Question

1. Which of the following values make 2x2 + 5x = 7 true ?
A. X = -2
C. X = 1
B. X = 0
D. X = 5

2.What is the value of 2a - 3b - 5c when a = 3, b = - 3 and c = 4?
A. - 23
C. 5
B. - 5
D. 23

3.Which of the following equation is true when r=-1?
A. 2r-r2 = 3
C. (r - 1) (2r + 1) = 2
B. p2 + 2r = 3
D. N + 3r = -9

4. If x = -2 and y =1, what will be the value of 5y - 3x?
A.- 11
C. 1
B. -1
D. 11

5. What is the value of 4x²yz when x = 1, y = 2 and z = 3?
A. 12
C. 48
B. 24
D. 72​

Answer 1

Answer:

1. x = - 2

2. - 23

3. 2r - r = 3

4. -1

5. 48

Answer 2

Step-by-step explanation:

1.-2

2.23

3.n+3=-9

4.11

5.12