Answer:
9
Step-by-step explanation:
7r+18=r²
r²-7r-18=0
factorizing
r²+2r-9r-18=0
r(r+2)-9(r+2=0
(r-9)(r+2)=0
r-9=0
r=9
check
(r²)=(9*9)=81
7r+18=7(9) + 8=81
Doubling every 3 years, meaning 200% every 3 years.
The answer is 24 years.
Hope this helps. - M
Answer:
0.6 feet
Step-by-step explanation:
We solve this question using the Trigonometric function of Tangent.
tan θ = Opposite/Adjacent.
Where:
Opposite = Height /Length of the ramp = ?
Adjacent = Distance from the base of the ramp = 4 feet
θ = 8.1°
Therefore,
tan 8.1° = x/4
Cross Multiply
x = tan 8.1 × 4
x = 0.5692843028 feet
Approximately = 0.6 feet
Length of the ramp = 0.6 feet.
Answer: 143.81
Explanation:
Calculate the discounted price:
165.89 x 10.9/100 = 18.08$
Subtract the discounted price from the original price:
165.89 - 18.08 = 143.81$
143.81 is the price of their best oar’s sale on Leif Erickson day.
