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3 years ago

11

What’s the answer to this

2 answers:

Alchen [17]3 years ago

6 0

Answer:

B

Step-by-step explanation:

I solved in the picture

Hope this helps ^-^

stepan [7]3 years ago

5 0

Answer:X=2, and -36

Step-by-step explanation:

Ehh

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Sanjay graphs a quadratic function that has x-intercepts of –3 and 7. Which functions could he have graphed?

kykrilka [37]

we will select each options and find zeros

(a)

$g(x)=x^2-4x-21$

for finding x-intercept , we can set g(x)=0

and then we can solve for x

$g(x)=x^2-4x-21=0$

now, we can factor it

$(x-7)(x+3)=0$

we get

$x=7,x=-3$

so, this is TRUE

(b)

$g(x)=(x-3)(x+7)$

we can set it to 0

and then we can solve for x

$g(x)=(x-3)(x+7)=0$

we get

$x=3,x=-7$

so, this is FALSE

(c)

$g(x)=3x^2-12x-63$

we can set it to 0

and then we can solve for x

$g(x)=3x^2-12x-63 =0$

$3(x^2-4x-21) =0$

$3(x-7)(x+3) =0$

$x=-3,x=7$

so, this is TRUE

(d)

$g(x)=-(x+3)(x-7)$

now, we can set it to 0

and then we can solve for x

$g(x)=-(x+3)(x-7)=0$

$x=-3,x=7$

so, this is TRUE

(e)

we have

$g(x)=x^2+4x-21$

now, we can set it to 0

and then we can solve for x

$g(x)=x^2+4x-21=0$

$(x+7)(x-3)=0$

$x=-7,x=3$

so, this is FALSE

5 0

3 years ago

Read 2 more answers

Someone please help!!! This is due tonight!! I’ll give brainliest

3241004551 [841]

Answer:

($0.5 x 2) + ($1.25 x 3) + ($0.75 x 3) = $7

6 0

3 years ago

Read 2 more answers

If f(x) = 5x + 40, what is f(x) when x = -5?

Makovka662 [10]

Answer:

f(-5) = 15

Step-by-step explanation:

f(x)=5x+40

plug in x as -5

f(-5) = 5(-5) + 40

multiply 5 by -5

-25+40

add -25 to 40

15

6 0

3 years ago

What is the inverse function for h(x) = <img src="https://tex.z-dn.net/?f=%5Csqrt%7Bx%2B7%7D%20-1" id="TexFormula1" title="\sqrt

Blizzard [7]

Step-by-step explanation:

$y = \sqrt{x + 7} - 1$

Replace x and y.

$x = \sqrt{y + 7} - 1$

Solve for y.

$x + 1 = \sqrt{y + 7}$

Square both sides.

$(x + 1) {}^{2} = y + 7$

$(x + 1) {}^{2} - 7 = y$

This is the inverse function or you can also say

${x}^{2} + 2x - 6 = y$

5 0

3 years ago

40 POINTS + BRAINLIEST!

kotegsom [21]

Asnwer:
15 Units
Hope this helps! :)

4 0

3 years ago

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