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3 years ago

Three oranges cost $1.35 at this rate how much do five oranges cost

Mathematics

1 answer:

Verdich [7]3 years ago

3 0

Answer:

ask the shop keeper

Step-by-step explanation:

he might know

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Kevin earned $18 for babysitting 6 hours. Which equation below represents the relationship between dollars earned (d) and hours

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In a bag of marbles 12% were red, 14% were blue , and the rest where white. If the bag has 250 marbles, how many were red or blu

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Ok so, im sure if this is the right answer, but Im thinking there were 224% of red (or) blue marbles. If this is right, There you go, but if it's not, Im so sorry

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3 years ago

The quantity demanded x of a certain brand of DVD player is 3000/week when the unit price p is $485. For each decrease in unit p

Julli [10]

Answer:

a) Demand equation : $y=-\frac{2}{25}x+725$

b) Supply equation : $y=\frac{7}{100}x+350$

C) The equilibrium quantity and the equilibrium price are 2500 and $ 525 respectively

Step-by-step explanation:

We are given that For each decrease in unit price of $20 below $485, the quantity demanded increases by 250 units.

Since decrease in unit price of $20 increase demand by 250 units

So, Slope = $\frac{-20}{250}=\frac{-2}{25}$

We are given that The quantity demanded x of a certain brand of DVD player is 3000/week when the unit price p is $485.

Now for demand equation:

Use point slope form : $y-y_1=m(x-x_1)$

So, $y-485=\frac{-2}{25}(x-3000)\\y=-\frac{2}{25}x+725$

a)So, Demand equation : $y=-\frac{2}{25}x+725$

Now to find supply equation

We have two points (0,350) and (2500,525)

$(x_1,y_1)=(0,350)\\(x_2,y_2)=(2500,525)\\y-y_1=\frac{y_2-y_1}{x_2-x_1}(x-x_1)\\y-350=\frac{525-350}{2500-0}(x-0)\\y-350=\frac{7}{100}x\\y=\frac{7}{100}x+350$

b) So, Supply equation : $y=\frac{7}{100}x+350$

Now to find equilibrium quantity and price equate demand and supply equation

$-\frac{2}{25}x+725=\frac{7}{100}x+350\\725-350=\frac{7}{100}x+\frac{2}{25}x\\x=2500$

So, equilibrium quantity = 2500

To find equilibrium price substitute equilibrium quantity in any equation

$y=\frac{7}{100}x+350\\y=\frac{7}{100}(2500)+350\\y=525$

C) The equilibrium quantity and the equilibrium price are 2500 and $ 525 respectively

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4 years ago

What is the equation of the line that passes through (4, -1)

Mekhanik [1.2K]

Answer:

Step-by-step explanation:

answer: y = -5 + 19

We can use the point-slope formula to find an equation to solve this problem. The point-slope formula states: (y−y1)=m(x−x1)

Where m is the slope and (x1y1) is a point the line passes through.

Susbtituting the slope and values from the point from the problem gives:

(y−−1)=−5(x−4)

(y+1)=−5(x−4)

We can also solve this for the slope-intercept form. The slope-intercept form of a linear equation is: y=mx+b

Where m is the slope and b is the y-intercept value.

Substitute the slope from the problem for m and the values of the point from the problem for x and y and solve for b:

−1=(−5⋅4)+b

−1=−20+b

20−1=20−20+b

19=0+b

19=b

We can substitute for m and b in the formula to find the equation:

y=−5x+19

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2 years ago

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