Step-by-step explanation:
10x-10+30=12x-4
10x+20=12x-4
24=2x
12=x
So, the number of chips Dregg eat was 22.
<em><u>Explanation</u></em>
Suppose, the number of potato chips is
As each chip had 12 calories, so the total calories in number of chips
The hamburger had 375 calories and the meal had total 639 calories. So, the equation will be .......
So, the number of chips Dregg eat was 22.
Answer:
3.71
Step-by-step explanation:
The mean absolute deviation(MAD) of a data set is given by the formula
= number of data set values. Here
mean of the data set values; =
are the n individual values
= Answer
Answer: x<8
Step-by-step explanation:
Answer:
Cost of a kit is $20
cost of a microscope is $80
Step-by-step explanation:
Here, we want to write a set of equations and solve
Let the cost of a microscope be $m while the cost of a kit be $k
Total cost of 38 microscopes will be 38 * m = $38m
Total cost of 47 kits = 47 * k = $47k
The sum of these is $3980
That will be;
47k + 38m = 3980 ••••••(i)
A microscope cost 4 times a kit
Mathematically;
m = 4k •••••••••(ii)
Substitute ii into i
47k + 38(4k) = 3980
47k + 152k = 3980
199k = 3980
k = 3980/199
k = $20
Recall;
m = 4k
m = 4 * 20 = $80