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2 years ago

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

Mathematics

2 answers:

gavmur [86]2 years ago

7 0

I can’t see the following expressions.

BabaBlast [244]2 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

Correct answer: D

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:

4 - (-5) 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

4+5 = 9 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 = -9

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2 years ago

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VMariaS [17]

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Step-by-step explanation:

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3 years ago

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Lelu [443]

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2 years ago

I am trying to figure this question: 1 + tan^2A = Sec^2A

chubhunter [2.5K]

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see explanation

Step-by-step explanation:

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2 years ago

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Svetradugi [14.3K]

Using the mean concept, it is found that:

Relative to Sabrina's goal, her average swim time over the last five weeks is 0.1 hours.

-----------------------

The mean of a data-set is given by the sum of all observations divided by the number of observations.

In this problem:

The data-set is her swim time relative to her goal, which is: {1.25, -1, 2.25, 0, -2.}

5 observations.

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$M = \frac{1.25 - 1 + 2.25 + 0 - 2}{5} = 0.1$

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A similar problem is given at brainly.com/question/24787716

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2 years ago