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2 years ago

7

8 decreased by the difference of t and 4

1 answer:

Zina [86]2 years ago

8 0

Answer:

See below.

Step-by-step explanation:

(t-4)-8

Remove parenthesis.

t-4-8

Combine like terms.

t-12

-hope it helps

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2+2=x<br><br> a.3<br> b.9<br> c,5<br> d.4

zavuch27 [327]

Answer:

D. 4

Step-by-step explanation:

2 + 2 = 4

7 0

3 years ago

A study conducted by the Center for Population Economics at the University of Chicago studied the birth weights of 623 babies bo

Margaret [11]

Answer:

The estimation for the number of newborns who weighed between 1724 grams and 5172 grams is 595.

Step-by-step explanation:

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the zscore of a measure X is given by:

$Z = \frac{X - \mu}{\sigma}$

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this problem, we have that:

$\mu = 3448, \sigma = 862$

Proportion of newborns who weighed between 1724 grams and 5172 grams.

This is the pvalue of Z when X = 5172 subtracted by the pvalue of Z when X = 1724. So

X = 5172

$Z = \frac{X - \mu}{\sigma}$

By the Central Limit Theorem

$Z = \frac{X - \mu}{s}$

$Z = \frac{5172 - 3448}{862}$

$Z = 2$

$Z = 2$ has a pvalue of 0.9772

X = 1724

$Z = \frac{X - \mu}{s}$

$Z = \frac{1724 - 3448}{862}$

$Z = -2$

$Z = -2$ has a pvalue of 0.0228

0.9772 - 0.0228 = 0.9544

Estimate the number of newborns who weighed between 1724 grams and 5172 grams.

0.9544 out of 623 babies. SO

0.9544*623 = 595

The estimation for the number of newborns who weighed between 1724 grams and 5172 grams is 595.

5 0

3 years ago

Bill is golfing with three friends and can either buy generic golf tees that are packaged by the dozen or the higher quality Aer

natka813 [3]

Answer: at lease 8 packages of Aero flight tees.

Step-by-step explanation:

At least 10 golf tees for each member of his foursome = total of at least 4*10 = 40 tees.

2 packages of the generic golf tees, that are packaged by the dozen = 2*12 = 24 tees.

So, Bill must buy at least 16 Aero tees.

This means he must buy 8 pairs

7 0

3 years ago

1. 8x-x <br> solve <br> I NEED HELPPP ASAP

White raven [17]

Answer:

<h2>7x</h2>

Step-by-step explanation:

$8x-x\\\mathrm{Add\:similar\:elements:}\:8x-x=7x$

4 0

3 years ago

Read 2 more answers

The table shows all the possible outcomes for spinning the pointer of the spinner with four equal sized sections labeled 1–4 and

vladimir1956 [14]

Answer:

12.5%

Step-by-step explanation:

There are two types of spinners here and the outcome of them is independent. That means

P(odd number,C) = P(odd number) * P(C)

There are two odd numbers out of four numbers in the first spinner. The chance of odd number will be:

P(odd) = 2/(2+2)= 1/2= 50%

There are four letters and the desired outcome is C. The chance for C will be:

P(C)= 1/4= 25%

Then the chance will be:

P(odd number,C) = P(odd number) * P(C)

P(odd number,C) =50% * 25% = 12.5%

5 0

3 years ago

Read 2 more answers