4 years ago

#5 A pair of jeans was 30% off the

Mathematics

1 answer:

just olya [345]4 years ago

8 0

Answer:

Step-by-step explanation:

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3 less than twice a number x

serg [7]

3 less than twice a number x.

Twice a number would be the x multiplied by 2, and 3 less would be 3 subtracted by 2*x.

2x-3 <- The numeral form.

I hope this helps!
~kaikers

8 0

4 years ago

In a prior sample of U.S. adults, the Center for Disease Control (CDC), found that 8% of the people in this sample had pinworm b

kow [346]

Answer: a) 453 b) 1537

Step-by-step explanation:

As per given , we have

Margin of error : E= 0.025

Critical value for 95% confidence interval : $z_{\alpha/2}=1.96$

a) The prior estimate of population proportion : p=0.08

Required sample size :-

$n=p(1-p)(\dfrac{z_{\alpha/2}}{E})^2\\\\=0.08(1-0.08)(\dfrac{1.96}{0.025})^2\\\\=452.386816\approx453$

The minimum sample size is 453 U.S. adults.

b) Since the prior estimate of population proportion is not available , so we take p= 0.5

Required sample size :-

$n=0.5(1-0.5)(\dfrac{z_{\alpha/2}}{E})^2\\\\=0.25(\dfrac{1.96}{0.025})^2\\\\=1536.64\approx1537$

The minimum sample size is 1537 U.S. adults.

5 0

4 years ago

If 3(x-1) – 2(x-1)=7 , then the value of (x-1) is<br> (A)6<br> (B)7<br> (C)8<br> (D)9

jenyasd209 [6]

Answer:

(D)9

Step-by-step explanation:

8 0

4 years ago

Helpppppppppppppppppppp

olchik [2.2K]

-4x + 10y = -4
10y = 4x - 4
y = 2/5 x - 2/5 so slope = 2/5

-2 - 2x = 5y
5y = -2x - 2
y = -2/5 x - 2/5 so slope = -2/5

the slope is opposite so the lines are intersecting

answer is A.

7 0

3 years ago

Hello can you please help me with this question

rusak2 [61]

Answer:

Step-by-step explanation:

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4 0

2 years ago

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