Bob has one sister.
1. she is 4 years older than twice bob’s age
2. the sum of their ages is 76
what is the answer?

sister is 52

bob is 24

Step-by-step explanation:

Let S = sisters age and B = Bob's age

Bob's sister is 4 years older than twice Bob's age:

mathematically : S = 4 + 2B eq1

the sum of their ages is 76

mathematically : S + B = 76 eq 2

substituting eq 1 into eq2,

S + B = 76

(4+2B) + B = 76

4 + 3B = 76  (subtract 4 from both sides)

3B = 76 -4

3B = 72  (divide both sides by 3)

B = 72/3 = 24 (answer)

substitute value of B into equation 1

S = 4 + 2B

S = 4 + 2(24)

S = 4 + 48

S = 52 (answer)

the correct answer to your question is a. 4^4

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the anwser is d) 75°

step-by-step explanation: