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jarptica [38.1K]
3 years ago
5

The sides of a triangle are in the ratio 3 : 4 : 5. What is the length of each side if the perimeter of the triangle is 90 cm

Mathematics
1 answer:
svet-max [94.6K]3 years ago
7 0
The sides of the triangle are 3x, 4x and 5x

3x + 4x + 5x = 90
12x = 90
x = 90/12
x = 7.5

first side = 3x = 3 * 7.5 = 22.5 cm
second side = 4x = 4 * 7.5 = 30 cm
third side = 5x = 5*7.5 = 37.5 cm
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A class of 28 students has 12 girls. What is the ratio of girls to boys
DochEvi [55]

Answer:

3 girls for every 4 boys

Step-by-step explanation:

Number of girls = 12

Number of boys = 28 - 12 = 16

The ratio of girls / boys = 12/16 = 3/4

8 0
3 years ago
Arrange the steps to perform this subtraction operation in the correct order.
taurus [48]

Answer:

=1.23*10^6

Step-by-step explanation:

We have to calculate

(1.93*10^7 )-(9.7*10^6)

In order to add or subtract two numbers in scientific notation, we have to make sure that the power of exponents in both numbers is same.

We have to reduce the power of 10 in first number from 7 to 6

So,  

Step 1:

1.93*10^7=1.93*10*10^6

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Now,

Step 2:

=(1.93*10^7 )-(9.7*10^6 )

= 10.93*10^6- 9.7*10^6

Step 3:

=(10.93-9.7)*10^6

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7 0
4 years ago
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Holly checked her answer to a division problem by estimating the quotient. Which is the best estimation of the quotient?
Andre45 [30]
Answer: 4

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5 0
3 years ago
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Can someone pls help, I'll answer your questions if you have any.
Pie
There are no pictures I see you can text me on insta if you need help original_loredo
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3 years ago
Simplify this algebraic expression.<br><br> 9k + 7 - K + 4 =
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Answer:

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3 years ago
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