= 30v to the power of 2 + 35x to the power of 2 - 2
Step-by-step explanation:
x=√7+√5, y=√7-√5
therefore, xy = (√7+√5)(√7-√5) = 7-5 = 2.
Hope this helps you.
Answer: the store charged $40 for the bike helmet before tax.
Step-by-step explanation:
Let x represent the amount that the store charge for the bike helmet before tax.
If the sales tax rate was 8%, it means that the amount of tax that was charge is
8/100 × x = 0.08 × x = 0.08x
Monica paid sales tax of $3.20 when she bought a new bike helmet. This means that
0.08x = 3.2
Dividing the left hand side and the right hand side of the equation by 0.08, it becomes
0.08x/0.08 = 3.2/0.08
x = 40
Answer:
C 8/5
Step-by-step explanation:
25 * what = 10
what = 10/25 = 2/5
10 * what = 4
what = 4/10 = 2/5
we are multiplying by 2/5 each time
the next term is
4 * 2/5 = 8/5