Hi. If you need me to explain please tell me so I will edit this comment. I'll just solve the answers for you... basically if they have a common denominator just add/ subtract, and if they don't, make it so they do by multiplying the same on each side.
2)
a. 1 3/4 + 2 1/4 = 4
b. 3 7/10 + 1 1/10 = 4 4/5
c. 2 1/8 + 3 3/8 = 5 1/2
d. 5 1/2 + 3 1/4 = 8 3/4
e. 5/8 + 2 1/4 = 2 7/8
f. 3 3/10 + 5 2/5 = 8 7/10
3)
a. 2 7/10 - 1 3/10 = 1 2/5
b. 3 5/8 - 2 3/8 = 1 1/4
c. 1 5/6 - 1/6 = 1 2/3
d. 3 7/10 - 1 1/2 = 2 1/5
e. 4 3/5 - 2 = 2 3/5
f. 1 3/8 - 1 1/8 = 1/4
The cost to equip all the stations in the chemistry lab is calculated as: $393.75.
<h3>How to Calculate Total Cost?</h3>
In this scenario, we are given the following:
Total number of stations = 21 stations
Length of rubber tubing each of the stations in the chemistry lab needs = 5 feet
Total length of rubber tubing needed for all stations in the chemistry lab = 21 × 5 = 105 feet
Cost of 1 rubber tubing = $6.25 per yard
Convert 5 feet to yard:
1 yard = 3 feet
x yard = 5 feet
x = (5 × 1)/3
x = 5/3 feet.
So, the cost of 1 rubber tubing = $6.25 per 5/3
Cost of total length of tubbing needed = (105 × 6.25)/5/3 = (105 × 6.25) × 3/5
Cost of total length of tubbing needed = $393.75
Therefore, the cost to equip all the stations in the chemistry lab is calculated as: $393.75.
Learn more about the How to Calculate Total Cost on:
brainly.com/question/2021001
#SPJ1
Answer:
401.24m
Step-by-step explanation:
the length is,
97x2 + 66x3.14
We conclude that the starting average grade is 79.17%
<h3>
How to write the equation and solve it?</h3>
There are 50 students, let's say that the grades are measured between 1% and 100%.
And the average grade of the 50 students is A.
We know that after it increased by 20%, the average of the grades is 95.
Then we just need to solve the percentage equation:
95 = A*(1 + 20%/100%) = A*(1.2)
95/1.2 = A = 79.17
We conclude that the starting average grade is 79.17%
If you want to learn more about percentages:
brainly.com/question/843074
#SPJ1
Answer:
2.2 x10= = 22.2 =22 million.
Step-by-step explanation:
