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2 years ago

Factor-20x2 + 13x + 21. How do you solve this

Mathematics

1 answer:

zaharov [31]2 years ago

5 0

Answer:

-3(9x-7)

Step-by-step explanation:

first multiply

20x2=40

and now its -40x+13x+21

then add same variables

-40x+13x=-27x

now its -27x+21

then rewrite the equation

3 x 7=21

-3 x 9x = 27x

now its (-3 x 9x) + (3 x 7)

then the multiply thingy and you got the answer

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Three multiplied by the sum of 4 and a number is the same as 18 more than the number. Find the number.

arsen [322]

3(4+n)=18+n
distribute
12+3n=18+n
minus n both sides
12+2n=18
minus 12 both sides
2n=6
divide by 2
n=3

the number is 3
equation is
3(4+n)=18+n

6 0

3 years ago

Where do I put the parentheses: 7+3x4-1=39

allsm [11]

(7+3)x(4-2)=39
I hope that helps

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2 years ago

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Through (-1,-3) slope=8

gtnhenbr [62]

Answer:

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Step-by-step explanation:

Please see attached picture for full solution.

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2 years ago

Seven times a number decreased by three-fourths of the same number is 25. What is the number?

Tomtit [17]

Answer:

103/28

Step-by-step explanation:

Let the number be 'x'

Equation:-

7x - 3/4 = 25

7x = 25 + 3/4

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7x = 103/4

x = 103/(4 x 7)

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3 years ago

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mixas84 [53]

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