Answer:
x= 1/2 and x= -3
Step-by-step explanation:
Let's solve your equation step-by-step.
2x2+5x−3=0
Step 1: Factor left side of equation.
(2x−1)(x+3)=0
Step 2: Set factors equal to 0.
2x−1=0 or x+3=0
x=
1
2
or x=−3
For this you need to expand the brackets first:
3(2x+5)-4(2x-7) = 6x+15-8x-28
And then now you need to add and simplify:
6x+15-8x-28 —> 6x-8x= -2x
15-28= -13
So that leaves
-2x - 13
Answer:
11 hours
Step-by-step explanation:
The number of machines working in the factory = 6 machines
Decreasing it by a factor of 2 =
6 ÷ 2 = 3 machines.
Hence:
If 6 machines complete a big order = 22 hours
3 machines = x hours
Cross Multiply
6 machines × x hours = 22 hours × 3 machines
x hours = 22 hours × 3/6
= 66/6
x = 11 hours
Therefoee, it would take 11 hours to fill the order if the number of working machines decreased by factor of 2.
