Answer:
1240 students
Step-by-step explanation:
not sure but I'm pretty sure its right.
Let x be price of apples per pound and y be price of potatoes per pound.
We can set a system of equations by our given information as:
Now we will use substitution method to solve our system of equations.
From equation 2 we will get,
Upon substituting value of x in equation 1 we will get,
Therefore, price of potatoes will be $0.99 per pound.
Now let us find price of apples by substituting y=0.99 in equation 2.
Therefore, price of apples will be $1.49 per pound.
Answer:
Step-by-step explanation:
The profit function is:
Where
P is the profit
and
d is the number of units sold
Now, there is a 50% increase in number of units sold, so d will become:
50% = 50/100 = 0.5
d + 0.5d = 1.5d
So, we have to replace "d" with "1.5d" in the function, which makes it:
From the equations shown, last answer choice is correct.
notice above... we use the decimal format for the percentage, thus 20% is really just 20/100, 40% is 40/100 and so on.
so.. whatever "x" and "y" amounts are, we know they have to add up to 60 Liters, that is x+y = 60
and whatever the concentration amount of each is, it must add up to (60)(0.40), that is 0.20x+0.50y=(60)(0.40)
thus
solve for "x", to see how much of the 20% solution will be needed
what about "y"? well, y = 60 - x
Answer:
B (the second number line)
Step-by-step explanation:
= 7, so would be close to 7