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2 years ago

Select all the expressions that are equivalent to 18 + 4(m − 3) + 4m.

Mathematics

2 answers:

shepuryov [24]2 years ago

7 0

Answer:

2(4m + 3)
8m + 6

Hope it helps

mixas84 [53]2 years ago

4 0

Answer:

A 2(4m + 3) Distribute 8m +6 match

C 8m + 6 This matches

Step-by-step explanation:

18 + 4(m − 3) + 4m

First distribute

18+ 4m -12 +4m

Then combine like terms

8m +6

Now see which expressions match

A 2(4m + 3) Distribute 8m +6 match

D 4(2m + 4) Distribute 8m + 16 no match

B 5m + 19 This does not have 8m no match

E 8m + 16 This does not have 6 as a constant no match

C 8m + 6 This matches

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D)) The ratio of the monthly income and expenditure of Sunayana is 5 : 3. If she

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Answer:

Sunayana's income is ₹25000 and expenditures are ₹15000.

Step-by-step explanation:

Let i denote the monthly income and e denote the expenditures.

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$\frac{i}{e}=\frac{5}{3}$

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Let's multiply both sides by $(e-3000)$ :

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Since we know that $i=\frac{5}{3}e$ , substitute:

$\frac{5}{3}e+5000=\frac{5}{2}(e-3000)$

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$\frac{5}{3}e+5000=\frac{5}{2}e-7500$

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Substitute 15000 for e. Evaluate:

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And we're done!

Edit: Wrong currency, sorry about that!

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