Answer:
Step-by-step explanation:
F = 9/5C + 32
Putting value
9/5(49) + 32
88.2 + 32
= 120.2°F
Option E is the correct answer
Answer:
2/3 divided by 4/5
First we convert the denominators to a likewise number.
3 and 5 both share 15.
2 x 5 = 10
10/15
4 x 3 = 12
12/15
10/15 divided by 12/15
Correct answer should be 10 over 12.
Step-by-step explanation:
Answer:
x = 7/30
Step-by-step explanation:
Identify the LCD; it is 30. 30 is the smallest number divisible by both 3 and 10.
Then we have:
(30/30)x + 20/30 = 27/30.
Clearing out the fractions, we get:
30x + 20 = 27, or 30x = 7
Dividing both sides of this result by 30 yields x = 7/30.
Answer:
Kevin needs 96 points on his last test to raise his mean test score to 90 points.
Step-by-step explanation:
we know that
The mean score is the total of all scores divided by the total number of tests.
Let
x_1 ----> the score in the first math test
x_2 ----> the score in the second math test
x_3 ----> the score in the third math test
x_4 ----> the score in the fourth math test
we have
After taking the first 3 tests, his mean test score is 88 points
so

----> equation A
How many points does he need on his last test to raise his mean test score to 90 points?
so

----> equation B
substitute equation A in equation B

solve for x_4


Therefore
Kevin needs 96 points on his last test to raise his mean test score to 90 points.
It’s 3.8 inches I’m pretty sure