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2 years ago

Which of the following is a perfect square? A. 18 B. 81 C. 50 D. 32

Mathematics

2 answers:

pantera1 [17]2 years ago

8 0

ANSWER-
The answer is 81 because 9x9 is 81

jeyben [28]2 years ago

7 0

Answer:81

Step-by-step explanation:

Because the square root of 81 is 9 which is a perfect square

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1 year ago

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The ratio of the number of boys to the number of girls in Ms. Zombo’s class is 3 to 4. The ratio of the number of boys to the nu

MAXImum [283]

Answer:

$\frac{51}{46}$

Step-by-step explanation:

Number of boys = B

Number of girls = G

Ratio of the number of boys to the number of girls in Ms. Zombo’s class = $\frac{3}{4}$

$\frac{B}{G}=\frac{3}{4}\\\Rightarrow B=G\frac{3}{4}$

$B+G=49\\\Rightarrow G\frac{3}{4}+G=49\\\Rightarrow G\frac{7}{4}=49\\\Rightarrow G=28$

$B=G\frac{3}{4}\\\Rightarrow B=28\frac{3}{4}\\\Rightarrow B=21$

Ratio of the number of boys to the number of girls in Mr. Stolarski’s class = $\frac{5}{3}$

$\frac{B}{G}=\frac{5}{3}\\\Rightarrow B=G\frac{5}{3}$

$B+G=48\\\Rightarrow G\frac{5}{3}+G=48\\\Rightarrow G\frac{8}{3}=49\\\Rightarrow G=18$

$B=G\frac{8}{3}\\\Rightarrow B=18\frac{5}{3}\\\Rightarrow B=30$

Total number of boys in combined class = 21+30 = 51

Total number of girls in combined class = 28+18 = 46

∴ Ratio of the number of boys to girls in the combined classes is $\mathbf{\frac{51}{46}}$

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2 years ago