Answer:
B.) 
Step-by-step explanation:
use the slope rule

Fill in values

Simplify

Simplify further

Done.
Answer:
A
Step-by-step explanation:
Hey there!
Let us take Michael's score as ' x '
Let us take Kathryn's score as ' y '
Michael - 70 less than twice Kathryn's
x = 2y - 70
y = y
Add them, we get , 425
2y - 70 + y = 425
3y - 70 = 425
3y = 495
y = 495/3
y = 165
Kathryn's score = 165
Michael - 2 ( 165 ) - 70
= 260
Hope it helps!
Its C. i put my best guess into it even tho i kinda suck at geometry <span />
Given:
limit of $36 and 20 pounds of food in his back pack
pasta : 1 pound package @ $1
pasta sauce: 1.5 pound jar @ $3
x = number of pasta package
y = number of jar of pasta sauce
Constraint on the weight:
x + 1.5y <u><</u> 20
Constraint on the cost of purchase.
x + 3y <u><</u> 36