All categories

2 years ago

Which is a translation of "two times the difference of a number and 7"

Mathematics

2 answers:

Burka [1]2 years ago

6 0

The answer is 2(x-7)
Hope this helps and good luckkk :)

fomenos2 years ago

6 0

Answer:

2(3*2)

Step-by-step explanation:

sorry if its wrong

You might be interested in

Solve for h:<br> v = 2rh

grandymaker [24]

Answer:

h=v/2r

Step-by-step explanation:

v = 2rh

Divide from one side to get h alone and you get the answer.

4 0

2 years ago

Paul invited 221 people to a party. All but 33 people accepted. All but 4 of those who accepted actually attended. Half of the p

poizon [28]

Answer: 426

Step-by-step explanation:

221 - 33 = 288

288 - 4 = 284

284 / 2 = 142

284 + 142 = 426

6 0

2 years ago

A sample size must be determined for estimating a population mean given that the confidence level is % and the desired margin o

Sauron [17]

Complete Question

The complete question is shown on the first uploaded image

Answer:

$n =290$

$n =129$

The correct option is D

Step-by-step explanation:

From the question we are told that

The margin of error is $E = 0.23$

The largest value is k = 15

The smallest value is u = 7

From the question we are told the confidence level is 95% , hence the level of significance is

$\alpha = (100 - 95 ) \%$

=> $\alpha = 0.05$

Generally from the normal distribution table the critical value of $\frac{\alpha }{2}$ is

$Z_{\frac{\alpha }{2} } = 1.96$

Generally population standard deviation estimate is mathematically represented as

$\sigma = \frac{Range }{4}$

Here the Range is mathematically represented as

$Range = k - u$

=> $Range = 15 - 7$

=> $Range = 8$

=> $\sigma = \frac{8 }{4}$

=> $\sigma = 2$

Generally the sample size is mathematically represented as

$n = [\frac{Z_{\frac{\alpha }{2} } * \sigma }{E} ] ^2$

=> $n = [1.96 * 2 }{0.23} ] ^2$

=> $n =290$

Generally to obtain a conservatively small sample size the population standard deviation estimate becomes

=> $\sigma = \frac{Range }{6}$

=> $\sigma = \frac{8 }{6}$

=> $\sigma =1.333$

Generally the conservatively small sample size is mathematically evaluated as

$n = [\frac{Z_{\frac{\alpha }{2} } * \sigma }{E} ] ^2$

=> $n = [1.96 * 1.333 }{0.23} ] ^2$

=> $n =129$

6 0

2 years ago

Write 2.5896 X 10° in standard notation.

Blababa [14]

Answer:

2.5896

Explanation:

Zero power rule: The zero exponent rule states that any number raised to a power of zero equals one.

10^0 is 1, so nothing changes

8 0

2 years ago

A birdbath is filled to the top. On Day 1, the volume of water in the bowl decreases by 7/8 cup. On Day 2, the volume in the bow

Romashka-Z-Leto [24]

Answer:

-1 5/8

Step-by-step explanation:

Let the total amount in the bowl be x;

If on Day 1, the volume of water in the bowl decreases by 7/8 cup, the remaining water will be;

x - 7/8

If on day 2, the volume in the bowl decreases by 3/4 cup, the remaining volume of water after the second day will be;

= x - 7/8 - 3/4

= x - (7-2(3))/8

= x - (7+6)/8

= x - 13/8

This shows that the total change after the two days is -13/8

As a mixed fraction;

-13/8 = -1 5/8

7 0

2 years ago