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3 years ago

If y = (x-5)(x+7) then what does x equal?

Mathematics

1 answer:

DochEvi [55]3 years ago

7 0

Answer:

x = 5, x = -7

Step-by-step explanation:

If you mean find the roots, then x = 5 and x = -7

Because roots makes the equation equal to 0 and 5 - 5 = 0 and -7 + 7 = 0

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If f(x) = - 8x +2 then f^-1(x) =

mrs_skeptik [129]

Answer:

f^-1(x) = -1/8x +1/4

Step-by-step explanation:

To find the inverse of a function

Exchange x and y and then solve for y

y =-8x+2

Exchange x and y

x = -8y+2

Now solve for y

Subtract 2 from each side

x-2 = -8y+2-2

x-2 = -8y

Divide by -8

(x-2)/-8 = -8y/-8

Distribute

-1/8x +1/4 = y

f^-1(x) = -1/8x +1/4

3 0

3 years ago

Pls help I struggling a lot pls pls pls I need pro math expert

Soloha48 [4]

Answer:

Option: $h\leq 16$

Step-by-step explanation:

Looking for key words in the problem:

"At Most" represents important key words, meaning the maximum amount of hotdogs that are at the barbecue.

Inequality:

$h\leq 16$

h $\leq$ 16 represents the maximum amount of hotdogs that has to be at the barbecue, also represents less than 16 can be cooked.

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2 years ago

Write in slope-intercept form an equation of the line that passes through the given points.

nlexa [21]

Answer: y = 1/ 8 x − 1

8 0

3 years ago

Jane’s cell phone plan is $40 each month plus $0.15 per minute for each minute over 200 minutes of call time. Janes cell phone b

san4es73 [151]

Answer:

The equation is $40+0.15m = 58.00$ whose solution is $m =120\:minutes.$

Step-by-step explanation:

Let us call $m$ the number of minutes the phone is used over 200 minutes, then we have

$\boxed{40+0.15m = 58.00}$ (this says monthly bill of $40 plus the cost of phone usage over 200 minutes must equal $58 )

This equation can be used to solve for $m$ u as follows:

$0.15m = 58-40$

$m = \dfrac{18}{0.15}$

$\boxed{m = 120\:minutes}$

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3 years ago

Please help with slope i really need help

nadezda [96]

Answer:

you got elementary and your struggling

Step-by-step explanation:

u need to go to school

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3 years ago