Step-by-step explanation:
x+y=7 _ eqn1
x-y=3_ eqn2
add eqn1 and eqn2
x+y=7
+ x-y=3
= 2x= 10
x=5
x+y=7
5+y=7
y=7-5
y=2 proved
Answer:
-7
Step-by-step explanation:
Answer:
its the third one
Step-by-step explanation:
Answer: it’s a
Step-by-step explanation:
A=base*height*1/2 OR A=base*height/2
A=8*7/2
A=28