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AlladinOne [14]
3 years ago
5

What percent of 90 is 22.5?

Mathematics
2 answers:
mash [69]3 years ago
8 0
To find the percent of a certain number, we can treat it like we are solving for the percent of 100. In this case, you should do 22.5/90, which simplified is equal to 1/4. 1/4 as a percent is 25, which means that 22.5 is 25% of 90.
german3 years ago
3 0
22.5/90*100%=0.25*100%=25%
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vitfil [10]
Hello, 

4 is to 78 as x is to 100, we write it as a ratio:

\frac{4}{78}= \frac{x}{100}   \\  \\ x= \frac{100*4}{78}  \\  \\ \boxed{x= \frac{200}{39}=5.13}
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–9.45 + 5.4d + 9.01 = –0.1d + 0.66
bulgar [2K]

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1.838181818181818

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5.4d + 0.1d = 0.66 + 9.45

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One of the legs of a right triangle measures 9 cm and the other leg measures 11 cm.
ikadub [295]

Answer:

\boxed {\boxed {\sf 14.2 \ cm}}

Step-by-step explanation:

Since this is a right triangle, we can use the Pythagorean Theorem to solve for the sides.

a^2+b^2=c^2

where <em>a</em> and<em> b</em> are the legs and <em>c</em> is the hypotenuse. In this triangle, we know the legs are 9 centimeters and 11 centimeters, or:

  • a= 9 cm
  • b= 11 cm

Substitute these values into the formula.

(9 \ cm)^{2}  +(11 \ cm)^{2} =c^{2}

Solve the exponents.

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81 \ cm^{2}  +(11 \ cm)^{2} =c^{2}

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81 \ cm^{2}  +121 cm^{2} =c^{2}

Add the values on the left side.

202 \ cm^{2} =c^{2}

Since we are solving for c, we must isolate the variable. It is being squared and the inverse of a square is the square root. Take the square root of both sides.

\sqrt {202 \ cm^{2} }=\sqrt{c^{2} }

\sqrt {202 \ cm^{2} }=c

14.2126704036 \ cm =c

We are told to round to the nearest tenth.

  • 14.2<u>1</u>26704036

The 1 in the hundredth place tells us to leave the 2 in the tenth place.

14.2 \ cm= c

The hypotenuse is equal to <u>14.2 centimeters.</u>

3 0
3 years ago
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