Answer:
result bellow
Step-by-step explanation:
b= -4.
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Answer:
75
Step-by-step explanation:
By "composite" we mean "numbers that can be factored further."
The numbers between 10 and 20 but not including 10 or 20 are:
12, 14, 15, 16, 18
12, 14, 15, 16 and 18 are all composite numbers (all can be factored).
Their sum is 75.
Christopher walks 30 miles in double the time as long as he stays at the same consistent speed
Answer:
Nancy's age is 11years and Khaled's age is 10years
Step-by-step explanation:
Let Nancy's present age be x
Let Khaled's present age b y
3 years ago
Nancy = x - 3
Khaled = y - 3
If 3 years ago, Nancy’s age was more than Khaled’s age by 2, then;
x-3 = y-3 + 2
x - 3 = y - 1
x- y = -1+3
x - y = 2 ...1
4 years from now,
Nancy = x+4
Khaled = y+4
If by 4years from now, twice Nancy’s age will be more than Khaled’s age by 16, then;
2(x+4) = y+4 + 16
2x+8 = y+20
2x-y = 20-8
2x-y = 12 ....2
Subtract 1 from 2;
x - 2x = 1 - 12
-x = -11
x = 11
Since x - y = 1
11 - y = 1
y = 11-1
y = 10
Hence Nancy's age is 11years and Khaled's age is 10years
