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Dvinal [7]
3 years ago
9

Kelly bought a book of 20 stamps. She has used 80% of them. A. How many stamps has Kelly used? B. How many stamps does she have

left?
Mathematics
2 answers:
ser-zykov [4K]3 years ago
8 0
Hello there the answer is 110
jok3333 [9.3K]3 years ago
4 0
80% of 20 is 80/100 x 20 = 16

So, kelly has used 16 stamps, and has 4 left
You might be interested in
What is the surface area of this right prism?
Amiraneli [1.4K]

Answer:

Since the 'base' and 'top' of any prism have the same shape, the surface area can be found by

surface area of prism = 2 * area of base + perimeter of base * H

So for the rectangular prism in your example..

surface area = 2LW + 2(L+W)H

= 2 * 7 * 4 + 2*(7+4)*5

= 56 + 2 * 11 * 5

= 56 +110

= 166 sq cm

Hope this helps

5 0
2 years ago
Trey is solving his equation, and the last line of his work is "-2 = 2". What does this mean?
oksian1 [2.3K]

Answer:

it means that his equation is not true.

Step-by-step explanation:

-2=2 is obviously incorrect, so we must assume that the equation isn't true.

3 0
3 years ago
The population of a certain country is approximated by the following equation, where x is the number of years since 1980 and P i
marissa [1.9K]

Answer:

In 2010 the population become 206,123,000.

Step-by-step explanation:

Consider the provided equation.

P=2.748x + 126.199

Where P represents the population in millions.

We need to determine the year in which the country had population of 206,123,000.

As P is in millions so divide 206,123,000 by one million.

\frac{206,123,000 }{1,000,000}= 206.123

Substitute P = 206.123 in above equation.

206.123=2.748x + 126.199

79.924=2.748x

x=\frac{79.924}{2.748}

x=29.08

30 year from 1980 the population become 206,123,000.

In 2010 the population become 206,123,000.

6 0
2 years ago
9/7 x (-9/5)<br> please help!
skelet666 [1.2K]

Answer: -81/35

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
X + 7у = 23 3х + 14у = 48​
Lelechka [254]

Answer:

x + 7у = 23 3х + 14у = 48​

Step-by-step explanation:

x + 7у = 23 3х + 14у = 48​

8 0
2 years ago
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