Less than. -20 is not the same as positive 20
Answer:
Hi there!
The answer to this question is: 7
Step-by-step explanation:
You simply plug in the values given and solve
8(1/2) + 3(7) -18
4+21-18=7
Use photomath. it shows the work too
Answer:
30 and 17
Step-by-step explanation:
Using Pythagoras' theorem, that is
The square on the hypotenuse of a right triangle is equal to the sum of the squares on the other 2 sides, thus
(1)
c² = 18² + 24² = 324 + 576 = 900
Take the square root of both sides
c =
= 30
(2)
c² = 8² + 15² = 64 + 225 = 289
Take the square root of both sides
c =
= 17
A = LW
A = 120
W = L - 2
120 = L(L-2)
120 = L^2 - 2L
L^2 - 2L - 120 = 0
(L - 12)(L + 10) = 0
L - 12 = 0
L = 12
L + 10 = 0
L = -10 (extraneous solution...will not work)
length (L) = 12 ft
width (W) = L - 2 = 12 - 2 = 10 ft