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3 years ago

Cecilia simplified an expression. Her work is shown below.

Mathematics

2 answers:

Alika [10]3 years ago

8 0

Answer:

Step 2

Step-by-step explanation:

Given work on simplification

(6 and one-half + 2 and three-fourths) minus 1.5 times (4.5 divided by 0.5)

(6 1/2 + 2 3/4) - 1.5 (4.5 ÷ 0.5)

Step 1 9 and one-fourth minus 1.5 times (4.5 divided by 0.5)

9 1/4 - 1.5 (4.5 ÷ 0.5)
This is ok as first step is solving parenthesis

Step 2 7.75 times (4.5 divided by 0.5)

7.75 (4.5 ÷ 0.5)
Incorrect, subtraction should be the last step

Citrus2011 [14]3 years ago

4 0

Answer: second step.

Step-by-step explanation:

you then have to distribute the answer not subtract 9 1/4 from 1.5

you have to do the parenthesis next

4.5/0.5=45/5=9

then

1.5*9= 13.5

then

9.25-13.5 which I think you are capable of solving

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What is the value of 5n-3 when n=5?

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Answer:

Step-by-step explanation:

We are given the expression:—

$\displaystyle \large{5n-3}$

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$\displaystyle \large{5(5)-3}$

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__________________________________________________________

Summary

Substitution

Changing or replacing from a term to another terms/expression is called substitution.

Examples:—

If we are given the expression $\displaystyle \large{2y-1}$ and we want to find the value when y = 4, simply replace y-term to 4.

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If you have any doubts regarding my answer/explanation, do not hesitate to ask in comment!

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2 years ago

|3x| = 9 Variable please.

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Answer:

x = 3 or x = -3

Step-by-step explanation:

The absolute value of 3x = 9

Divide nine by 3 to get 3

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