Answer:
x = 12
Step-by-step explanation:
Answer:
First number --> x
Second number --> y
x + y = 14 --> x = 14 - y
x - y = 4
so
14 - y - y = 4
14 - 2y = 4
2y = 10
y = 5
so
x = 14 -5
x = 9
-- Look at the two numbers.
-- Say to yourself: "Self ! 3.9 is close to 4, and 5.3 is close to 5.
So the product is going to be close to (4 x 5) = 20."
-- Then do the real multiplication.
-- On your paper or your calculator, you see the digits 2 0 6 7 .
-- From your estimate (20), you know that it can't possibly be
2.067 or 206.7 or 2,067. It must be 20.67 .
Answer:
length enlarged by 10 ft
Step-by-step explanation:
Given:
Width = 11 ft
length = 22 ft
New area = 352 ft²
New length = 22 + x ft
Find:
Value of x
Computation:
(11)(22+x) = 352
242 + 11x = 352
11x = 110
x = 10
So, length enlarged by 10 ft