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Vikentia [17]
3 years ago
7

If x=4, which of the following expressions does not equal to 9

Mathematics
2 answers:
gavmur [86]3 years ago
7 0
I can’t see the following expressions.
BabaBlast [244]3 years ago
5 0

Answer:

if x = 4, which of the following expressions does not equal 9

Multiple Choice:

A. x-(-5)

B. x+5

C. 2x + 1

D. x-13

<em>Correct answer: D</em>

Step-by-step explanation:

First we have to substitute 4 into X for all the multiple choices ( A to D)

A. x-(-5): first substitute 4 for X we will get:

<u>4 - (-5)</u><u> </u>remember order of operation. this means that we have to work with the parentheses first:  negative times negative equal to positive. so, negative times negative 5 equal to positive five: - (-5) = +5 now we go back to solve the rest of the equaltion

<u>4+5 = 9 </u>which means that answer A is incorrect since the question is asking which expression does NOT equal to 9

B.  x+5

4+5 = 9 the answer B is also incorrect because it's equal to 9

C. 2x+1

2(4) +1: 2 times 4 equal 8 plus 1 equal 9.

D. x-13

4 -13 = <u>-9</u>

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(x + 5) + (x² − 6x + 20)
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Answer:

x^3-6x^2-10x+100

Step-by-step explanation:

Step 1: Distribute x to (x²-6x+20).

x(x²-6x+20)=x^3-6x^2+20x

Step 2: Distribute 5 to (x²-6x+20).

5(x² − 6x + 20)=5x²-30x+100

Step 3: Combine x^3-6x^2+20x and 5x²-30x+100.

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hope it helps you <3

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3 years ago
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Step-by-step explanation:

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3 years ago
What’s 690 divided by 4???
poizon [28]
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2 years ago
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Looking at the equation, you can solve for the average rate of change between t = 2 and t = 5, which equals 6.
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