Answer:
The last quiz score must be at least an 80 to get the average to be a 70.
Step-by-step explanation:
In order to find this, you need to take the average of the 4 test scores along with the unknown test score (x). So, to find an average, we add all the numbers together and divide by the amount of tests taken. We can then set this equal to 70 since that is the minimum average.
(60 + 64 + 75 + 71 + x)/5 = 70 ------> Multiply both sides by 5
(60 + 64 + 75 + 71 + x) = 350 -----> Combine like terms
270 + x = 350 -----> Subtract 270 from both sides
x = 80
Answer:
r = - 13 / 15 inches/week
Step-by-step explanation:
The numerator is 13
and the denominator is 15, then we have
r = - 13 / 15 inches/week
r < 0 since the water level of the lake fell
Brandy got 1162 scoring for competing in the bonus round of the particular game show.
Step-by-step explanation:
- By getting the 523 scores in the literature questions sections a 639 point in the automobile section. next could be the bonus round.
- So the score she obtained so far to compete in the bonus round is found by the addition of the two scores.
- The addition of 523 and 639 gives us 1162 which is the score for entering the bonus round.
4.3x+5x=16+7-(7)
9.3x=16
x= 1.72
give me a brainliest if possible. please.. tnx
