Average =total sum of all the numbers / number of items in the set.
In other words, to find the average, add up all of the numbers in the set, and then divide by however many items you have.
A.
Test scores: 78,83 and 79
average =(78+83+79)/3 = 80
B.
weights : 2 lb, 5 lb, 7 lb, 5 lb, 9 lb, and 8 lb.
average = (2 lb+ 5 lb+ 7 lb+ 5 lb+ 9 lb+ +8 lb)/6 = 36/6 = 6lb
Answer:
x = 27/10 or x = 2.7
Step-by-step explanation:
Step 1: Get rid of the denominator.
LCD of 4 & 3: 12
Multiply both sides by 12.
12 ( 2x - 1 / 4 ) + 12 ( x / 3 ) = 12 (2)
Reduce the numbers.
3 ( 2x - 1) + 4x = 24
Step 2: Distribute.
6x - 3 + 4x = 24
Step 3: Collect like terms.
6x + 4x = 24 + 3 ( - 3, the sign change when moved to the other side)
10x = 27
Step 4: Solve for x.
Multiply both sides by 10.
10x / 10 = 27 / 10 (the 10 cancels out)
x = 27 / 10 or x = 2.7
Answer: x = 27 / 10 or x = 2.7
#10
#11
- Last three i.e Option B,C,D
#13
It started from negative ends at positive hence
#14
#15
#16
Replace <span>x = 2 into f(x)=7x-5
</span> f(2)=7(2)-5 = 14 -5 = 9
answer is <span>A. 9</span>
