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2 years ago

I can’t figure this out I need the answer

Mathematics

1 answer:

fredd [130]2 years ago

7 0

Answer:

Area 2 = 72 cm²
CD = 7 cm

Step-by-step explanation:

For similar figures, side lengths (and any other linear measure) are proportional. Areas are proportional to the square of the scale factor for side lengths.

Perimeter 1/Perimeter 2 = CD/EF

21/18 = CD/6

CD = 6(21/18)

CD = 7 . . . cm

Area 2/Area 1 = (Perimeter 2/Perimeter 1)²

Area 2/98 = (18/21)²

Area 2 = 98(6/7)²

Area 2 = 72 . . . cm²

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What ratio forms a proportion with 14/42? A. 1/4 B. 7/21 C. 12/40 D. 28/80

koban [17]

Hey there!

"What ratio forms a proportion with $\frac{14}{42}$ ?"

- $\frac{14}{45} =0.56$ (for the decimal)

$A) \frac{1}{4}$ $=0.25$ $(incorrect)$
$B) \frac{7}{21}$ $=0.33$ $(Incorrect)$
$C) \frac{12}{40}$ $0.3$ $(incorrect)$
$D) \frac{28}{80}$ $0.7$ $(incorrect)$

But in order for you to solve this particular equation you'd have to go in with two (like multiplying by two)

$1\times2= 2$ ; $4\times2 = 8$ $(incorrect)$
$7\times 2= 14$ ; $21\times2 = 42$ $(correct)$
$12 \times2 = 24$ ; $40\times 2 = 80$ $(incorrect)$
$2 \times 28 = 56$ ; $2\times 80 = 160$ $(incorrect)$

Your result: $\boxed{Answer: B. \frac{7}{21} }$

Good luck on your assignment and enjoy your day!

~ $\bold{LoveYourselfFirst:) }$

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3 years ago

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