EXPLAIN THE MISTAKE

Mathematics

1 answer:

Vlad [161]3 years ago

7 0

Step-by-step explanation:

Both of these mistakes were made bc someone didn't know what "supplementary" means. If two angles are supplementary (an angle and its supplement) they ADD UP TO 180°

Mistake: They used 90 in the original set up. These angles do not add up to 90°.

47+x=180 subtract 47 from both sides

x = 133°

In #5, MISTAKE: the original set up, they put the two angles equal to each other. The two shown angles laying next to each other add up to 180°

115°+ (5x-10)°= 180° combine like terms

5x + 105° = 180 subtract 105 from both sides

5x = 75 divide by 5

x = 15

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On a placement examination, Rick scored lower than 1192 of the 12,790 students who took the exam. Find the percentile, rounded t

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Rick's score is higher than 91% of the other students.

Given that on a placement examination, Rick scored lower than 1192 of the 12,790 students who took the exam, to find the percentile, rounded to the nearest percent, for Rick's score, the following calculation must be performed:

12790 - 1192 = 11598
12790 = 100
11598 = X
11598 x 100/12790 = X
1159800/12790 = X
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Therefore, Rick's score is higher than 91% of the other students.

Learn more about percentages in brainly.com/question/25823155

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Answer:

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Step-by-step explanation:

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3 years ago

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LenKa [72]

B is a diamond, and i believe all the angles would be the same, get a protractor helps a lot.

now if i'm wrong ignore me