3 years ago

Pls answer these two questions

Mathematics

1 answer:

nlexa [21]3 years ago

4 0

Answer:

1. C

2. C

Hope This Helps!!!

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Shelly is 3 years older than Michelle. 4 years ago the sum of their ages was 67. find the age of each person now

Murljashka [212]

If Shelly is 3 years older than Michael and There 67. Michael is 64 and Shelly is 67. Or Michael is 67 and Shelly is 70.

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3 years ago

Is line BC parallel to DE? Choose the best justification.

Aleksandr [31]

Answer:

Step-by-step explanation:

The last one.

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3 years ago

The area of a compact disc is 452 4/7 square centimeters. What is the diameter of a compact disc ? Use 22/7 as an approximation

motikmotik

$\bf \textit{area of a circle}\\\\ A=\pi r^2~~ \begin{cases} r=radius\\ \cline{1-1} A=452\frac{4}{7} \end{cases}\implies 452\frac{4}{7}=\pi r^2\implies \cfrac{3168}{7}=\pi r^2 \implies \cfrac{3168}{7\pi }=r^2 \\\\\\ \stackrel{\pi =\frac{22}{7}}{\cfrac{3168}{7\cdot \frac{22}{7}}}=r^2\implies \cfrac{3168}{22}=r^2\implies 144=r^2\implies \sqrt{144}=r\implies 12=r \\\\[-0.35em] \rule{34em}{0.25pt}\\\\ ~\hfill \stackrel{diameter=2r}{d=24}~\hfill$