You can find the x intercept by setting y to 0 and factor the equation.
0=2x^3+3x-2
0=(2x-1)(x+2)
We can make this equation =0 if x is -2 and 1/2.
So the x intercepts are (-2,0) and (0.5,0)
Answer:
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Answer:
2/5
Step-by-step explanation:
The slope of a line is given by
m = (y2-y1)/(x2-x1)
= (4-2)/(3--2)
= (4-2)/(3+2)
=2/5
The sale price was 30% off the original price, which means it was on sale for 70% of the original cost ( 100% - 30% = 70%)
To find the original cost, divide the sale price by the percent of the original cost:
21 / 0.70 = 30
The original price was $30
check:
30 x 0.3 = 9 ( amount of discount)
30 - 9 = 21 ( sale price)
Answer:
19.50
Step-by-step explanation:
just trust me
