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prisoha [69]
3 years ago
6

Evaluate the function. f(x) = –2x2 – 10.0 Find f(-5) Answer: Submit Answer

Mathematics
1 answer:
Wittaler [7]3 years ago
3 0

Answer:

f(-5) = 0

Step-by-step explanation:

Step 1: Define

f(x) = -2x² - 10x

f(-5) is x = -5

Step 2: Substitute and Evaluate

f(-5) = -2(-5)² - 10(-5)

f(-5) = -2(25) + 50

f(-5) = -50 + 50

f(-5) = 0

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3 years ago
Graph the equation m: 9x +3y=18
Ksivusya [100]
Rearrange the equation.
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Work out <br>a. 5 x 1/8<br><br>b.1/7 x 6 <br><br><br>plzz help ​
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Answer:

Step-by-step explanation:

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8 0
2 years ago
1. Find the 90% Cl for the population mean if sample
Elden [556K]

Answer:

The answer is below

Step-by-step explanation:

1)

mean (μ) = 12, SD(σ) = 2.3, sample size (n) = 65

Given that the confidence level (c) = 90% = 0.9

α = 1 - c = 0.1

α/2 = 0.05

The z score of α/2 is the same as the z score of 0.45 (0.5 - 0.05) which is equal to 1.65

The margin of error (E) is given as:

E=Z_{\frac{\alpha}{2} }*\frac{\sigma}{\sqrt{n} } =1.65*\frac{2.3}{\sqrt{65} } =0.47

The confidence interval = μ ± E = 12 ± 0.47 = (11.53, 12.47)

2)

mean (μ) = 23, SD(σ) = 12, sample size (n) = 45

Given that the confidence level (c) = 88% = 0.88

α = 1 - c = 0.12

α/2 = 0.06

The z score of α/2 is the same as the z score of 0.44 (0.5 - 0.06) which is equal to 1.56

The margin of error (E) is given as:

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8 0
3 years ago
6 text 3/4 of a minute what was his rate of texting
Ilya [14]

<em>Answer:</em>

<em>8</em>

<em>Step-by-step explanation:</em>

<em>6:0.75</em>

<em>0.75 divided by 0.75=1</em>

<em>6 divided by 0.75=8</em>

<em>8:1</em>

<em>Best,</em>

<em>SunflowerJada</em>

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3 years ago
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