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Serga [27]
3 years ago
7

65% of 80 is what number

Mathematics
2 answers:
miskamm [114]3 years ago
8 0

Answer:

52

Step-by-step explanation:

We can find the percent of  a number by converting the percent to a decimal.

65%=0.65

80(0.65)=52

grigory [225]3 years ago
7 0

To find 65% of 80, first write 65% as a decimal by moving the decimal point 2 places to the left and we will get .65. Next, the word "of" means multiply, so we have (.65) (80) = 52.

Therefore, 65% of 80 is 52.

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The length of a rectangle is 10m greater than the width. The area is 24m^2
Ivan

Answer:

length: 12m

width: 2m

Step-by-step explanation:

24 = a*w

a = w+10

then:

24 = (w+10)w

24 = w*w + 10*w

24 = w² + 10w

0 = w² + 10 - 24

w = {-10±√((10²)-(4*1*-24))} / (2*1)

w = {-10±√(100+96)} / 2

w = {-10±√196} / 2

w = {-10±14} / 2

only positive numbers:

w = {-10+14}/2

w = 4/2

w = 2m

a = w+10

a = 2 + 10

a = 12m

Check:

24 = 12*2

5 0
4 years ago
17+(−8)+(−8)17, plus, left parenthesis, minus, 8, right parenthesis, plus, left parenthesis, minus, 8, right parenthesis.
ddd [48]

Answer:

-127

Step-by-step explanation:

17 + ( - 8) + ( - 8)17 \\ 17 - 8 + ( - 8)17 \\ 17 - 8 - 136 =  - 127

7 0
3 years ago
N°1. (1+1)x1-1 <br>N°2. (2+2)x 2-6​
Sveta_85 [38]

Step-by-step explanation:

do () first

2*1-1

then multiplication

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same reason as above

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8 0
3 years ago
What is 7.8 x 10^-3 in scientific notations
Lana71 [14]

Answer:

7.8 x 10^-3 is 0.0078. B

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4 years ago
ABC is a right angled triangle. If b=90 ac=96 c=30. What is ab?
inn [45]

Answer:

ab=48

Step-by-step explanation:

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