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3 years ago

Will mark brainiest and will give free points if all correct asap plzzzzzzzzzzzzzzzzzzzzzzzzzzzz

Mathematics

1 answer:

rewona [7]3 years ago

3 0

I think this is how you do it.

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Craig earns the same amount of money each month. His telephone bill is 1/20 of his monthly earnings, and he pays a total of $720

Juliette [100K]

Answer: $1200
Explanation:
The amount of telephone bill Craig has to pay each month: $720/12= $60
His earnings each month: $60 x 20 = $1200

7 0

3 years ago

NO LINKS!!

yan [13]

Answer:

$y=-\dfrac{1}{2}(x+4)^2-1$

Step-by-step explanation:

Vertex form: $y=a(x-h)^2+k$

where:

$(h, k)$ is the vertex
$a$ is some constant

Given:

vertex = (-4, -1)
point on parabola = (-2, -3)

Substitute given values into the formula to find $a$ :

$\implies -3=a((-2)-(-4))^2+(-1)$

$\implies -3=a(2)^2-1$

$\implies -3=4a-1$

$\implies -2=4a$

$\implies a=-\dfrac{2}{4}=-\dfrac{1}{2}$

Therefore, the equation of the parabola is:

$y=-\dfrac{1}{2}(x+4)^2-1$

6 0

2 years ago

Read 2 more answers

Solve the system of linear equations by graphing. y=2x−3 y=x+2

Musya8 [376]

Step-by-step explanation:

y=2x−3

y=x+2

y=-3

x=3/2

for the second line

y=2

x=-2

7 0

3 years ago

Can somebody plz help me answer this question plz!

jasenka [17]

Answer:

$y=-x+9$

Step-by-step explanation:

This is asking you to write the equation in slope-intercept form:

$y=mx+b$

where:

m is the slope
b is the y-intercept
x and y are any corresponding coordinate points (x,y)

You need to find the slope of the two given points using:

$(x_{1},y_{1})\\\\(x_{2},y_{2})\\\\\frac{y_{2}-y_{1}}{x_{2}-x_{1}}=slope$

Insert the values:

$(4_{x_{1}},5_{y_{1}})\\\\(-6_{x_{2}},15_{y_{2}})\\\\\frac{15-5}{-6-4} =\frac{10}{-10} =-\frac{10}{10} =-1$

The slope of the given line is -1. Insert this value into the equation:

$y=-1x+b\\\\y=-x+b$

Now insert one of the given coordinate points as x and y to solve for b:

$(4_{x},5_{y})\\\\5=-4+b\\\\5+4=-4+4+b\\\\9=b$

The y-intercept is 9. Insert the value:

$y=-x+9$

:Done

8 0

3 years ago

Which are the coordinates of the blank?

SSSSS [86.1K]

Answer:

its C. (3,7)

Step-by-step explanation:

8 0

3 years ago

Read 2 more answers