Simplest way to do this:
number of books= 120
percentage represented by 120= 100%
increase current percent by 55%= 155%
: . 55% increase = original number of books * (155%)
= 120 * (155/100)
= 186
Yes the ratio of a right angle is 1:4
Try this option:
1. rule: cosα=sin(90°-α), it means that cos 3x=sin(90°-3x);
2. sin(90°-3x)=sin(x+18°); ⇔ 90°-3x=18°+x; ⇔ x=18°.
Answer: x=18°.
Answer:
D. Each polygon has two pairs of congruent sides that are adjacent.
Subtract 3 from 28 to get 75. Then since 2w symbolizes multiplication you do the opposite, you divide 75 by 2 to get 37.5. So w=37.5
