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Lynna [10]
4 years ago
11

If f(x) = 1/3x^2 + 5, find f(-9). A. 248 B. -22 C. 11 D. 32

Mathematics
2 answers:
melamori03 [73]4 years ago
7 0

Answer:

D. 32

Step-by-step explanation:

For this problem, we simply plug -9 in for x in f(x):

f(x)=\frac{1}{3} x^2+5  ⇒  f(9)=\frac{1}{3} *(9^2)+5=\frac{1}{3} *81+5=27+5=32

Thus, the answer is D. 32.

Hope this helps!

anygoal [31]4 years ago
3 0

Answer:

D. 32

Step-by-step explanation:

f(-9) = ⅓(-9)² + 5

⅓(81) + 5

27 + 5

32

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Isaiah is saving 12$ per week from his allowance. after 20 weeks, Isaiah has 240$
dsp73

Answer: He saved $12 per week

Step-by-step explanation:

I am confused you basically solved your own question but here is the explanation.

Isaiah gets $12 per week in his allowance, every two weeks he gets $24, so in twenty weeks he would have save $240. Here is an equation.

2W*10 = $240

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7 0
3 years ago
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Answer:

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Step-by-step explanation:

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8 0
3 years ago
Tasha is five less than twice as old as his brother Nathan together their ages add up to 25 how old is Tasha and his brother Nat
Zolol [24]
2x-5=25
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2x-5+5=25+5
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Hope I helped!
6 0
3 years ago
If a and b are two angles in standard position in Quadrant I, find cos(a+b) for the given function values. sin a=4/5 and cos b=5
vladimir1956 [14]
First let's find the angles a and b.

 We have then:
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 a = Asin (4/5)
 a = 53.13 degrees.

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 We now calculate cos (a + b). To do this, we replace the previously found values:
 cos ((53.13) + (67.38)) = - 0.507688738
 Answer: 
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 Note: there is another way to solve the problem using trigonometric identities.
4 0
3 years ago
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algol13

Answer:13.84

Step-by-step explanation:

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