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4 years ago

I don’t think I’m doing the top correctly. Could you help 7-10?

Mathematics

1 answer:

natta225 [31]4 years ago

8 0

a trapezoid

equation for area = h(a +b) ÷ 2

so you sub that in

8(9 +21) ÷ 2 = 8 × 30 ÷ 2 = 120

so the area is 120cm

A trapezoid

equation for area = h(a +b) ÷ 2

so you sub that in

6(9 + 5 ) ÷ 2 = 6 × 14 ÷ 2 = 42

So the answer is 42 inches

A kite

equation for area = p× q ÷ 2

so you sub that in

(3+3)×(4.5+6.5) ÷ 2 = 6×11÷2 = 3

So the answer is 33 cm

sorry I can't see 10s measurements

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10 to the negative 3 + 10 to the 4th power

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3 years ago

What is the greatest common factor of 35b^2,15b^3 and 5b?

xz_007 [3.2K]

ANSWER

The greatest common factor is 5b.

EXPLANATION

The first expression can be rewritten as

$35 {b}^{2} = 5 \times 7 \times {b}^{2}$

The second expression is rewritten as

$15 {b}^{3} = 3 \times 5 {b}^{3}$

The third expression is

$5b = 5 \times b$

The greatest common factor is the product of the least powers of the common factors.

$GCF=5 \times b = 5b$

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3 years ago

The diameter of a semicircle is 6 kilometres. What is the semicircle's radius?

bixtya [17]

Answer:

3km

Step-by-step explanation:

d = 2r so r = 1/2 * d = 1/2 * 6 = 3km

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2 years ago

One week, Eli covered 7 miles on his pogo stick in 224 minutes. Another week, he bounced 12 miles in 384 minutes. What is the nu

blsea [12.9K]

Answer: The answer is 32

Check Your Work:

7 times 32 is 224

12 times 32 is 384.

Hope this helps! :)

4 0

4 years ago

(2/5 + 4/9 - 2/3) multiplied by 5/2 - 3/5

Aloiza [94]

Answer:

Step-by-step explanation:

Least common denominator of 5 , 9 , 3 = 45

$\frac{2}{5}+\frac{4}{9}-\frac{2}{3}=\frac{2*9}{5*9}+\frac{4*5}{9*5}-\frac{2*15}{3*15}\\\\=\frac{18}{45}+\frac{20}{45}-\frac{30}{45}\\\\= \frac{18+20-30}{45}\\\\= \frac{8}{45}\\\\$

Least common denominator of 2, 5 = 10

$\frac{5}{2}-\frac{3}{5}=\frac{5*5}{2*2}-\frac{3*2}{5*2}\\\\=\frac{25}{10}-\frac{6}{10}\\\\=\frac{25-6}{10}\\\\= \frac{19}{10}$

$(\frac{2}{5}+\frac{4}{9}-\frac{2}{3})*(\frac{5}{2}-\frac{3}{5})=\frac{8}{45}*\frac{19}{10}\\\\= \frac{4*19}{45*5}\\\\= \frac{76}{225}$

7 0

3 years ago