1/2 x = 20
x = 2 x 20 = 40
Answer:
47/100
Step-by-step explanation:
It is already in fraction form.
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For this case what we have to take into account is the following variable:
x = represent the unknown number
We now write the following inequality:
"four times the sum of number and 15 is at least 20"
4 (x + 15)> = 20
We clear the value of x:
(x + 15)> = 20/4
(x + 15)> = 5
x> = 5 - 15
x> = - 10
The solution set is:
[-10, inf)
Answer:
all possible values for X are:
[-10, inf)
Answer:
the first one is no it's nonproportional
and the second one it yes its proportional
