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EastWind [94]
2 years ago
14

In a class of 20 students,12 were girls and the rest were boys

Mathematics
2 answers:
Ira Lisetskai [31]2 years ago
7 0
It’s definitely A (:
VARVARA [1.3K]2 years ago
4 0
A) 8/20 —>simplified as 2/5
b) 12/20 —> simplified as 3/5
c) 60% girls
4) 0.4 boys
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The level of the tide in a harbor changed from 9 1/4 ft to 4 1/2 ft above sea level over a period of 3 1/4 hr
kumpel [21]

Answer:

The answer is "\bold{- \frac{19}{13} \ / hour}"

Step-by-step explanation:

Please find the complete question in the attached file.

Calculating the difference of 9 \frac{1}{4}\ and \ 4 \frac{1}{2}  dividing the value by 3 \frac{1}{4}

\to 4 \frac{1}{2} - 9 \frac{1}{4}\\\\ \to  \frac{9}{2} - \frac{37}{4}\\\\  \to  \frac{18-37}{4} \\\\ \to -\frac{19}{4}\\\\\to -\frac{19}{4} \div \frac{13}{4}= -\frac{19}{4} \times \frac{4}{13} = -\frac{19}{13}\\

3 0
3 years ago
PLEASE HELP WILL GIVE BRAINLIEST the number of students at north middle school is 1240 and is decreasing by 25 students per year
Nikolay [14]

Answer:

-88

Step-by-step explanation:

Let N(x) be the number of students at NMS for a certain number of years.

Let S(x) be the number of students at SMS for a certain number of years.

Let x be the number of years.

N(x)=1240-25x

S(x)=800-30x

When # of students is equal, N(x)=S(x). Therefore, we are looking for the value of x (# of years) when 1240-25x=800-30x

Subtract 1240 from each side

-25x=-440-30x

Add 30x

5x=-400

x=-88 years

Check your numbers.

6 0
3 years ago
I need help please.
enot [183]

Answer:

The answer is D. 2

Step-by-step explanation:

exponential form

exponents equal

move constant to the right

subtract the number

divide both sides by 2

6 0
3 years ago
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LekaFEV [45]

Answer:

The answer would be 20 weeks

Step-by-step explanation:

Because, if she makes $5 per week you would just divide 100 by 5 and get 20 and to check you would multiply your answer to see if it equals the amount he/she would want to amount to. Hope this helps! Happy learning!

5 0
3 years ago
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8 0
3 years ago
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