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Mara is
m years old, and her younger brother Kyle is
k years old. If Mara is 3 years older than Kyle, which of the following correctly expresses
k in terms of
m ?
Choose 1 answer:
(A)
k=m+3
(B)
k=m-3
(c)
k=3m
(D)
k=3-m

Mara is $m$ years old, and her younger brother Kyle is $k$ years old. If Mara is $3$ years older than Kyle, which of the following correctly expresses $k$ in terms of $m$ ? $\newline$ Choose $1$ answer: $\newline$ (A) $k=m+3$ $\newline$ (B) $k=m-3$ $\newline$ (C) $k=3 m$ $\newline$ (D) $k=3-m$

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Introduction to partial sums

Full solution

Q. Mara is

m

years old, and her younger brother Kyle is

k

years old. If Mara is

3

years older than Kyle, which of the following correctly expresses

k

in terms of

m

?

\newline

Choose

1

answer:

\newline

(A)

k=m+3

\newline

(B)

k=m-3

\newline

(C)

k=3 m

\newline

(D)

k=3-m

Given Information: We are given that Mara is $m$ years old and Kyle is $k$ years old. The problem states that Mara is $3$ years older than Kyle. This can be written as an equation: $m = k + 3$ .
Isolating $k$ : To find $k$ in terms of $m$ , we need to isolate $k$ in the equation. We do this by subtracting $3$ from both sides of the equation: $m - 3 = k$ .
Final Answer: Now that we have isolated $k$ , we can see that $k$ is equal to $m$ minus $3$ , which corresponds to one of the answer choices.

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