4x^3+2x-7
three terms
degree of three
2x+9= 32
2x= 32-9
2x= 23
x= 23:2
x= 11.5
Answer:
<h2><u><em>
y = 70°</em></u></h2>
Step-by-step explanation:
x = 35° (opposite agles)
y = 180 - 35 - 75
y = 70
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check 35 + 75 + 70 = 180°
the answer is good
Answer:
Step-by-step explanation:
we know that
The Susan's hourly wage, must be equal at least to the sum of her monthly household expenses divided by the number of hours worked at month
Remember that
She works 40 hours per week
so
<em>Find out the monthly household expenses</em>
Sum all the expenses
Rent+ Monthly Bills+Entertainment and Food+Savings
substitute the values
Find out the hourly wage
Answer:
z = x^3 +1
Step-by-step explanation:
Noting the squared term, it makes sense to substitute for that term:
z = x^3 +1
gives ...
16z^2 -22z -3 = 0 . . . . the quadratic you want
_____
<em>Solutions derived from that substitution</em>
Factoring gives ...
16z^2 -24z +2z -3 = 0
8z(2z -3) +1(2z -3) = 0
(8z +1)(2z -3) = 0
z = -1/8 or 3/2
Then we can find x:
x^3 +1 = -1/8
x^3 = -9/8 . . . . . subtract 1
x = (-1/2)∛9 . . . . . one of the real solutions
__
x^3 +1 = 3/2
x^3 = 1/2 = 4/8 . . . . . . subtract 1
x = (1/2)∛4 . . . . . . the other real solution
The complex solutions will be the two complex cube roots of -9/8 and the two complex cube roots of 1/2.
