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3 years ago

Will give brainliest if correct.

Mathematics

2 answers:

makkiz [27]3 years ago

8 0

Answer:

$420.00

Step-by-step explanation:

Let x = cost after 9 months. Let y = cost of phone.

x = y + (r · t)

y = $60.00

r = monthly rate of $40.00

t = time period of 9 months

x = $60.00 + [($40.00/month)(9 months)]

The months cancel, leaving dollars.

x = $60.00 + [$360.00] = $420.00

Cloud [144]3 years ago

3 0

Answer:

$300

Step-by-step explanation:

So the equation would look like this since you pay a one time fee on $60 that is the y-intercept, and since you pay $40 per month that is you m or slope constant rate of change etc.

The equation looks like this.

y = 40x + 60

Since it wants to know how much after 6 months plug in 6 where the x is.

y = 40(6) + 60

y = 240 + 60

y = 300

$300

Hope this helps!!

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Read 2 more answers

write the slope intercept form of the equation of the line with a slope of -2/5 that passes through 15, -9/2

Sever21 [200]

Answer:

The equation of line in slop-intercept form is y = $\dfrac{-2x}{5}$ + $\dfrac{3}{2}$

Step-by-step explanation:

Given as :

The slope of the a line = m = $\dfrac{-2}{5}$

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According to question

Equation of line in slope - intercept form

y - $y_1$ = m × ( x - $x_1$ )

Or, y - ( $\dfrac{- 9}{2}$ ) = $\dfrac{-2}{5}$ × ( x - 15 )

Or, y - ( $\dfrac{- 9}{2}$ ) = $\dfrac{-2}{5}$ × x - ( $\dfrac{-2}{5}$ ) × 15

Or, y - ( $\dfrac{- 9}{2}$ ) = $\dfrac{-2}{5}$ × x + 6

Or, y = $\dfrac{-2}{5}$ × x + 6 - $\dfrac{9}{2}$

Or, y = $\dfrac{-2}{5}$ × x + $\dfrac{12-9}{2}$

Or, y = $\dfrac{-2}{5}$ × x + $\dfrac{3}{2}$

So, The equation of line in slop-intercept form y = $\dfrac{-2}{5}$ × x + $\dfrac{3}{2}$

Hence, The equation of line in slop-intercept form is y = $\dfrac{-2x}{5}$ + $\dfrac{3}{2}$ Answer

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3 years ago

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Answer/Step-by-step explanation:

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