Answer this question?

b = -10

<M = 90

<N = 50

<O =  40

Step-by-step explanation:

The sum of the angles of a triangle add to 180

<M + <N + <O = 180

90 + -3b+20  + -3b +10 = 180

Combine like terms

120 -6b = 180

Subtract 120 from each side

120-120 -6b = 180-120

-6b = 60

Divide by -6

-6b/-6 = 60/-6

b = -10

<M = 90

<N = -3b +20 = -3(-10) +20 = 30+20 = 50

<O = -3b +10 = -3(-10)+10 = 30+10 = 40

7 weeks

step-by-step explanation:

convert each fraction to the least common multiple of 20, so 3/4 = 15/20 & 1/10 = 2/20, then divide 15 by 2 and you get a little over 7, so the food will last 7 weeks.

1. sometimes

2. never true

3. sometimes

step-by-step explanation:

these are pretty self explanatory if you know what supp right and com angles are