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3 years ago

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

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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What is the answer to this solution. -7r−4≥ 4r+2

tia_tia [17]

Answer:

The solution is:

$-7r-4\ge \:\:4r+2\quad \::\quad \:\begin{bmatrix}\mathrm{Solution:}\:&\:r\le \:\:-\frac{6}{11}\:\\ \:\:\mathrm{Decimal:}&\:r\le \:\:-0.54545\dots \:\\ \:\:\mathrm{Interval\:Notation:}&\:(-\infty \:\:,\:-\frac{6}{11}]\end{bmatrix}$

Please check the attached line graph below.

Step-by-step explanation:

Given the expression

$-7r-4\ge \:4r+2$

Add 4 to both sides

$-7r-4+4\ge \:4r+2+4$

Simplify

$-7r\ge \:4r+6$

Subtract 4r from both sides

$-7r-4r\ge \:4r+6-4r$

Simplify

$-11r\ge \:6$

Multiply both sides by -1 (reverses the inequality)

$\left(-11r\right)\left(-1\right)\le \:6\left(-1\right)$

Simplify

$11r\le \:-6$

Divide both sides by 11

$\frac{11r}{11}\le \frac{-6}{11}$

Simplify

$r\le \:-\frac{6}{11}$

Therefore, the solution is:

Please check the attached line graph below.

7 0

3 years ago

Slope=2/3, y-intercept=-5 please helphelp

Shtirlitz [24]

What do u need help w
its y=2/3x - 5

3 0

3 years ago

The marketing club at school is opening a student store. They randomly survey 50 students about how much money they spend on lun

Luden [163]

Answer:

The expected value for a student to spend on lunch each day = $5.18

Step-by-step explanation:

Given the data:

Number of students______$ spent

2 students______________$10

1 student________________$8

12 students______________$6

23 students______________$5

8 students_______________$4

4 students_______________$3

Sample size, n = 50.

Let's first find the value on each amount spent with the formula:

$\frac{num. of students}{sample size} * dollar spent$

Therefore,

For $10:

$\frac{2}{50} * 10 = 0.4$

For $8:

$\frac{1}{50} * 8 = 0.16$ l

For $6:

$\frac{12}{50} * 6 = 1.44$

For $5:

$\frac{23}{50} * 5 = 2.3$

For $4:

$\frac{8}{50} * 4 = 0.64$

For $3:

$\frac{4}{50} * 3 = 0.24$

To find the expected value a student spends on lunch each day, let's add all the values together.

Expected value =

$0.4 + $0.16 + 1.44 +$2.3 + $0.64 + $0.24

= $5.18

Therefore, the expected value for a student to spend on lunch each day is $5.18

7 0

3 years ago

X/3/8 = 24 put answer as whole number

rewona [7]

Answer:

$9 = x$

Step-by-step explanation:

$24 = \frac{x}{\frac{3}{8}} \\ \\ [24][\frac{3}{8}] = \frac{72}{8} = 9 \\ \\ 9 = x$

I am joyous to assist you anytime.

8 0

3 years ago

Explain why the graph below does not represent a direct variation

Nitella [24]

Answer:

C. The line does not go through the origin.

Step-by-step explanation:

We have been given a straight line graph that doesn't pass through origin (0,0) and has y-intercept at (0,3).

Now we need to decide why that graph doesn't represent a direct variation.

We know that graph represents variation when it passes through origin. But since given graph doesn't passes through origin so it doesn't represent the direct variation.

Correct choice is :

C. The line does not go through the origin.

4 0

3 years ago

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