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Airida [17]
3 years ago
11

10 & 11 WILL GIVE BRAINLIST

Mathematics
2 answers:
soldier1979 [14.2K]3 years ago
8 0

Answer:

D.

Step-by-step explanation:

(g-f)(x) ➡ g(x) - f(x)

9x {}^{3}  - 4 {x}^{2}  + 10x - 55 - (4 {x}^{3}  + 3 {x}^{2}  - 5x + 20)

➡

9 {x}^{3}  - 4 {x}^{2}  + 10x - 55 - 4 {x}^{3}  - 3 {x}^{2}  + 5x - 20

➡add the like terms

5 {x}^{3}  - 7 {x}^{2}  + 15x - 75

ra1l [238]3 years ago
3 0

Answer:

10)$38.50

11)D

Step-by-step explanation:

10) n = no. of rides

f(n) + g(n) = 1 + 2.5n

when n=15, 1 + 2.5(15)

= $38.50

11)f(x) = 4x³+3x²-5x+20

g(x) = 9x³-4x²+10x-55

(g-f)(x)=9x³-4x²+10x-55-(4x³

+3x²-5x+20)

= 9x³-4x²+10x-55-4x³

-3x²+5x-20

= 5x³-7x²+15x-75

(Correct me if i am wrong)

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Answer:

Part A: 108

Part B: 125

Part C: 1.71 x 10^-4

Part D: 0.2

Part E: 0.040

Sorry for the wait, laptop is being slow :/

I hope this helps.

4 0
3 years ago
Holly has watched 39% of a movie that is 122 minutes long.
Scilla [17]

9514 1404 393

Answer:

  48 minutes

Step-by-step explanation:

39% of 122 is ...

  0.39 × 122 = 47.58 ≈ 48

Holly has watched about 48 minutes of the movie.

3 0
3 years ago
Violet's mother ordered 60.5 yards of satin cloth for her boutique. If she has already used 25.42 yards of the cloth, how much c
suter [353]

Answer:

C.) 35.08 is the answer

Step-by-step explanation:

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3 0
2 years ago
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Is the following relation a function? <br><br> A. Yes<br> B. No
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6 0
3 years ago
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A human resources representative claims that the proportion of employees earning more than $50,000 is less than 40%. To test thi
bearhunter [10]

Answer:

The statistic for this case would be:

z=\frac{\hat p -p_o}{\sqrt{\frac{\hat p(1-\hat p)}{n}}}

And replacing we got:

z= \frac{0.436-0.4}{\sqrt{\frac{0.436*(1-0.436)}{700}}}= 1.92

Step-by-step explanation:

For this case we have the following info:

n =700 represent the sample size

X= 305 represent the number of employees that earn more than 50000

\hat p=\frac{305}{700}= 0.436

We want to test the following hypothesis:

Nul hyp. p \leq 0.4

Alternative hyp : p>0.4

The statistic for this case would be:

z=\frac{\hat p -p_o}{\sqrt{\frac{\hat p(1-\hat p)}{n}}}

And replacing we got:

z= \frac{0.436-0.4}{\sqrt{\frac{0.436*(1-0.436)}{700}}}= 1.92

And the p value would be given by:

p_v = P(z>1.922)= 0.0274

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3 years ago
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