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Komok [63]
3 years ago
15

Help please I asp !!!

Mathematics
1 answer:
Mice21 [21]3 years ago
8 0

Answer:

Step-by-step explanation:

1

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A hose fills an empty fish tank with 24 gallons of water in 8 minutes. At that same rate, how many minutes will it take the hose
kolezko [41]

Answer:

\frac{8}{24} = \frac{x}{60}

24x = 8*60

24x = 480

x = 20

Step-by-step explanation:

3 0
3 years ago
Equation by elimination<br>-4x-9y=20<br>-2x-9y=-24
storchak [24]
I'm not 100% sure this is right but I think this is how you do it

5 0
3 years ago
A blouse that cost $16.85 is on sale for 45% off. What is the amount of the discount?
spin [16.1K]
The amount of the discount is $7.59 
8 0
3 years ago
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The cost, C, to produce b baseball bats per day is modeled by the function C(b) = 0.06b2 – 7.2b + 390. What number of bats shoul
kozerog [31]

Check the picture below, that's just an example of a parabola opening upwards.

so the cost equation C(b), which is a quadratic with a positive leading term's coefficient, has the graph of a parabola like the one in the picture, so the cost goes down and down and down, reaches the vertex or namely the minimum, and then goes back up.

bearing in mind that the quantity will be on the x-axis and the cost amount is over the y-axis, what are the coordinates of the vertex of this parabola?  namely, at what cost for how many bats?

\bf \textit{vertex of a vertical parabola, using coefficients} \\\\ C(b) = \stackrel{\stackrel{a}{\downarrow }}{0.06}b^2\stackrel{\stackrel{b}{\downarrow }}{-7.2}b\stackrel{\stackrel{c}{\downarrow }}{+390} \qquad \qquad \left(-\cfrac{ b}{2 a}~~~~ ,~~~~ c-\cfrac{ b^2}{4 a}\right)

\bf \left( -\cfrac{-7.2}{2(0.06)}~~,~~390-\cfrac{(-7.2)^2}{4(0.06)} \right)\implies (60~~,~~390-216) \\\\[-0.35em] \rule{34em}{0.25pt}\\\\ ~\hfill (\stackrel{\textit{number of bats}}{60}~~,~~\stackrel{\textit{total cost}}{174})~\hfill

6 0
3 years ago
In need help quick and can you also explain how you did or what I'm supposed to be doing
Harman [31]
-45x+72
you multiply the 9 by everything in the parentheses
3 0
3 years ago
Read 2 more answers
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