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2 years ago

Help please asap!!! Thx

Mathematics

1 answer:

Lostsunrise [7]2 years ago

8 0

Answer:

Step-by-step explanation:

# 21.

$\frac{8}{15}$ ÷ ( - 0.35 ) = - $\frac{8}{15}$ ÷ $\frac{35}{100}$ = - $\frac{8}{15}$ ÷ $\frac{7}{20}$ = - $\frac{8}{15}$ × $\frac{20}{7}$ = - $\frac{32}{21}$ (B).

# 22.

( $3\frac{1}{2}$ - $9\frac{3}{4}$ ) ÷ ( - 2.5 )

$3\frac{1}{2}$ = $3\frac{5}{10}$ = 3.5

$9\frac{3}{4}$ = $9\frac{3*25}{4*25}$ = $9\frac{75}{100}$ = 9.75

( 3.5 - 9.75 ) ÷ ( - 2.5 ) = ( - 6.25 ) ÷ ( - 2.5 ) = 2.5 (D).

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