When three numbers are added two at a time, the sums are 29, 46, 53. What is the sum of all three numbers?
1 answer:
Answer:
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Step-by-step explanation:
Let the three numbers be a, b and c; such that:
---- (1)
--- (2)
--- (3)
Subtract equation 2 from 3
--- (4)
Add this equation to the (1)
Solve for a
Substitute 18 for a in (1)
Solve for b
Substitute 11 for b in (2)
Solve for c
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Answer:
0
Explanation:
A---(-3)---R
-3 is the midpoint of AR. If -3 is the midpoint we need to add 3 to -3 to find point R.
(-3) + 3 = 0
(If we were going to find the coordinate point of A, then we would subtract 3 from -3).
Answer: 18 cm
Step-by-step explanation:
Perimeter is the sum of all 4 sides of a rectangle.
Let w => width
Let l => length = 2w + 1
P = 110 cm = w + w + 2w+1 + 2w + 1
6w +2 = 110
6w = 108
w = 18
Therefore:
w = 18 cm
l = 36 +1 = 37 cm
Check: 18 + 18 +37 + 37 = 110 cm
Answer:
A
Step-by-step explanation:
Answer:
1.107...
Step-by-step explanation:
I used a calculator and got, 1.1071428571428571428571428571429