Answer:
h ≈2.55
Step-by-step explanation:
h=3·
h=3
* 96/pi*6^2
≈2.54648
Answer:
(A) $500,000
Step-by-step explanation:
Given formula for finding the cost ( in dollars ) to remove p percent of a certain pollutant,
If P = 90,
If P = 80,
∵ 900000 - 400000 = 500000,
Hence, it will cost $500,000 more to remove 90% of the pollutant from the pond than it would cost to remove 80% of the pollutant,
Option '(A)' is correct.
Answer:
Miles he drove on highway = 180 miles
Miles he drove in the city = 217 miles
Step-by-step explanation:
Lets assume that gallon used on highway = x
Miles driven on highway = y
(I) 36 miles per gallon on the highway.
36x = y equation 1
(II) 31 miles per gallon in the city.He recently drove 397 miles on 12 gallons of gasoline
31(12-x)= 397-y equation 2
372-31x= 397-y
Combine the constants:
-31x= 397-372-y
y-31x = 25
Now substitute the value of equation 1 in equation 2
y-31x=25
36x-31x=25
5x=25
Now divide both sides by 5
5x/5=25/5
x=5
Now substitute the value x=5 in equation 1
36x=y
36(5)=y
180= y
Now subtract the miles driven on highway from recently drove miles to get the miles driven in the city.
397-y = 389 - 180
= 217
Therefore,
Miles he drove on highway = 180 miles
Miles he drove in the city = 217 miles ....
Re-write
8x + 14y = 4 (1)
-6x - 7y = -10 (2)
multiply (1) by 3 and (2) by 4
now you have
24x + 42y = 12
-24x - 28y = -40
-------------------------add
14y = -28
y = -2
8x + 14y = 4
8x + 14(-2) = 4
8x - 28 = 4
8x = 32
x = 4
answer
x = 4 and y= -2
Answer:
k = 3
Step-by-step explanation:
Step 1: Simplify both sides of the equation.
Step 2: Add 79 to both sides.
Step 3: Divide both sides by 2.
