Answer:
-35x³ - 39x² + 25x
Step-by-step explanation:
First write out the equation which is (5x - 3x²) - (5x - 2)(10x + 7x²). Then distribute 5x - 3x² to -(50x² + 35x³ - 20x - 14x²). After that, combine the like terms and don't forget to distribute the negative as well, 5x - 3x² - 36x² - 35x³ + 20x. Lastly combine all the like terms to end up with this -35x³ - 39x² + 25x.
Hope this helps :)
Answer:
a) May be used to predict a value of y if the corresponding x value is given
Step-by-step explanation:
In regression analysis, the vertical distance from the regression line to the data points can be minimized using the least square regression line.
Given the example of a least square regression equation:
y = ax + b
Where
a = slope
b = Y-intercept
If the value of x is known, the value of y may be predicted.
Option A is correct.
A least squares regression line may be used to predict a value of y if the corresponding x value is given
Answer:
D
Step-by-step explanation:
C I'm pretty sure even though the real answer is 1979 so its d or c
Answer:
x=5/9
Step-by-step explanation:
-7x-3x+2=8x-8
Add -7x-3x.
-10x+2=8x-8
Add -10x on both sides (to cancel out the -10x on the left side)
2=18x-8
Add 8 on both sides (to cancel the -8)
10=18x
Divide 18 on both sides
10/18 simplified is 5/9.
x=5/9