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3 years ago

Keisha solved the following equation:

Mathematics

2 answers:

ad-work [718]3 years ago

4 0

Answer: Step 2 2x + 8 = 6x + 24 Associative Property of Multiplication

Step-by-step explanation: This is the Question...

Keisha solved the following equation:

4x − 2x + 8 = 6(x + 4)

Step Work Justification

1 2x + 8 = 6(x + 4) Combine like terms

2 2x + 8 = 6x + 24 Associative Property of Multiplication

3 −4x + 8 = 24 Subtraction Property of Equality

4 −4x = 16 Subtraction Property of Equality

5 x = −4 Division Property of Equality

Which step has an incorrect justification?

A. Step 1

B. Step 2

C. Step 3

D. Step 4

And the answer is, Step 2.

PLEASE GIVE ME BRAINLIEST!!!! PLEASE!!!

slavikrds [6]3 years ago

3 0

Remark

Answer: The second one. The second step removes the brackets on the right. It uses the distributive property which puts back the common factor that was taken out of the two terms 6x and 24. Quite often the distributive property is useful when presenting a problem to be solved.

The associative property is more of an order thing and that is very useful sometimes as well what it says is that if you have three numbers a + b + c the order which you combine things does not matter.

For example 3 + 4 + 5 could be combined as 3 + 4 = 7; 7 + 5 = 12 or 3 + 5 = 8, 8 + 4 = 12.

The associative property is useful when adding fractions.

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XY and BD are parallel lines.

mr_godi [17]

Answer:

Could you take a picture of the question ?

8 0

2 years ago

Add. (4x2 - 2x) + (5x-7)

Sloan [31]

Answer:

4x²+3x-7 is the answer

Step-by-step explanation:

=(4x²-2x)+(5x-7)

opening brackets

=4x²-2x+5x-7

=4x²+3x-7

i hope this will help you :)

7 0

3 years ago

A consumer advocacy group wants to determine whether there is a difference between the proportions of the two leading automobile

podryga [215]

Answer:

The answer is "0.3206".

Step-by-step explanation:

$H_0: p_1 = p_2\\\\H_a: p_1 \neq p_2\\\\\hat{p_1} = \frac{X_1}{N_1} = \frac{53}{400} = 0.1325\\\\\hat{p_1}= \frac{X_2}{N_2} = \frac{78}{500}= 0.156\\\\\hat{p} = \frac{(X_1 + X_2)}{(N_1 + N_2)} = \frac{(53+78)}{(400+500)} = 0.1456$

Testing statistic:

$z = \frac{(\hat{p_1}- \hat{p_2})}{\sqrt{(\hat{p} \times (1-\hat{p}) \times (\frac{1}{N_1} + \frac{1}{N_2}))}}$

$=\frac{(0.1325-0.156)}{\sqrt{(0.1456\times (1-0.1456)\times (\frac{1}{400} + \frac{1}{500}))}}\\\\ = -0.99$

Calculating the P-value Approach

$\text{P-value}= 0.3206$

7 0

2 years ago

PLEASE HELP URGENT!! DONT LINK FILES!!! HELP!!

Tomtit [17]

Answer:

Base = 8

Step-by-step explanation:

Area of a triangle can be calculated as:

Area = 0.5 x Base x Height

The values of the area and the height are given in order to find the length.

A= 52 in^2

Height= 13

First we have to find the base or the length. Using the values above we can set up the equation as:

1. 52= (0.5)(13)(b)

2. 52/0.5(13)

3. b=8

Answer: The length of the guitar or the base would be 8 inches.

I hope this helps and for future problems regarding this topic use the formula above!!

Formula: 0.5 x Base x Height

4 0

2 years ago

you rent a canoe for 5$ per hour.Your cost before the tax is added is 12.50. write and solve an equation to find the total numbe

Basile [38]

Answer: The equation is 5x = 12.50 and you will have the canoe for 2 and half hours or 2 hours 30 minutes.

Step-by-step explanation:

You rent the canoe for 5 dollars per hour and that can be represented by the expression 5x. After sometime you paid $12.50 meaning that to find the number of hours that you need the canoe, we need to set 5x to equal 12.50.

5x = 12.50 Solve for x by divide both sides by 5.

x = 2.5

This means you will need the canoe for 2 and half hours.

8 0

3 years ago