Nigel is planning his training schedule for a marathon over a 4-day period. he is uncertain how many miles he will run on two days. one expression for the total miles he will run is 12+y+17+z. use the commutative property to write an equivalent expression.

d

step-by-step explanation:

the answer is simply just 6n add the two together as they have an n

answer: about 22.67

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.