(2x-4)(x+5) expand with indicated multiplication...
2x^2+10x-4x-20
2x^2+6x-20 (it's the top one :P)
Answer:
y=-7
x=3
Step-by-step explanation:
I just used a calculator. Hope this helps. :)
Answer:
-18
Step-by-step explanation:
Answer:
Yes, it is B
Step-by-step explanation:
Plug in 4 and 3 into the equations
2(4) - 3(3) = -1
8 - 9 = -1
-1 = -1
4 = 3 + 1
4 = 4
Answer:
x = 7
Step-by-step explanation:
Since the figures are similar then the ratios of corresponding sides are in proportion , that is
=
, substitute values
=
( cross- multiply )
48(7x - 9) = 60(4x + 4) ← divide both sides by 48
7x - 9 = 1.25(4x + 4) ← distribute parenthesis
7x - 9 = 5x + 5 ( subtract 5x from both sides )
2x - 9 = 5 ( add 9 to both sides )
2x = 14 ( divide both sides by 2 )
x = 7