The two negatives cancel out, so it would just mean 1+18, which is 19.
Δ FCD is a right triangle ( 3² + 4² + 5² ).
10 : EB = 5 : 3
5 EB = 30
EB = 6
With Pythagorean theorem:
CE² = 10² - 6² = 10 - 36 = 64
CE = 8
ED = 5
AB = 2 · 5 = 10
Answer: The length of the side AB is 10.
300 people, I think. One fourth of 1,200 is 300.
Answer:
Step-by-step explanation:
Alright all we need to know is to understand our brackets
So 3+{2×(8-4+6)}-5-{9+4-[3×(1-5)]}
3+20-5-9+4-3(1-5)
Step 2
3+20-5-9+4-3(1-5) Simplify
18-9+4-3(1-5)
Step 3
18-9+4-3(1-5)
13-3(1-5)
13-(-12) Here is the tricky part (We aren't going to subtract because the brackets multiply the equations
So,
13+12=25
Your answer is 25
Answer:
14.1m above the sea level.
Step-by-step explanation:
h(t)=−4.9t²+4t+15, t in seconds
When t=0s, h(0)=15m (height of cliff), so it means that h is measured from the sea level.
After 1 second: h(1)=-4.9+4+15=14.1m above the sea level.
