Answer:
38
Step-by-step explanation:
y(y+5)=84
y^2+5y-84=0
Δ=5^2-4*1*(-84)=25+336=361
VΔ=19
y1=(-5+19)/2=7
so P=2*7+2*(7+5)=14+2*12=14+24=38 cm
Answer:
a
Step-by-step explanation:
something are very complex
Answer:
Both answers are C!!!
Step-by-step explanation:
Im so lucky, I guessed and got them both right on the usatestpreptest.
answer 1: petri dish A will have a density of 19.6
answer 2: Petri dish A by 3.3 bacteria/mm
Answer: The lorry is traveling 10 mph over the expected speed.
Step-by-step explanation:
If 200 miles takes 4 hours, the speed is 200mi/4hr which is 50 mph.
If the distance is increased by 20%, the distance is 240 miles.
240mi/4hr = 60mph
The difference is 10mph
Answer:
9 , 15
Step-by-step explanation:
HCF = 3
LCM = 45
Product of two numbers = HCF * LCM
= 3*45
= 135
The two numbers are the factors of 135
9 * 15 = 135
9 = 3*3
15 = 3 * 5
HCF = 3
LCM = 3* 3 * 5 = 45