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frutty [35]
3 years ago
9

Five times the difference of twice a number and twelve is negative twenty. Find the number. I need help with this guys please so

meone help
Mathematics
1 answer:
Lilit [14]3 years ago
7 0

Answer:

The number is 4.

Step-by-step explanation:

The difference of twice a number and 12 is 2x - 12.

Multiplying by 5 gives 5(2x - 12)

So 5(2x - 12) = -20

Solving for x

10x - 60 = -20

10x  = -20 + 60 = 40

x = 40/10

x = 4.

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Express the sum of the polymonial 3x^2+15x-56 and the square of the binomial (x-8) as a polynomial in standard form.
tester [92]

Given:

Polynomial is 3x^2+15x-56.

To find:

The sum of given polynomial and the square of the binomial (x-8) as a polynomial in standard form.

Solution:

The sum of given polynomial and the square of the binomial (x-8) is

3x^2+15x-56+(x-8)^2

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=3x^2+15x-56+x^2-16x+64

On combining like terms, we get

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3 years ago
Find the measurements of the numbered angles in each isosceles trapezoid.
SSSSS [86.1K]

Answer:

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Step-by-step explanation:

∠1 = 96°

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