Each book is 2.4cm thick; that means if you're stacking books on top of each other, that is, on their sides, each book will be 2.4 cm tall. multiply the length of each book (2.4cm) by 21 to figure out how tall 21 books together will be. 2.4 x 21 = 50.4. the shelf needs to be at least 50.4cm tall.
Answer:
x=32
Step-by-step explanation:
I believe the angles are supplementary so you could use the equation:
2x+8 + 3x+22 = 180
5x+30=180
5x=160
x=32
Theres only 3 shapes that can form such regualr tessellations triangle square and regular hexagon so that being said triangle is your answer
To evaluate the answer of Harry:
8-(2+5)8-(2+5)
= -55
To evaluate the answer of Terry:
8-2+58-2+5
= 66
HH = -55
TT = 66
H-TH-T
5-65-5
= -65
