The max of Lauren's age --> the minimum of the others' ages, 1, 2 & 3
4*avg = 4*9 = 36
36 - (1+2+3) = 30
Lauren is 30 yrs of age, or younger.
Answer: You bought 7 books and you also bought 4 magazines
Explanation:
x = # of books purchased
y = # of magazines purchased
System of equations:
8x + 5y = 76
x + y = 11
Let’s use elimination in this case, but substitution can also work.
8x + 5y = 76
Multiply the (x + y = 11) by -8
We get:
8x + 5y = 76
-8x - 8y = -88
The xs cancel.
Add like terms.
-3y = -12
Divide by -3 on both sides
y = 4
Now plug in 4 into the (x + y = 11) equation to get x.
x + (4) = 11
Subtract 4 on both sides
x = 7
1. (7/21) = 0.33
2. (6/21) - (3/21) = (3/21)
= 0.14
In a parallelogram, adjacent angles make 180°
So in 22
11x + 11 + 70 = 180
11x = 99
x = 9
In 23
12x + 10 + 50 = 180
12x = 120
x = 10
76.8/7 = 10.9714285714 feet or 131.6571428568 inches.
