Since 4x/5 is the reciprocal of 1/20, that means that 4x/5 = 20/1, or 20. Using this info, we can form the equation 
. From there we can solve for x.
Firstly, multiply both sides by 5: 
Next, divide both sides by 4 and your answer will be 
Answer:
the answer is 55
Step-by-step explanation:
x + x + 90 = 180
2x + 90 = 180
2x = 180- 90 = 110
x = 110 ÷ 2 = 55
Get your calculator and put alpha n y= and you are going to subtract the opposite way and the answer will be -1/13
Answer:
Step-by-step explanation:
( 5 - x) ( 4-x )
=5(4-x)-x(4-x)
=20-5x-4x+x^2
=x^2-9x+20
hope it helps...
(ab)^4 means ab times itselv 4 times
multicplication is comutaive so
a^4b^4
2nd option is answer
