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3 years ago

Please help don’t understand

Mathematics

1 answer:

TEA [102]3 years ago

8 0

Answer:

$3b+9n-8$

Step-by-step explanation:

Combine like terms:

$7b+8n-4b-8+n=3b+8n-8+n$

Combine like terms:

$3b+8n-8+n=3b+9n-8$

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3 years ago

Dan and Luke are running in a 20 mile charity benefit wrist if Dan runs at 3 miles per hour and Luke runs at 4 miles per hour ho

Nimfa-mama [501]

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Step-by-step explanation:

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3 years ago

When you can walk to miles in 30 minutes how many miles can she walk in two hours

djyliett [7]

Easey

ratio and proprotion

or
knowlege

1. ratio and proportion
distance/time=2/30

2hours=60*2=120mins
xdistance
2/30=x/120
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times boht sides by 120
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3 0

3 years ago

Factor 15z^2+17z-18 please show work

siniylev [52]

There is no common factor between 15, 17 and 18 because 17 is prime.

15z² +17z - 18 =

d = 17² - 4.15.-18

d = 289 + 1080

d = 1369

z = (-17 +/- \/1369) : 2 * 15

z = (-17 + 37) : 30

z' = 20 : 30 = 2/3

z" = (-17 - 37) : 30

z" = -54 : 30 = -1.8

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7 0

3 years ago

Two students, Carlos and Sophie, factored the trinomial -4x2 − 10x + 6. Sophie factored it as -2(2x − 1)(x + 3) and Carlos facto

damaskus [11]

Sophie has factored the term completely while Carlos has not factored the term completely.

Step-by-step explanation:

We need to factor the trinomial:

$-4x^2-10x + 6$

Factoring:

$-4x^2-10x + 6\\Taking\,\,-2\,\,common:\\-2(2x^2+5x-3)\\Now\,\,factoring:\\-2(2x^2+6x-x-3)\\-2(2x(x+3)-1(x+3))\\-2(2x-1)(x+3)$

So, the factored form of $-4x^2-10x + 6$ is $-2(2x-1)(x+3)$

So, Sophie has factored the term completely. The terms are factored when we cannot further simplify it. Since Carlos factored (x+3)(-4x+2) 2 can be taken common from the term (-4x+2) so, it is not factored completely.

Keywords: Factoring the terms

Learn more about Factoring the terms at:

#learnwithBrainly

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3 years ago