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choli [55]
3 years ago
7

I understand some of this but this ones got me stumped i tried pemdas but im still lost

Mathematics
1 answer:
Mandarinka [93]3 years ago
6 0
Just replace x with its given value:

9x^{2}-4x-3~~~~\text{where }x=-2\\ \\ \\ 9\cdot (-2)^{2}-4\cdot (-2)-3\\ \\ =9\cdot 4+8-3\\ \\ =36+8-3\\ \\ =41
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Please help I don’t wanna add a bunch of points Bc nobody is helping me I’m just wasting them.
Ede4ka [16]

Answer:Cross multiply and solve for x.

x/6 = 5/1.25

let the height of building be h ft

h/6 = 60/15

h = 6(60/15) = 24

the building is 24 ft high

Step-by-step explanation:

Well first let’s covert the ft to in- 5ft is 60 in and 6ft is 72 in. Then we want to set up 2 fractions based on height and shadow, so we have 60/15=x/72 (we put x because that’s what we’re trying to find). Then we do cross multiplication so now we have 15x=4320. We divide 15, so now we have 4320/15=288. So the building is 288 in tall or 24ft tall! Glad to help! :)

3 0
3 years ago
Simplest form 1/4 + 1/12
mart [117]

5/12 is the simplest form that it can be simplified to.

5 0
3 years ago
Solve for v.<br>h = vt - 16t^2<br>What is v equal to?​
maw [93]

Answer:

v = h/t + 16t

8 0
3 years ago
Use the picture for the question and the answer choices:)
Orlov [11]

Parenthesis first 5-2=3.

7^2=49

-3*3=-9

49-9=40.

A is your answer.


8 0
3 years ago
If f(x) = x2 − 2x + 9 and g(x) = 8 − x, what is (f o g)(−4)?
erastovalidia [21]
I hope this helps you

3 0
3 years ago
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