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storchak [24]
3 years ago
6

What percent of 84 is 21

Mathematics
1 answer:
Yuri [45]3 years ago
7 0
84x/21 21/84x=1/4=0.25=25% first you have to divide 21 into 84 and get 0.25 you then move the dot to the right to the 5 and then you put the percent next to the 5
The answer is 25%
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4 Dean has a rectangular picture that is 6 inches long and
vredina [299]

Answer:

Step-by-step explanation:

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6(4-x)=4(5)

24-6x=20

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x=4/6

x=2/3

2/3 of an inch should be cut off the width.

3 0
3 years ago
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If a car travels 792 feet in 12 seconds what is the speed of the car in miles per hour?
UkoKoshka [18]

Answer:

Step-by-step explanation:

1 mile contains 5280 feet

x mile contains 792 feet             Cross Multiply

5280 x = 792                               Divide by 5280

x = 792 / 5280

x = 0.15 miles

1 hour = 3600 seconds

Distance travelled in 12 sec = 0.15 miles

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12x =  540                                                               Divide both sides by 12

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6 0
2 years ago
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Construct a right triangle whose perimeter is equal to 10cm and one acute angle is 60°
jok3333 [9.3K]
How can we help you with this?
5 0
3 years ago
Identifiy the initial amount a and the decay factor b in the exponential function y=5×0.5^×
xenn [34]

Answer:

a=5\\ \\b=0.5

Step-by-step explanation:

Given the exponential decay function y=5\cdot (0.5)^x

When x=0, then

y=5\cdot (0.5)^0=5\cdot 1=5,

so the initial amount is a=5

The exponential decay function y=a\cdot b^x has the decay factor b.

In your case, the eexponential decay factor is b=0.5

6 0
3 years ago
Help please thank you so much
krok68 [10]
Alright, so since 20/100=1/5, and 1/5 of 45=9, 20% off of 45=9 and 45-9=36 dollar sale. Since 30=30/100, we can divide 95 by 100 and multiply that by 30 to get 0.95*30=28.5. 95-28.5=66.5

Next, we need to find 8% of 36+66.5=102.5. 8=8/100, so we divide 102.5 by 100 and multiply it by 8, getting 1.025*8=8.2
6 0
3 years ago
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