Answer:Can you find the sum [5.5 + (-2.3)] + (-5.5 + 2.3) without performing any additions? - Slader.
1 answer
Missing: 7.25-5.5 7.25)
Step-by-step explanation:
A = 30 x 129 / 100 = $38.7 129 - 38.7 = $90.3
B= 35 x 135 / 100 = $47.25 135 - 47.25 = $ 87.75
C= 40 x 150 / 100 = $60. 150 - 60 = $90
Store B would be the cheapest
Step-by-step explanation:
are there any examples?
Answer:
x = 5 + 2 sqrt(13) or x = 5 - 2 sqrt(13)
Step-by-step explanation:
Solve for x over the real numbers:
0 = x^2 - 10 x - 27
0 = x^2 - 10 x - 27 is equivalent to x^2 - 10 x - 27 = 0:
x^2 - 10 x - 27 = 0
Add 27 to both sides:
x^2 - 10 x = 27
Add 25 to both sides:
x^2 - 10 x + 25 = 52
Write the left hand side as a square:
(x - 5)^2 = 52
Take the square root of both sides:
x - 5 = 2 sqrt(13) or x - 5 = -2 sqrt(13)
Add 5 to both sides:
x = 5 + 2 sqrt(13) or x - 5 = -2 sqrt(13)
Add 5 to both sides:
Answer: x = 5 + 2 sqrt(13) or x = 5 - 2 sqrt(13)
