Which expression can be written as 2x(4+9)? A. 2x9+4

B. 2x4+9

C. (2x9)+(2x9)

D. (2+4)+(2+9)

c

Step-by-step explanation:

so, let's go ahead and solve the equation that is in the brackets. 4+9 is 13, so you can change the (4+9) into 13.

now let's go and solve 2x13. 2x13 is 26. so let's look at each answer.

a. 2x9+4 is 22, because you're multiplying 2x9 which is 18, and then you add four. so a is incorrect.

b. 2x4+9 is 17, because you're doing the same thing like in answer a. you're multiplying 2x4 which is 8, and then you add nine. so b is incorrect.

c. ok, now we have brackets. i think you meant to put (2x4)+(2x9), so let's do those real quick. 2x9 is 18, and 2x4 is 8. 18+8 is 26. if you didn't mean to put (2x9) twice, my mistake and that answer should be 36. but as far as i know, (2x4)+(2x9) is 26. c is correct.

d. lets solve those brackets again. 2+4=6, and 2+9=11, so change the brackets to the new sums. now it should be 6+11. 6+11 is 17. d is incorrect.

x = -4

step-by-step explanation:

- 20 - 4(x + 3) = 4x

=> -20 - 4x - 12 = 4x

=> - 32 -4x = 4x

=> -32 = 4x + 4x

=> - 32 = 8x

=> -32/8 = x

=> -4 = x

step-by-step explanation:

the true ones are a b and d