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2 years ago

What do I type in all the yellow boxes?

Mathematics

2 answers:

Tasya [4]2 years ago

6 0

$\\ \rm\Rrightarrow y=x^2+4x+6$

put x=-2

$\\ \rm\Rrightarrow y=(-2)^2+4(-2)+6$

$\\ \rm\Rrightarrow y=4-8+6$

$\\ \rm\Rrightarrow y=-4+6$

$\\ \rm\Rrightarrow y=2$

iVinArrow [24]2 years ago

3 0

Answer:

1st blank: 4

2nd blank: -8

y=2

Step-by-step explanation:

-2²=4

4(-2)=-8

1 x 4 = 4

4 + -8 = -4

-4 + 6 = 2

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A random sample of 100 observations from a quantitative population produced a sample mean of 22.8 and a sample standard deviatio

natima [27]

Answer:

We conclude that the population mean is 24.

Step-by-step explanation:

We are given the following in the question:

Population mean, μ = 24

Sample mean, $\bar{x}$ = 22.8

Sample size, n = 100

Alpha, α = 0.05

Sample standard deviation, s = 8.3

First, we design the null and the alternate hypothesis

$H_{0}: \mu = 24\\H_A: \mu \neq 24$

We use Two-tailed z test to perform this hypothesis.

Formula:

$z_{stat} = \displaystyle\frac{\bar{x} - \mu}{\frac{s}{\sqrt{n}} }$

Putting all the values, we have

$z_{stat} = \displaystyle\frac{22.8 - 24}{\frac{8.3}{\sqrt{100}} } = -1.44$

We calculate the p-value with the help of standard z table.

P-value = 0.1498

Since the p-value is greater than the significance level, we accept the null hypothesis. The population mean is 24.

Now, $z_{critical} \text{ at 0.05 level of significance } = \pm 1.96$

Since, the z-statistic lies in the acceptance region which is from -1.96 to +1.96, we accept the null hypothesis and conclude that the population mean is 24.

7 0

3 years ago

Eggs are put in tray of 12, the trays are packed in boxes, each box contains 180 eggs. How many trays are in each box

s2008m [1.1K]

15

180/12=15.

That is the equation since we know the box has 180 eggs, and the eggs have to be separated into 12

4 0

3 years ago

How do you write 40.545 in word form

DiKsa [7]

Answer:

forty point five hundred forty-five

Step-by-step explanation:

7 0

3 years ago

Read 2 more answers

Find the value of w-9 given that –3w+5 = 2

melamori03 [73]

Answer:

$-8$

Step-by-step explanation:

Solving for $w$ given the equation, $-3w +5 = 2$ :

$-3w +5 = 2 \\ -3w +5 -5 = 2 -5 \\ -3w = -3 \\ \frac{-3w}{-3} = \frac{-3}{-3} \\ w = 1$

Solving for $w -9$ when $w = 1$

$1 -9 \\ -8$

3 0

2 years ago

What’s the equivalent expression

r-ruslan [8.4K]

Answer:

9 (2 a - 3)^2

Step-by-step explanation:

Simplify the following:

(6 a - 9)^2

Hint: | Factor out the greatest common divisor of the coefficients of 6 a - 9.

Factor 3 out of 6 a - 9:

(3 (2 a - 3))^2

Hint: | Distribute exponents over products in (3 (2 a - 3))^2.

Multiply each exponent in 3 (2 a - 3) by 2:

3^2 (2 a - 3)^2

Hint: | Evaluate 3^2.

3^2 = 9:

Answer: 9 (2 a - 3)^2

4 0

3 years ago