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3 years ago

9x^3 + 45x^2 - 4x -20 ; x+5 synthetic division

1 answer:

3 0

9x² + 0x - 4
x + 5|9x³ + 45x² - 4x - 20
 9x³ + 45x² 
 -4x - 20
 -4x - 20
 0
The answer is equal to 9x² - 4.

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Answer:

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3 years ago

The sum of two numbers is 64. One number is 8 more than the other. What are the two numbers?

lisabon 2012 [21]

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28 and 36.

Step-by-step explanation:

Alright, so we are given that the sum of two numbers is 64. Based on this, we know that we are going to be adding because the question said "the sum of two numbers is 64." Sum is the answer to an addition problem. Lets write an equation.

We need a variable, let x be the variable which is the value of the smaller number.

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x= to the smaller number

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Before we isolate for x, we need to simplify the expression by combining the like terms.

x plus x equals 2x.

Therefore, we have 2x+8=64.

Our goal is to isolate x, so we need to subtract 8 from both sides. 8 mius 8 is 0, and 64 mius 8 is 56.

Now, we have 2x=56.

We still need to isolate x by dividing both sides by 2. 2 divided by 2 is 1, so we are left with 1x or x. 56 divided by 2 is 28.

x=28.

Great, we found what x or the smaller value is.

Now, we need to find the larger number.

Substitute x as 28 into x+8 to find the number that is 8 more than the smaller number or x. You'll then get 36. If you add 36 and 28, you get 64. Also, 36 is 8 more than 28, so this answer is correct.

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3 years ago

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Answer:

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Step-by-step explanation:

we know that

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