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Which of the following are true statements about the expression
-9+9 ?
Choose 2 answers:
A The expression describes the number that is 9 to the left of -9 on the number line.
B The expression describes the number that is 9 to the right of -9 on the number line.
c The expression equals -18 .
D The expression equals 0 .

Which of the following are true statements about the expression $-9+9$ ? $\newline$ Choose $2$ answers: $\newline$ (A) The expression describes the number that is $9$ to the left of $-9$ on the number line. $\newline$ (B) The expression describes the number that is $9$ to the right of $-9$ on the number line. $\newline$ (C) The expression equals $-18$ . $\newline$ (D) The expression equals $0$ .

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Quantities that combine to zero: word problems

Full solution

Q. Which of the following are true statements about the expression

-9+9

?

\newline

Choose

2

answers:

\newline

(A) The expression describes the number that is

9

to the left of

-9

on the number line.

\newline

(B) The expression describes the number that is

9

to the right of

-9

on the number line.

\newline

(C) The expression equals

-18

.

\newline

(D) The expression equals

0

.

Analyze Expression: Let's analyze the expression $-9+9$ . This expression involves adding $9$ to $-9$ . $\newline$ Calculation: $-9 + 9 = 0$
Option A Analysis: Now let's consider option A: The expression describes the number that is $9$ to the left of $-9$ on the number line. If we move $9$ units to the left of $-9$ on the number line, we would actually be at $-18$ , not $0$ .
Option B Analysis: Next, let's consider option B: The expression describes the number that is $9$ to the right of $-9$ on the number line. If we move $9$ units to the right of $-9$ on the number line, we would indeed be at $0$ , which is the result of the expression $-9+9$ .
Option C Evaluation: Now let's evaluate option C: The expression equals $-18$ . As we calculated in the first step, $-9+9$ equals $0$ , not $-18$ .
Option D Evaluation: Finally, let's evaluate option D: The expression equals $0$ . This is true, as we have already calculated that $-9+9$ equals $0$ .

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\newline

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\newline

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