Then
money with sister = x + 30
money with james = x/2 + 30
given that If they both save 30 more, james will have saved 3/4 as much as her sister
thus,
money with james = 3/4 (money with sister)
x/2 + 30 =3/4( x + 30 )
=> 4(x+30*2) /2 = 3x+90
=> 2x + 120 = 3x + 90
=> 3x-2x = 120-90
=> x = 30
Thus,
money saved by james = 30/2 = 15
equation used
money with james = 3/4 (money with sister)
x/2 + 30 =3/4( x + 30 )
put the following equation of a line into slope-intercept form, simplifying all fractions
15x-6y=7
Answers
Answer
y=5/2x-7/6
Step-by-step explanation:
what's the value of x?
Answers
Step-by-step explanation:
180-77=103
11x+11=103
-11 on both sides
11x=92
divide by 11 on both sides
77-11=66180
x=13
180-77-90=13 plug that in and you get it
11(13)+11=154
-90
im not sure if im correct but i hope this helps
Can someone plz help me on this and Happy Holidays!
Answers
Answer:
The solution is 20. and simplified it is
2 x 10^7/10^6
Step-by-step explanation:
HHelpppp Quickk !!!! ITS DUE RIGHT NOW HElpppp
Answers
The length of segment EF is 8 units, the length of segment ED is 10 units, and the length of segment EA is 13.33 units. Find the length of FA Explain or show your reasoning,
Answers
Answer:
5.33 unit
Step-by-step explanation:
logically FA = EA - EF = 13.33-8 = 5.33 units
Since, E, F and A all lie on the same line EA . The information ED= units is redundant. Therefore we can say that FA= 5.33 unit
The length of FA is 5.33 units
The given parameters are:
[tex]\mathbf{EF = 8}[/tex]
[tex]\mathbf{ED = 10}[/tex]
[tex]\mathbf{EA = 13.33}[/tex]
EF and EA implies that point E is between line FA
So, the length of FA is calculated using:
[tex]\mathbf{FA = EA - EF}[/tex]
Substitute known values
[tex]\mathbf{FA = 13.33 - 8}[/tex]
Subtract
[tex]\mathbf{FA = 5.33}[/tex]
Hence, the length of FA is 5.33 units
Read more about lengths at:
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Write an equation of a line that is parallel to the line y = 2x + 8
A) y = 3x + 8
B) y = 1/3x + 8
C) y = 2x + 7
D) 2y = 2x + 9
Answers
Answer:
A
Step-by-step explanation:
help!!!!!!!!!!!!!!!!!!!!!
Answers
Answer:
THE FIRST AND THIRD ONE
Step-by-step explanation:
You devide 60 by the amount of points you could put. For the first one you are counting up by 10s and the third one you are counting up by 20s
20 points if you answer
Answers
Answer:
The second stove had a higher temperature when the stoves were turned off.
The first stove cooled down at a faster rate.
Step-by-step explanation:
first stove: T(t) = 180 - 2.55t can also be written as T(t) = -2.55t + 180
(180 is the y-intercept; -2.55 is the slope)
second stove = T(t) = mt + 200
(0,200) (40,130)
[tex]\frac{200 - 130}{0 - 40}[/tex] = [tex]\frac{60}{-40}[/tex] = [tex]\frac{3}{-2}[/tex] = -1.5
T(t) = -1.5t + 200
Answer:
he is correct
Step-by-step explanation:
A vehicle weighs 18,000 pounds. How many tons does the vehicle weigh?
Answers
Answer:
The vehicle weighs 9 tons.
Step-by-step explanation:
1 ton = 2,000 pounds
18,000 ÷ 2,000 = 9
I hope this helped and if it did I would appreciate it if you marked me Brainliest. Thank you and have a nice day!
What invention lets you look right through a wall?
Answers
Boyd had a pile of tennis balls. He lost 8 in the court. If he
returned home with sixteen tennis balls, how many did he start
with?
Answers
He started with 24 tennis balls
We can create an equation 8 + 16 = 24
Answer:
24
Step-by-step explanation:
16+8
Geometry help please explain
Answers
Answer:
x = 25
Step-by-step explanation:
The sum of the angles of a triangle add to 180
We have a right triangle so one of the angles is 90degrees
90 + 2x + x+ 15 = 180
Combine like terms
105+3x = 180
Subtract 105 from each side
105+3x-105 = 180-105
3x = 75
Divide by 3
3x/3 = 75/3
x = 25
Answer:
So the inside of a triangle will equal 180 degrees so, you would set up your equation as 90+2x+(x+15)= 180
you then solve that equation let me know if you didn't get the equation solved.
Step-by-step explanation:
