Answer:
a=−b−c−d+15
Step-by-step explanation:
Step 1: Add -b to both sides.
a+b+c+d+−b=15+−b
a+c+d=−b+15
Step 2: Add -c to both sides.
a+c+d+−c=−b+15+−c
a+d=−b−c+15Step 3: Add -d to both sides.
a+d+−d=−b−c+15+−d
a=−b−c−d+15
Answer:
b)starts at zero at the beginning of the first period and then increases by a constant amount each period.
Step-by-step explanation:
A series is called arithmetic gradient series if it increases or decreases periodically by a constant amount.
Examples are
0,.100,200,300, 400 ....
Decreasing series would be
1000, 800, 600., 400....
Thus the difference between the consecutive terms is a constant.
Hence here out of four definitions we find that
b)starts at zero at the beginning of the first period and then increases by a constant amount each period.
Answer:
24:5
Step-by-step explanation:
4 yards is 3 feet, so 4*3=12. There are 12 inches in a foot, so 12*12=144. 144:30= 72:15 = 24:5
David's total income is ($8/hr)x + ($11/hr)y.
This problem requires us to write and solve an inequality:
8x + 11(15)<$200
Solving for x: 8x < $200-$165, or 8x < $35. Strictly speaking, x = 4.375 hrs, but if we assume that David must work an integer # of hours, then x=5 full hours.
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