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4 years ago

12

What is y=1/2x-3 on a graph

2 answers:

Alexeev081 [22]4 years ago

8 0

The points are (0,-3) and (6,0). i attached a picture of the graph as well

Anvisha [2.4K]4 years ago

7 0

This needs a graph to solve

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If y varies inversely as x, and y=20 as x=3, find y for the x value 4

Ratling [72]

$\bf \qquad \qquad \textit{inverse proportional variation}\\\\
\textit{\underline{y} varies inversely with \underline{x}}\qquad \qquad y=\cfrac{k}{x}\impliedby 
\begin{array}{llll}
k=constant\ of\\
\qquad variation
\end{array}\\\\
-------------------------------\\\\
\begin{cases}
y=20\\
x=3
\end{cases}\implies 20=\cfrac{k}{3}\implies 20\cdot 3=k\implies 60=k
\\\\\\
thus\qquad \boxed{y=\cfrac{60}{x}}\\\\
-------------------------------\\\\
now\qquad x=4\qquad y=\cfrac{60}{4}$

5 0

3 years ago

Compare the rates of change of the following items

Triss [41]

Answer:

B. The rate of change of item I is equal to the rate of change of item II.

Step-by-step explanation:

The rate of change can be calculated using formula

$\dfrac{b_2-b_1}{a_2-a_1},$

where $(a_1,b_1)$ and $(a_2,b_2)$ are two points on the line.

<u>Item I:</u>

$(a_1,b_1)=(0,2)\\ \\(a_2,b_2)=(2,2)$

Then the rate of change is

$\dfrac{2-2}{2-0}=\dfrac{0}{2}=0$

<u>Item II:</u>

Chosse two points the line passes through. For example, (0,-3) and (1,-3).

$(a_1,b_1)=(0,-3)\\ \\(a_2,b_2)=(1,-3)$

Then the rate of change is

$\dfrac{-3-(-3)}{1-0}=\dfrac{0}{1}=0$

Hence, the rate of change of item I is equal to the rate of change of item II.

6 0

3 years ago

Please answer this in two minutes

Anestetic [448]

Answer:

Step-by-step explanation:

In an isosceles trapezoid, two pairs of adjacent angles are supplementary. It means that the sum of the adjacent angles is 180°

Looking at the diagram, angle X and angle W are adjacent angles. It means that

X + W = 180

Since X = 105, then

105 + W = 180

W = 180 - 105 = 75°

Since W = b + 25°, then

b + 25° = 75

b = 75 - 25 = 50°

8 0

4 years ago

The revenue, in dollars, of a company that makes toy cars can be modeled by the polynomial 3x2 + 4x – 60. The cost, in dollars,

Tems11 [23]

For this case we have the following quadratic functions:

Revenue: $3x ^ 2 + 4x - 60$

Cost: $3x ^ 2 - x + 200$

Then, we observe that the profit is given by the following mathematical relationship:

$Profit = Revenue - Cost$

Substituting values we have:

$Profit = (3x ^ 2 + 4x - 60) - (3x ^ 2 - x + 200)$

Making the corresponding calculations we have:

$Profit = x ^ 2 (3-3) + x (4 + 1) + (-60-200)\\Profit = 5x - 260$

Answer:

An expression that represents the profit is:

$Profit = 5x - 260$

4 0

3 years ago

Read 2 more answers

I need help pleaseeee, anyone?!!

Black_prince [1.1K]

Answer:

a or d

Step-by-step explanation:

5 0

3 years ago