Answer:
h² - 10h + <u>25</u>
Step-by-step explanation:
h² - 10h + _ → (h - 5)² = h² - 10h + 25
140 / 100 * X = 56
X = 56 * 100 / 140 = 5600 / 140 = 40
Answer:
6. 4.8m
7. a. 48 b. 31.4 c. 170
Step-by-step explanation:
6. 4.5^2 x 1.6^2 = c^2
22.81 = c^2
square root of 22.81 = 4.8
7.
a. 12^2 x 16^2 = c^2
400 = c^2
square root of 400 is 20, 20 + 12 + 16 = 48
b. 9^2 x b^2 = 13^2
88 = b^2
square root of 88 is 9.4, 9.4 + 9 + 13 = 31.4
c. 25^2 x b^2 = 65^2
3600 = c^2
square root of 3600 is 60, 60 + 60 + 25 + 25 = 170
If it’s a triangle then it has to equal 180
so 48+54+x=180
48+54=102
180-102=x
x=78
Answer: A
Step-by-step explanation: She rides slowly uphill for 5 minutes when she first leaves her house, then speeds up and rides at a consistent speed on flat road for 15 minutes. The last 7 minutes of her ride, she goes faster and faster, then rides downhill until she arrives at school.