zelds63481
17.07.2019 •
Mathematics
On a test of 76 items, pedro got 93% correct. (there was partial credit on some items.) how many items did he get correct? incorrect?
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Ответ:
93 / 100 = x / 76
Cross multiply and divide:
7068 / 100 = 70.68
This means Pedro got around 70 to 71 questions correct and 5 or 6 questions incorrect.
Ответ:
y = 2x² + 16x + 11
Step-by-step explanation:
first foil (x + 4)² to get x² + 8x + 16
distribute 2 to get 2x² + 16x + 32
subtract 21 from 32