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lakkis [162]
2 years ago
5

Find the percent of change. Round your answer to the nearest tenth of a percent, if

Mathematics
1 answer:
kozerog [31]2 years ago
8 0

Answer: a. 14% decrease or 86% of the whole

B. 137.5% increase

Step-by-step explanation:

A. Divide new price by old price and you get .86, change that to a percent by multiplying by 100. That equals 86%, the percent of change would be the difference of 100% to 86%, which is 14%

B. Use above explanation but don’t find the difference. 77/56= 1.375, 1.375*100=137.5

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Solve the following equation for n 18n^2-50=0
Firdavs [7]

18n^2-50=0\ \ \ |+50\\\\18n^2=50\ \ \ |:18\\\\n^2=\dfrac{50}{18}\\\\n^2=\dfrac{50:2}{18:2}\\\\n^2=\dfrac{25}{9}\to n=\pm\sqrt{\dfrac{25}{9}}\\\\n=\pm\dfrac{\sqrt{25}}{\sqrt{9}}\\\\\boxed{n=-\dfrac{5}{3}\ \vee\ n=\dfrac{5}{3}}

Used:\\\sqrt{\dfrac{a}{b}}=\dfrac{\sqrt{a}}{\sqrt{b}}

3 0
3 years ago
The ratio of one lengths of corresponding sides of two similar hexagons is 4:7. Find the ratios of their PERIMETERS.
faust18 [17]

9514 1404 393

Answer:

  4 : 7

Step-by-step explanation:

The ratio of perimeters is exactly the same as the ratio of side lengths. Multiplying each side by 7/4 multiplies the sum of the sides by 7/4.

The ratio of perimeters is 4 : 7.

3 0
2 years ago
Find the x and y intercept for -2x-5y=30
Ahat [919]

Answer:

see below

Step-by-step explanation:

-2x-5y=30

To find the x intercept, set y =0 and solve for x

-2x-5*0=30

-2x = 30

Divide each side by -2

-2x/-2 = 30/-2

x =-15

To find the y intercept, set x =0 and solve for y

-2*0-5y=30

-5y = 30

Divide each side by -5

-5y/-5 = 30/-5

y = -6

3 0
3 years ago
Read 2 more answers
Please help!!!!!!!!!!!
IRISSAK [1]

Answer:

15

Step-by-step explanation:

4 0
3 years ago
I might kinda go to summer school so help?
bearhunter [10]

Answer:

I think it is A

Step-by-step explanation:

ust remember to divide the diameter by two to get the radius. If you were asked to find the radius instead of the diameter.

8 0
3 years ago
Read 2 more answers
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