2 years ago

Sandra took 4 tests in math and her mean score was 18. I she scored 18, 22, and

Mathematics

1 answer:

Salsk061 [2.6K]2 years ago

7 0

Answer:

Step-by-step explanation:

(18+22+17+x)/4=18

18+22+17+x=18×4

57+x=72

x=72-57

x=15

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