Answer:
maybe y= 9 because side A B is 10 and side C D is almost the same just sleep slightly shorter.
It is 3 1/8 because 9.2 is a decimal and a fraction is 3 1/8 and a mixed fraction is 3 7/8
Answer:
x=-8 and y=9
Step-by-step explanation:
rewrite the equations to x+2y=10,3x+4y=12
sub 2y from both sides x+2y-2y=10-2y
substitue x=10-2y in 3x +4y=12
3(-2y+10)+4y=12
distribute
add-30 to both sides
divide both sides by -2
y=9
sustitute 9 for y in -2y+10=x
x=-8
Answer:90
Step-by-step explanation:
My reasoning is because it makes a right angle and a right angle is equivalent to 90 degrees
