Answer:
First one
Step-by-step explanation:
100+30=130 That is the rule for finding w
And z=50
Answer:
1/2 of the possibilities are even number
Step-by-step explanation:
Add all of the sides together, you get 12, count on even numbers until you get to 12. 2,4,6,8,10,12. that's six numbers which is half of 12. so half of the possibilities are even.
Let's say 6 and 12. 6 can go into 12 twice, making it a factor, and since it's half of 12, it's the GCF.
it has no solution, because the D is negative