Answer:
length=76 width=34
Step-by-step explanation:
to get the length on one side the equation is 2w+8 and the width is w so times them both by two to solve for all sides it is:
2w+8+2w+8+w+w which simplifies to 6w+16
if the perimeter is 220 it is 6w+16=220
you then minus 16 from both sides and get: 6w=204
next you divide both sides by 6 to get w= 34
if w=34 on one side and the length is 2w+8 you substitute the w for 34
2(34)+8 which equals 76
Move one to the other side of the equal sign
Area of a semi-circle = 1/2 x x r square.
area of larger semi circle
= 1/2 x x 10 square
= 50
area of smaller semi circle
= 1/2 x x 5 square
= 12.5
Total area = 50 + 12.5 = 196 cm square ( to 3 sf ) or 62.5
Answer:
10x² - 12
Step-by-step explanation:
4x² - 7 + 6x² - 5 (combine like terms)
10x² - 12
mean:20+17+10+31+25+18+12=132÷7=18.8
Media:10,12,17,18,20,25,31=
18÷1
= 18
mode=0
Range=31-10=21