Answer:
one solution : (-2 ; -7)
Step-by-step explanation:
hello :
x - y = 5
....(*)
- 3 x + y = - 1 ....(**)
by (*) : y=x-5
by(**) : y = 3x-1
3x-1 = x -5
3x-x=-5+1
2x= -4
x= -2
but : y = x-5 so : y= -2-5=-7
one solution : (-2 ; -7)
Answer:
the sales tax percent is therefore: 7.75%
Step-by-step explanation:
The sales tax she paid is $69.75, for a sofa whose sale price is $899.99.
Since $69.75 is the unknown (x) percent of $899.99, then we write this statement in math terms as:
69.75 = x * 899.99
solving for x we get:
x = 69.75 / 899.99
x = 0.0775
this is the decimal form of the percent, and in order to write it as percent, we multiply it by 100:
the sales tax percent is therefore: 7.75%
Answer:
The answer is 1/10. Mark as brainliest ^-^
Step-by-step explanation:
Answer:
Step-by-step explanation:
density of oil, d = 30 lb/ft³
Volume of tank, V = l x w x h = 1 x 2 x 1 = 2 ft³
mass of oil, m = Volume x density of oil = 1 x 30 = 30 lb
Work = m x g x h = 30 x 32 x 3 = 2880 units
