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3 years ago

7 2/5= 2/3x -4 1/2 plz helpp

Mathematics

1 answer:

Lera25 [3.4K]3 years ago

5 0

Answer:

3 :)

Step-by-step explanation:

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How do I solve this question?

Alex17521 [72]

8,000 x 10.5% = $840
840 x 7years= 5880
840 dollars taken each year for sever years.

8,000+ 5880= 13880 final answe

4 0

3 years ago

A survey conducted in July 2015 asked a random sample of American adults whether they had ever used online dating (either an onl

Natasha2012 [34]

Answer:

The 99% confidence interval is (0.0787, 0.1613).

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of \pi, and a confidence interval 1-\alpha, we have the following confidence interval of proportions.

$\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}$

In which

Z is the zscore that has a pvalue of $1 - \frac{\alpha}{2}$ .

For this problem, we have that:

The survey included 411 adults between the ages of 55 and 64, and 50 of them said that they had used online dating. This means that $n = 411, \pi = \frac{50}{411} = 0.12$

The 99% confidence interval is

So $\alpha = 0.01$ , z is the value of Z that has a pvalue of $1 - \frac{0.01}{2} = 0.995$ , so $Z = 2.575$ .

The lower limit of this interval is:

$\pi - z\sqrt{\frac{\pi(1-\pi)}{411}} = 0.12 - 2.575\sqrt{\frac{0.12*0.88}{411}} = 0.0787$

The upper limit of this interval is:

$\pi + z\sqrt{\frac{\pi(1-\pi)}{411}} = 0.12 + 2.575\sqrt{\frac{0.12*0.88}{411}} = 0.1613$

The 99% confidence interval is (0.0787, 0.1613).

3 0

4 years ago

If the range of the function f(x)=x4 is {28, 30, 32, 34, 36}, what is its domain?

Anna007 [38]

Range is ouutput from inputing the input
domain is input

f(x)=4x
28=4x, x=7
30=4x, x=15/2
32=4x, x=8
34=4x, x=17/2
36=4x, x=9

domain is {7,15/2, 8, 17/2, 9}

4 0

4 years ago

K12 help??? 3.12 Congruence and Rigid Motions

Kryger [21]

Congruent because you can map the triangles using a reflection across the y-axis which is a rigid motion

7 0

3 years ago

Read 2 more answers

In the Mississippi River Delta, fresh water (0% salinity) mixes with salt water from the Gulf of Mexico (3 1 2% salinity). If 1,

Rina8888 [55]

Answer:

The total resulting gallons of water is 4,000 gallons

The concentration of the resulting solution is 2.625% salinity

Step-by-step explanation:

The salinity of the fresh water from the Mississippi River Delta = 0%

The salinity of the water from the Gulf of Mexico = 3 1/2%

Therefore, if 1,000 gallons of river water mixes with 3,000 gallons from the Gulf, we have;

The total resulting gallons of water = 1,000 + 3,000 = 4,000 gallons

The total resulting gallons of water = 4,000 gallons

The concentration of the resulting solution is found as follows;

The concentration of the resulting solution = (3 × 3 1/2)/400 × 100 = 2.625%

The concentration of the resulting solution = 2.625% salinity.

8 0

3 years ago