Because both angles are 90° and 90+90=180
You need to use the cosine for this and this is how you do it.
Answer:
to calculate a 18 percent tip on a $105 bill.
What should I tip on 105 dollars? How much is the tip for $105?
Tip $18.90
Total $123.90
Step-by-step explanation:
Put the percentage in decimal form (0.18) then multiply the cost by this number. 26.50 * 0.18 = 4.77. So your tip is $4.77.
Answer:
x=-32
Step-by-step explanation:
expand -2(x+10): -2x-20
x-2x -20=12
add similar elements: x-2x=-x
x-20=12
add 20 to both sides
-x-20+20=12+20
simplify
-x=32
divide both sides by -1
x=-32
:
Answer:
600 volts
Step-by-step explanation:
Given =
A = 12 ampere
V = 480 volts
A2 = 15 ampere
Solution =
R = V/I
= 480 / 12
= 40 ohms
R = V / I
V = R x I
= 40 x 15
= 600 volts