Answer: x = 27Solution, showing all steps:1) equation:

2) Clear the square root:
=>

=>

3) Square both sides of the equality:
=>

4) Clear x:
2x = 64 - 10
2x = 54
x = 54 / 2
x = 27.
5) Verify that this is not a straneous solutio, by replacing the solution in the equation:
The answer is 675 if you don't know standard then you can use lattice.
Answer:
Step-by-step explanation:
Cost price = $n
Mark up price = selling price- cost price
= (20% × $n)
Selling price = $n + (20% × $n)
Sales tax = 5% × ($n + (20% × $n))
Total cost = selling price + sales tax
Total cost = $n + (20% × $n) + 5% × $n + (20% × $n)
= 1.2 × $n + 0.06 × $n
= 1.26 × $n.
I think the answers is 80
Answer:
D
Step-by-step explanation:
The area (A) of a trapezoid is calculated as
A = 0.5h(a + b)
where h is the perpendicular height and a, b the parallel sides.
Given A = 120, then
0.5 × 8(a + b) = 120, that is
4(a + b) = 120 ( divide both sides by 4 )
a + b = 30 cm → D