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2 years ago

Each music class sings 8 songs a week.how many songs does each class sing in 5 weeks 6 weeks 7 weeks

1 answer:

4 0

The answer is fairly simple. Each week they sing 8 songs, and so in 5 weeks they would sing 8x5 songs (which is 40) in 6 weeks, they would sing 8x6 songs (which is 48) and in 7 weeks 7x8 songs (which is 56)

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My friend elentire has either less than 15 totts or more than 23 totts. Graph the compound inequality

Fynjy0 [20]

Answer:

15 > x < 23

Step-by-step explanation:

If "x" is totts, then they have either 15 > x or x < 23, when you combine them, you put them in that order

15 > x x < 23

15 > x < 23

Best of luck!

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2 years ago

Solve for x 3x - 4 = 2x - 10 x = 14 x = 6 x = -6 x = -14

const2013 [10]

X=-6 is the correct answer

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2 years ago

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A model rocket is launched into the air from ground level.

Anon25 [30]

$p(x)=-16x^2+32x

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2 years ago

The population standard deviation for the heights of dogs, in inches, in a city is 3.7 inches. If we want to be 95% confident th

Aleks04 [339]

Answer:

The minimum sample size that can be taken is of 14 dogs.

Step-by-step explanation:

The formula for calculating the minimum sample size to estimate a population mean is given by:

$n=\frac{z^{2}\sigma^{2}}{e^{2}}$

The first step is obtaining the values we're going to use to replace in the formula.

Since we want to be 95% confident, $1-\alpha=0.95 \Rightarrow \alpha=0.05$ .

Therefore we look for the critical value $z_{\alpha/2}=1.96$ .

Then we calculate the variance:

$\sigma = 3.7 \Rightarrow \sigma^{2}=13.69$

And we have that:

$e=2 \Rightarrow e^{2}=4$

Now we replace in the formula with the values we've just obtained:

$n=\frac{1.96^{2}*13.69}{4}=13.1479\approx 14$

Therefore the minimum sample size that can be taken to guarantee that the sample mean is within 2 inches of the population mean is of 14 dogs.

6 0

2 years ago

X/19 = 4 what is x please help i don`t under stand this equation p.s. xover 19 =4

ivann1987 [24]

The answer is 76 i think

8 0

2 years ago