Answer:
20 less than a number is equal to the number.
Step-by-step explanation:
Expand
x^2+3x-10=18
minus 18 both sides
x^2+3x-28=0
find what 2 numbers mutiply to -28 and add to 3
7 and -3
(x+7)(x-3)=0
set each to zero
x+7=0
x=-7
x-3=0
x=3
x=-7 and 3
Answer:
y = -248
Step-by-step explanation:
Hi there!
Set up a proportion:

Cross-multiply:

I hope this helps!
2x-1=5
2(3)-1=5
6-1=5
5=5
x=3
Answer:
volume 1050 
surface area 859 
Step-by-step explanation:
volume is length times width times height (7*25*12)/2
surface area is area of all the sides added together
2(25*12)+(12*7)+ 2(
)