We have an equation: 13/?= 26/100
Cross multiply:
26*?= 13*100
⇒ ?= 13*100/26= 50
13 is 26% of 50~
Answer:
(x-3)
Step-by-step explanation:
we have

step 1
Simplify the numerator
Complete the square
Equate the equation to zero




Rewrite as perfect squares

Take square root both sides




therefore

substitute in the numerator


<span>Just multiply both sides by 5</span>
Use the proportions property:
775 times ---------- 180 sec
x ---------- 1 sec