Simplify math equations
1) -13.5a + 34.12b + 65.5a - 32.5b - 35.8a

a) 32.5a + 20.47b
b) 16.2a + 1.62b
c) -18.7a - 26b
d)1.62a + 16.2b

2) 4.2 (3.9r - 5.9s) + 7.9s - 9.53r

a) 16.88r + 6.85s
b) 10.82r + 31.15s
c) 10.82r - 31.15s
d) 6.85r - 16.88s

3) 7p + 20 - 13q - 4q - 18 + 6p

a) 13p + 17q - 2
b) 13p - 17q + 2
c) 3q + 38
d) 3q - 6

4) -15 + 23r + 9r^2 - 16r + 10

a) 9r^ - 10 - 7r
b) 16r^2 - 5
c) 9r^2 - 7r^2 - 5
d) 9r^2 + 7r - 5

5) 5x (3 - 12x) - 3 (4 - 20x^2)

a) 15x - 12
b)15x^2 - 60x
c)60x^2 - 15x
d) 15x^2 - 12x

6) 2/3 × - 4/6 + × + y

a) 5/3x + 5/9y
b) 5/9x + 5/3y
c) 3/5x + 9/5y
d)9/5x + 3/5y

Which function in vertex form is equivalent to f(x) = x2 + 6x + 3? f(x) = (x + 3)2 + 3 f(x) = (x + 3)2 − 6 f(x) = (x + 6)2 + 3 f(x) = (x + 6)2 − 6

Given are five observations for two variables, x and y. xi 1 2 3 4 5 yi 3 7 5 11 14 which of the following is a scatter diagrams accurately represents the data? what does the scatter diagram developed in part (a) indicate about the relationship between the two variables? try to approximate the relationship betwen x and y by drawing a straight line through the data. which of the following is a scatter diagrams accurately represents the data? develop the estimated regression equation by computing the values of b 0 and b 1 using equations (14.6) and (14.7) (to 1 decimal). = + x use the estimated regression equation to predict the value of y when x = 4 (to 1 decimal). =

Determine if the solution set for the system of equations shown is the empty set, contains one point or is infinite. x + y = 5 x + y = 7 {} 1 solution infinite