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3 years ago

Expand or simplify 3c(5+c) -2(3c-7)

Mathematics

2 answers:

Luden [163]3 years ago

7 0

3c(5+c) -2(3c-7)
15c+3c^2-6c+14
9c+3c^2+14

ikadub [295]3 years ago

7 0

Answer:

It is 3c² + 9c + 14

Step-by-step explanation:

$3c(5 + c) - 2(3c - 7)$

open the brackets:

$= (15c + 3 {c}^{2} ) - (6c - 14) \\ = (15c + {3c}^{2} ) - 6c + 14$

express in quadratic equation:

$3 {c}^{2} + 9c + 14$

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Answer: 203

Step-by-step explanation:

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3 years ago

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dybincka [34]

Your answer is q = 2

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2 years ago

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Could someone help me understand how to solve this?

monitta

Answer:

Amount in 4% account: $550

Step-by-step explanation:

Use simple interest formula $I=P\cdot r\cdot t,$ where

I = interest

P = principal

r = rate (as decimal)

t = time.

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$P_1=x\\ \\r_1=0.04\\ \\t_1=1,$

then

$I_1=x\cdot 0.04\cdot 1=0.04x$

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$P_2=1,500-x\\ \\r_2=0.05\\ \\t_2=1,$

then

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3 years ago

Dori and Malory are tracking their steps taken as a health goal. Dori leaves her house at 12:00 p.m. and walks at 50 steps per m

gladu [14]

Let n = minutes since 12:00 pm when Malory catches up to Dori.

Dori travels
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(90 steps/min)*(n - 20 min) = 90n - 1800 steps

Equate the steps traveled by Dori and Malory.
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3 years ago

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Gre4nikov [31]

Answer:

Third option: 12x^2+8x+25

Step-by-step explanation:

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s3=8x+10

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Replacing s1, s2 and s3 in the formula above:

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3 years ago

Read 2 more answers

Expand or simplify 3c(5+c) -2(3c-7)​

Expand or simplify 3c(5+c) -2(3c-7)