Answer:
4. 5. 3. are correct im pretty sure
Step-by-step explanation:
X= grade on next test
Add up all scores, divide by 6 and this equals the average of 84
(86 + 91 + 86 + 61 + 87 + x)/6= 84
add in parentheses
(411 + x)/6= 84
multiply both sides by 6
411 + x= 504
subtract 411 from both sides
x= 93
ANSWER: 93 is needed on the next test to have an average of 84
Hope this helps! :)
Answer:
Step-by-step explanation:
Answer:
9.68
Step-by-step explanation:
add the whole numbers
2 + 1 + 5 = 8
now add the decimals
.22 + .66 + .8 = 1.68
8 + 1.68 = 9.68
Answer: Yes.
Step-by-step explanation:
This is a right angled triangle.