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3 years ago

Hi can someone please help me?

1 answer:

4 0

Both can be right because if the function goes up, turns and goes down, between x = -2 and x = 2, it can happen that f(-2) = f(2) and then the average rate of change is [f(2) - f(-2)] / [2-(-2)] which is 0/4 = 0.

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55 is 40% of what number?

Vika [28.1K]

Assume that 40 percent of X is 55
This means X (40 / 100) = 55 
0.4 X = 55 
X = 55 / 0.4 
X = 137.5 
55 is 40 percent of 137.5

6 0

2 years ago

Read 2 more answers

Identify the slope, y-intercept, and x-intercept of the graph of the linear equation. Show your work. −2x + y = 4

sashaice [31]

The answer is y = 2x + 4
add 2x to 4

7 0

3 years ago

From a population of 500 elements, a sample of 225 elements is selected. It is known that the variance of the population is 900.

Valentin [98]

Answer:

standard error of the mean (S.E) = 0.06

Step-by-step explanation:

Explanation:-

Given sample size 'n' = 500

Given variance of the Population = 900

The standard deviation of the Population = √900 = 30

The standard error of the mean is determined by

$S.E = \frac{S.D}{\sqrt{n} } = \frac{30}{500} = 0.06$

8 0

2 years ago

What is the area of the shaded trapezoid?

vesna_86 [32]

Answer:

117 cm²

Step-by-step explanation:

4 cm + 4 cm = 8 cm

17 cm - 8 cm = 9 cm

5 0

2 years ago

Factor the polynomial expression 3x² + 2.

mel-nik [20]

Answer:

$\boxed{\left(x+i\sqrt{\frac{2}{3}}i \right)\left(x-i\sqrt{\frac{2}{3}}i \right)}$

Step-by-step explanation:

Setting the expression equal to zero to find the roots,

$3x^2 +2=0\\\\3x^2 =-2\\\\x^2 =-\frac{2}{3}\\\\x=\pm i\sqrt{\frac{2}{3}}$

This means that

$3x^2 +2=\boxed{\left(x+i\sqrt{\frac{2}{3}}i \right)\left(x-i\sqrt{\frac{2}{3}}i \right)}$

5 0

1 year ago