You have to add all the scores and dived by the 20 students, the result is 65.85%
21 and -4, because -4x21 = -84, and 21+-4 (– 4) = 17
If you would like to simplify <span>(-15 + 78) - |22 - 83|, you can do this using the following steps:
</span>(-15 + 78) - |22 - 83| = 63 - <span>|-61| = 63 - 61 = 2
The correct result would be 2.</span>
Answer:
shirt is 20.5 and sweater is 16.33
Step-by-step explanation:
Let us say that:
x = invested at 7%
y = invested at 8.5%
and that:
<span>x + y = 12,000</span>
We can also say that:
0.07 x + 0.085 y = 900
Therefore:
0.07 x + 0.085 (12000 – x) = 900
0.07 x + 1020 – 0.085 x = 900
- 0.015 x = -120
x = $8000
so y is:
y = 12000 – 8000
y = $4,000
$8000 is invested at 7% annual interest while $4000 is invested at 8.5%
