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pychu [463]
2 years ago
8

Using F(x) = 5x^2- 3, what is f(-3)? A. 42 B. -3 C.-48 D. -42

Mathematics
1 answer:
Gnom [1K]2 years ago
8 0

Answer: 42

Step-by-step explanation

Switch x out with 3

using Pemdas do the exponent first

3^2 is 9

then multiply

5*9= 45

then subtract

45-3=42

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Answer:

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Step-by-step explanation:

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3 years ago
I don’t know how to find X or Y very urgent, need to figure this out how to solve plz help
Lena [83]

Answer:

x = 9

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Step-by-step explanation:

The triangle given is a right triangle, therefore:

✔️apply trigonometric ratio formula to find x:

Reference angle = 60°

Hypotenuse = 18

Adjacent = x

Thus:

Cos (60) = x/18

Multiply both sides by 18

18×cos(60) = x

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✔️find y by applying pythagorean theorem:

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y² = 18² - 9² (substitution)

y² = 243

y = √243

y = √(81*3)

y = 9√3 = 15.6

3 0
2 years ago
Solve for the variable <br> 3x + 3 = 36<br><br> A 11<br> B 12<br> C 13<br> D 33
LenKa [72]
3(x)+3=36
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3(x)=33
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3 0
3 years ago
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Kipish [7]

Answer:

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Step-by-step explanation:


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3 years ago
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Rom4ik [11]

Answer:

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Step-by-step explanation:

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