8. Which of the following means 3n + 7 = 16?
a. 7 more than 3 times a
number is 16.
b. 3 more than 7 times a
number is 16.
c. 7 less than 3 times a
number is 16.
d. 10 times a number is 16.

A

Step-by-step explanation:

3n means that you are multiplying a number n by 3. 3n+7 means adding 7 to that product. 3n+7=16 means that that sum is equivalent to 16. Hope this helps!

false

step-by-step explanation:

second option

step-by-step explanation:

the measures of a triangle equal 180. use that to find x.

2x+3x+4x=180

9x=180

9x/9=180/9

x=20

now you know x, you know angle a is 40°, angle b is 60°, angle c is 80°.

because angle a is 40°, the first option doesn't work.

because angle b is 60°, the second option does work.

when you add angle a and b, you get 100°. complementary means it equals 90°, so the third option doesn't work.

when you add angle a and c, you get 120°, which is not 100.