2 years ago

What number has the same value as 40 tens

Mathematics

1 answer:

MariettaO [177]2 years ago

6 0

Answer: 400 because 40 multiplied by ten equals 400 hundred, so basically it's just 40 multiplied by 10.

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Leona spent $22.95 at the mall. She bought a T-shirt and a book. The book $12.25. How much did the T-shirt cost?

dimaraw [331]

A) Let x = cost of t-shirt:

x= 22.95-12.25

B) x = 22.95 -12.25 = 10.70

C) the t-shirt cost $10.70

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2 years ago

Number of Text Messages a Day A random sample of n = 755 US cell phone users age 18 and older in May 2011 found that the average

Alexeev081 [22]

Answer:

The 95% confidence interval is (29.54 - 53.46}

Step-by-step explanation:

given data:

$\hat X = 41.5$

Se = 6.1

n = 755

a) best estimate $\hat x = 41.5$

b) at 95% confidence interval

$\alpha = 1- 0.95 = 0.05$

$\alpha /2 = 0.025$

$z_{\alpha/2} = z_{0.025} = 1.96$

at 95% confidence interval for [/tex]\mu[/tex]

$\hat x \pm z_{\alpha /2} \times Se$

$41.5 \pm 1.96\times 6.1$

$41.5 \pm 11.96$

The 95% confidence interval is (29.54 - 53.46}

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2 years ago

I need help what is -0.5 _ -0.2

Darya [45]

-0.5 < -0.2,
because I need more characters

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2 years ago

Solve the following system: (5 points)

dusya [7]

(4,7) because 3•4 = 12 and 12+7 = 19

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2 years ago

Can someone please help me with this please and thank you

Mama L [17]

Answer:

f(x)=7x

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1 year ago