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3 years ago

4.

Mathematics

1 answer:

Sergeu [11.5K]3 years ago

8 0

Answer:

Step-by-step explanation:

Basically they are saying that after you ADDED on 4 people it became 28. So in order to get 28 you had to add on 4 to the original number of people. Therefore it is n + 24 = 28

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There are 99 males and 121 females participating in a marathon. What percent of the participants are female?

ioda

To do this, we first want to see how many participants there are in total by adding both males and females.

$99+121=220$

Now we know that there were 220 total participants, but only 121 were females.

This allows us to set up the fraction 121/220= the percent female.

$\frac{121}{220} =0.55$

or 55%

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3 years ago

How many seasons old is Darla if she is 24 years old?

Natalija [7]

She would be 6 seasons old since there are 4 seasons in a year
6•4=24
I believe that would be the answer

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4 years ago

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Factor. x2+3x−18 Enter your answer in the parentheses x2+3x−18= ( )( )

Ostrovityanka [42]

X^2 + 3x - 18

2 numbers that multiplied give you -18
Those same 2 numbers have to add up to 3

6 x -3 = -18
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3 years ago

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The ratio of cars to trucks is 3 to 2 in one parking lot

oksano4ka [1.4K]

Answer:

Step-by-step explanation:

$\frac{x}{14} =\frac{3}{2} \\x=\frac{3}{2} \times 14=21$

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3 years ago

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In the diagram, a building cast a 35-ft shadow and a flagpole casts an 8-ft shadow. If the the flagpole is 18 ft tall, how tall

xxTIMURxx [149]

Answer: 78.8 ft

Step-by-step explanation:

Similar triangles have proportional sides.

$\dfrac{\text{building shadow}}{\text{building height}}=\dfrac{\text{flagpole shadow}}{\text{flagpole height}}\\\\\\\dfrac{35}{\text{building height}}=\dfrac{8}{18}\\\\\\\dfrac{35\times 18}{8}=\text{building height}\\\\\\\dfrac{35\times 9}{4}=\text{building height}\\\\\\\dfrac{315}{4}=\text{building height}\\\\\\\boxed{78.75=\text{building height}}$

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3 years ago