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Amber tried to evaluate an expression step by step.

{:[-3-(-5)+4],[=-3+5+4quad" Step "1],[=-3+9quad" Step "2],[=-12],[" Step "3]:}
Find Amber's first mistake.
Choose 1 answer:
(A) The opposite of -5 is -5 , not 5 .
(B) Adding from right to left changes the sum's value.
(C) -3 plus 9 equals 6 , not -12 .

Amber tried to evaluate an expression step by step. $\newline$ $\begin{array}{l} -3-(-5)+4 \\ =-3+5+4 \quad \text { Step } 1 \\ =-3+9 \quad \text { Step 2 } \\ =-12 \quad \text { Step } 3 \\ \end{array}$ $\newline$ Find Amber's first mistake. $\newline$ Choose $1$ answer: $\newline$ (A) The opposite of $-5$ is $-5$ , not $5$ . $\newline$ (B) Adding from right to left changes the sum's value. $\newline$ (C) $-3$ plus $9$ equals $6$ , not $-12$ .

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Solve a system of equations using any method: word problems

Full solution

Q. Amber tried to evaluate an expression step by step.

\newline

\begin{array}{l} -3-(-5)+4 \\ =-3+5+4 \quad \text { Step } 1 \\ =-3+9 \quad \text { Step 2 } \\ =-12 \quad \text { Step } 3 \\ \end{array}

\newline

Find Amber's first mistake.

\newline

Choose

1

answer:

\newline

(A) The opposite of

-5

is

-5

, not

5

.

\newline

(B) Adding from right to left changes the sum's value.

\newline

(C)

-3

plus

9

equals

6

, not

-12

.

Evaluate expression: Amber starts with the expression: $-3 - (-5) + 4$ . She evaluates $-3 - (-5)$ as $-3 + 5$ in Step $1$ . Calculation: $-3 - (-5) = -3 + 5 = 2$ .
Add $4$ : Amber then adds $4$ to the result from Step $1$ . $\newline$ She calculates $-3 + 5 + 4$ as $-3 + 9$ in Step $2$ . $\newline$ Calculation: $2 + 4 = 6$ .
Combine results: Amber combines the results and states that $-3 + 9$ equals $-12$ in Step $3$ . $\newline$ This is incorrect because $-3 + 9$ actually equals $6$ . $\newline$ Calculation: $-3 + 9 = 6$ .

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\newline

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\newline

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Question

Jessie tried to solve an equation step by step.

\newline

1.5 b+9=11

\newline

1.5 b=3 \quad \text { Step } 1

\newline

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\newline

Find Jessie's mistake.

\newline

1

\newline

1

\newline

2

\newline

(C) Jessie did not make a mistake.

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Question

Leon tried to solve an equation step by step.

\newline

\begin{aligned} \frac{1}{2} w-12 & =18 \\ \frac{1}{2} w & =30 \quad \text { Step } 1 \\ w & =15 \quad \text { Step 2 } \end{aligned}

\newline

Find Leon's mistake.

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\newline

2

\newline

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Question

Olga tried to solve an equation step by step.

\newline

\begin{array}{rlrl} \frac{1}{4}\left(\frac{1}{3} k+9\right) & =6 & \\ \frac{1}{3} k+9 & =24 \quad \text { Step 1 } \\ \frac{1}{3} k & =15 \quad \text { Step 2 } \\ k & =5 \quad \text { Step 3 } \end{array}

\newline

Find Olga's mistake.

\newline

1

\newline

1

\newline

2

\newline

\operatorname{Step} 3

\newline

D Olga did not make a mistake.

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\newline

Which equation would help determine the cost of

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\newline

1

\newline

\frac{x}{5}=\frac{\$ 8.96}{7}

\newline

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\newline

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\newline

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\newline

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Question

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\newline

1

\newline

\sqrt{2}

\newline

2

\newline

4

\newline

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