2 years ago

3. Multiply a. (7a-b) (a +7b)

Mathematics

1 answer:

ser-zykov [4K]2 years ago

4 0

You already got the annswer but if you ever need math answers and or explanations asap use the app mathaway:)

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For the Christmas dance ,the dance committee needs three hours of music. Each song is an average of 3.5 minutes . how many song

GREYUIT [131]

An hour is 60 minutes

there are three hours so
60*3=180

how many times will 3.5 go into 180 so
180/3.5=51.43 or rounded up you get 52 songs (if they're good, they'll play 52 average songs and one half legnth songs)
so they will need 52 songs

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3 years ago

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Explain how you can use multiplication to find the quotient 3/5 divided by 3/15. then evaluate the expression.

umka21 [38]

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-1 3/7 • (-3 2/3) = ? A: 3 2/7 B: 5 5/21 C: 11 D: -5 5/21

Anna35 [415]

[|] Answer [|]

$\boxed{5 \ \frac{5}{21}}$

[|] Explanation [|]

$-1 \ \frac{3}{7}$ * $-3 \frac{2}{3}$

-----------

Convert Fractions To Mixed Numbers:

$-1 \ \frac{3}{7}$ = $\frac{-10}{7}$

$-3 \ \frac{2}{3}$ = $\frac{-11}{3}$

Multiply Across:

$\frac{-10 \ * \ -11}{7 * 3}$

= $\frac{110}{21}$

Simplify:

= $5 \ \frac{5}{21}$

$\boxed{[|] \ Eclipsed \ [|]}$

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