Solve the system by substitution
-x - y - z= -8
-4x + 4y + 5z = 7
2x + 2z = 4

5/6

step-by-step explanation:

if i remember correctly with perpendicular stuff you just take away the negative

(23*2)-12=x     x=34

step-by-step explanation:

question: how many people can she serve?

answer: she can serve 16.66666667 people. so she can only give 16 people a complete serving.

question: does she have enough ice cream for her guests?

answer: no. explanation: she only has enough for 16 people to have a full serving. however, she can give a 17th person a partial serving.

answer: c.  

step-by-step explanation:

mixtures containing substances that get attracted to magnet can be separated using a magnet. we can separate iron from a mixture of sand and iron, as only iron attracts to the magnet.