Answer:
38
Step-by-step explanation:
y(y+5)=84
y^2+5y-84=0
Δ=5^2-4*1*(-84)=25+336=361
VΔ=19
y1=(-5+19)/2=7
so P=2*7+2*(7+5)=14+2*12=14+24=38 cm
If x = -7 then
<span>-3x+6y=-21
</span><span>-3(-7) +6y = -21
21 + 6y = -21
6y = -42
y = -7</span>
M + 5q
(1) + 5(5)
1 + 10
= 11
20 a: x = 5
20 b: x = 12
17 c: 30
540 is the answer because you multiply 3 times 10 times 18 or whatever order you want and you'll get 540 so that's your answer
