Answer:
Step-by-step explanation:
Alright.
Question 4:
a) area of triangle is width * length
so (2m + 3)(4m-4)
8m^2 -8m +12m -12
A = 8m^2 + 4m - 12
b) trapezoid area formula: A=[(a+b)/2](h)
where a and b are the bases.
[(x+1)+(3x+1) / 2](2x+2)
[(x+1+3x+1) / 2] ( 2x+2)
[(4x +2)/2](2x+2)
(2x + 1)(2x+2)
4x^2 + 4x + 2x + 2
A = 4x^2 + 6x + 2
Next question:
I'm not sure what is the differences of each set of data. so I'm gonna skip this question.
Next question:
5) a) notice the x values. it moves from left to right. Notice the y values, it moves from down to up. if you picture this in your mind, you're gonna conclude that the parabola opens downward.
b) Notice the x values. it moves from left to right.
notice the y values. Between -2 < x < -1 the parabola opens upward. Then from x = 0 again it opens downward.
c) notice the y values. from -2 < x < -1 as well as for x = 0 the parabold opens upward.
From 0 < x < 1 as well as for x = 2, the parabola opens downward.
