Using the rule y = 3x + 4, find the value of y when x is 2. a) 9 b) 10 c) 11 d) 12 using the rule y = 8x + 5, find the value of y when x is 6. a) 19 b) 43 c) 50 d) 53 if y = 3x + 5, what is the value of y when x = 12? a) 17 b) 20 c) 31 d) 41 use substitution to determine whether the value for x is a solution for the equation. 3x + 10 = 25 x = 5 5x − 10 = 25 x = 6 6x − 18 = 6 x = 4 4x + 12 = 40 x = 7 8x + 12 = 28 x = 3

option B

option D

option D

Correct

incorrect

correct

correct

incorrect

Step-by-step explanation:

1) y = 3x + 4    with  x = 2

y = 3(2) + 4= 10   option B

2) y = 8x + 5    with  x = 6

y = 8(6) + 5= 53   option D

3) y = 3x + 5    with  x = 12

y = 3(12) + 5= 41   option D

Use substitution to determine whether the value for x is a solution for the equation

3x + 10 = 25    With x = 5

3(5) + 10 = 25      it is correct

5x − 10 = 25    With x = 6

5(6) − 10 = 25     it is not correct

6x − 18 = 6     With x = 4

6(4) − 18 = 6     it is correct

4x + 12 = 40     With x = 7

4(7) + 12 = 40    it is correct

8x + 12 = 28     With x = 3

8(3) + 12 = 28   it is not correct

step-by-step explanation:

subtract 7, so the answer is x < = 3, or c.

answer:  

step-by-step explanation:

here x represents the height of the pole,

and, the height of the shadow of the pole is 12 feet.

also, the angle of elevation from the top of the pole is 40°,

therefore,

by the low of sine,

which is the required equation for finding the value of x,