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3 years ago

Which table represents a function? plz hurty up and answer this

Mathematics

1 answer:

azamat3 years ago

5 0

Answer:

Top Right

Step-by-step explanation:

Process of elimination works best here:

It can't be the top left or bottom left because for something to be a function of [tex]x [\tex], the same [tex]x[\tex] can't produce different [tex]y[\tex] values. As for the bottom right, just look at it.

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Using the graph below, find r(-3) please

ruslelena [56]

Considering the given graph, it is found that the numeric value of the function r(x) at x = -3 is of 2.

<h3>How to find the numeric value of a function given it's graph?</h3>

The numeric value of a function is the value of y for the given value of x, hence, we have to look at the value of x on the horizontal axis, and verify the equivalent value of y on the vertical axis.

In this problem, when the horizontal axis is of x = -3, the vertical axis is of y = 2, hence the numeric value of the function r(x) at x = -3 is of 2.

More can be learned about the numeric value of a function at brainly.com/question/14556096

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7 0

2 years ago

Suppose xy=4 and dy/dt=-2. Find dx/dt when x=-3

nirvana33 [79]

Dy/dx = dy/dt * dt/dx

xy = 4

y + x(dy/dx) = 0 by implicit differentiation.

x(dy/dx) = -y

dy/dx = -y/x

<span>dy/dx = dy/dt * dt/dx dy/dt = -2
</span>
<span>-y/x = -2 * dt/dx
</span>
y/(2x) = dt/dx

dt/dx = y/(2x)

dx/dt = 2x/y

When x = -3, xy = 4, y = 4/x = 4/-3 = -4/3

dx/dt = 2*-3/(-4/3) = -6 *-3/4 = 18/4 = 9/2 = 4.5

dx/dt = 4.5

3 0

3 years ago

Read 2 more answers

Your state charges 5% sales tax on nonfood items. You're buying a light bulb for $3.00, cereal for

dimulka [17.4K]

We first add the tax to the non-food items. We have ($3.00+$.50)*1.05=($3.50)*1.05=$3.675 (Which can be rounded up to $3.68, since we can't have a fraction of a cent).

Now, we add the cost of the food to $3.68. As a result, we have $3.68+$2.50=$6.18 as the total bill.

6 0

4 years ago

The student council is selling cookies.They buy the cookies from the store for .55 cents each.They sell the cookies for $1 each.

aleksley [76]

Answer:

The percentage of the markup is 82%

Step-by-step explanation:

In this question, we are asked to calculate the percentage of mark up. This is simply calculating the percentage of the profit margin.

firstly to be able to calculate this percentage, we need to know the value of the profit margin itself.

mathematically, the profit margin is selling price - cost price

From the question, the selling price is $1 while the cost price is 55 cents

The profit margin is thus $1 - 55 cents = 45 cents

We now proceed to calculate the percentage profit

mathematically, that is profit/cost price * 100%

That would be 45 cents/55 cents * 100 = 9/11 * 100% = 81.8 approximately 82%

7 0

3 years ago

Which graph represents the function y = 2x – 4? A coordinate plane with a line passing through (negative 4, 0) and (0, 2). A coo

VARVARA [1.3K]

Answer:

The third option: "A coordinate plane with a line passing through (0, negative 4) and (2, 0)."

Step-by-step explanation:

Use the equation defined by the function: y = 2x - 4 to check the (x, y) values they give you. If they both render true mathematical statements, those are indeed points on the plane that belong to the given line.

For the third case; the pairs (0,-4) and (2,0), both satisfy the equation of the line that is given.

For (0,-4): y = 2x - 4 becomes:

$(-4)=2(0)-4\\-4=0-4\\-4=-4$ which is a TRUE statement

For (2,0): y = 2x - 4 becomes:

$(0)=2(2)-4\\0=4-4\\0=0$ which is also a TRUE statement.

This option is the only one that verifies both given points as truly being part of the given line.

8 0

3 years ago

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