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ra1l [238]
3 years ago
5

Find f(-1) given f(x)=-3x^3+2x^2+24 Help me please

Mathematics
1 answer:
Talja [164]3 years ago
7 0
Answer: 23

If x=-1 then (-1) to the power of 3 = -1 and (-1) to the power of 2= 1

3(-1)^3= -3
2(-1)^2= 2
-3+2+25= 23
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A college student takes the same number of credits each semester. She had 8 credits when she started, and after 7 semesters, she
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Answer:

12 credits per semester

Step-by-step explanation:

she has 92 in the end but she started off with 8 so your first step is to subtract 8 from 92 which gives you 84 once you get 84 you divide that by 12 you get 7 which means she got 12 credits in each of her 7 semeters

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2 years ago
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The answer is number A
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3 years ago
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4 0
3 years ago
June bought three books. For the first book, she paid one half of her allowance plus $1 more. For the second book, she paid one
inysia [295]

Answer:

$34

Step-by-step explanation:

I'd work backwards.

For the third book, she paid all her remaining money. The problem says she paid "1/2 her leftover money + $3". This means that: (let m = money used to buy book 3)

m = 1/2m + 3

1/2m = 3

m = 6

For the second book: (let n = money before book 2)

n - m (money left after book 2) = 1/2n + 2

1/2n +2 is money used up for book, which is the same as n-m.

n = 1/2n + 2 + m

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1/2n =8

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For the first book, she spent 1/2 her money + 1. If o = money before book 1 (or the whole allowance):

o - n = 1/2o + 1

o = 1/2o + n + 1 = 1/2o + 16 + 1

1/2o = 17

o = 34

Check!

Spent 17 (half 34) + 1 on book 1

16 left

Spent 8 (half 16) +2 on book 2

6 left

Spent 3 (half 6) + 3 on book 3

0 left

4 0
3 years ago
Need some help on vertical adjacent complementary angles (algebraic)
dusya [7]

Step-by-step explanation:

(2c + 8) + (6c - 6) = 90 \\ 8c + 2 = 90 \\ 8c = 88 \\ c =  \frac{88}{8}  = 11

6 0
3 years ago
Read 2 more answers
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