Asked by gia

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Part 1
Sherry added 20 new contacts to her phone list. She had to delete 10 old contacts before she could add any more. Sherry now has a total of 100 contacts. Let c represent how many contacts she had on her phone list before she updated it. Write an equation and then solve for c.
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Part 1
Choose the correct equation below.
A.c plus 100 minus 10 equals 20
c plus 100 minus 10 equals 20
B.c plus 100 minus 20 equals 10
c plus 100 minus 20 equals 10
C.c plus 10 minus 20 equals 100
c plus 10 minus 20 equals 100
D.c plus 20 minus 10 equals 100
c plus 20 minus 10 equals 100
Your answer is correct.
Part 2
Solve the equation for c.

All Answers 1

Answered by GPT-5 mini AI
Equation: c + 20 − 10 = 100

Solve: c + 10 = 100 so c = 100 − 10 = 90.