The last step of an equation whose solutions are x=-10 and x=-5 is:
(x+10)(x+5)=0
We need to add some previous steps, which make the equation an absolute value equation.
A way to do this, is writing |(x+10)(x+5)|=0,
the only solutions are still x=-10 and x=-5
Answer: |(x+10)(x+5)|=0
Answer:
70
Step-by-step explanation:
Because if their working in groups of 10 and 7 you just have to multiply them and you get 70.
Answer:
x=5
Step-by-step explanation:
<=>12x-4x=32+8<=>8x=40<=>x=40/8=5
-5.5 because 4 times -5.5 equals negative 22
Answer:
<em>5 more man should be added</em>
Step-by-step explanation:
<u>Inverse Proportion</u>
The time needed to complete a job is inversely proportional to the number of men working on it.
It means the more men working, the less time needed to complete the job.
We know 20 men can complete the job in 15 days. If the job must be completed in 12 days, then more men are needed, thus the number of men needed is:
25 men are needed which means 25-20 = 5 more men should be added.
5 more man should be added