Answer: C.) The total number of stamps is 35.
Step-by-step explanation:
Given the table :
No of 45-cent stamp - - - No of 65-cent stamp
- - - - - - - 18 - - - - - - - - - - - - - - 17
- - - - - - - 20 - - - - - - - - - - - - - - - 15
- - - - - - 22 - - - - - - - - - - - - - - 13
- - - - - - 10 - - - - - - - - - - - - - - - - 25
Verifying each option stated :
Total value of stamp:
Each row add up to 35. Example (18 + 17) = 35
(20 + 15) = 35
(22 + 13) =35
(10 + 25) = 35
Total value of stamp:
Using the first row:
45 cent = $0.45 ; 65 cent = $0.65
(10 * 0.45) + (25 * 0.65)
= $4.5 + $16.25 = $20.75
Not all rows add up to $19.15
Answer: x=-8
Step-by-step explanation: 12-5x+6x=4 1. Combine like terms: -5x+6x+12=4 2. Simplify: x+12-12=4-12 3. Subtract 4 from -12 so that you can find out what x is: x=-8
In order to find the slope, m, you would have to find the change in y over the change in x.
y2 - y1 -12 - 8 -20 -10
---------- = ---------- = ------- = -------- = 5
x2 - x1 6 - 8 -2 -2
The negatives would cancel out and you would get 5 as your slope, which is positive.
There are 2 of 5 students that do not eat breakfast. This can be represented as 2/5. To find how many did not eat breakfast, you multiply 2/5 by 2500.
This gives you 1,000.
Therefore, 1,000 students surveyed did not eat breakfast.
Hope this helps!