All categories

3 years ago

I need help with the equation!

Mathematics

2 answers:

natka813 [3]3 years ago

8 0

I think it’s y=w-10, since I see a pattern of subtraction

fenix001 [56]3 years ago

8 0

Yo faith!

Question 3: Use the equation y= mx + b where m equals slope or the rate of change and b equals the y-intercept.

We already have b, which is 100. The reason why it's 100 is because the y-intercept is where the line crosses directly over the y-intercept. To do so, the x-value must be 0.

Thus y = mx + 100

The slope/ROC can easily be said to be -10 as the x value changes by adding 1 and the y value changes by subtracting 10. However, let's just presume that we didn't know this and couldn't use mental math.
To calculate the slope, we'll use the formula $\frac{y^2 - y^1}{x^2 - x^1}$ Take two points and insert them. I've chosen them for you:
1. (1,90)
2. (2,80)
$\frac{80 - 90}{2-1}$ ⇒ $\frac{-10}{1}$ ⇒ -10

Therefore your equation, Faith, is y = -10x + 100

Question 1 of C:
Graph - If the ordered-pair points formulate a straight line.
Table - Constant rate of change/slope for the x and y values.
Equation - No exponents are present.

Question 2 of C: Not sure what ''previous problems'' are given that they are not supplied.

You might be interested in

A 25 kg cart has 125 kg of momentume

evablogger [386]

Answer:

5 kg

Step-by-step explanation:

3 0

3 years ago

What do I have to put

saw5 [17]

Answer: for question 1, i think you have to put yes because absolute value is always positive so it´s 6.5 and the opposite of -6.5 is 6.5

Step-by-step explanation:

7 0

3 years ago

A plane flying horizontally at an altitude of "1" mi and a speed of "430" mi/h passes directly over a radar station. Find the ra

Anika [276]

Answer:

The rate at which the distance from the plane to the station is increasing when it is 2 mi away from the station is 372 mi/h.

Step-by-step explanation:

Given information:

A plane flying horizontally at an altitude of "1" mi and a speed of "430" mi/h passes directly over a radar station.

$z=1$

$\frac{dx}{dt}=430$

We need to find the rate at which the distance from the plane to the station is increasing when it is 2 mi away from the station.

$y=2$

According to Pythagoras

$hypotenuse^2=base^2+perpendicular^2$

$y^2=x^2+1^2$

$y^2=x^2+1$ .... (1)

Put z=1 and y=2, to find the value of x.

$2^2=x^2+1^2$

$4=x^2+1$

$4-1=x^2$

$3=x^2$

Taking square root both sides.

$\sqrt{3}=x$

Differentiate equation (1) with respect to t.

$2y\frac{dy}{dt}=2x\frac{dx}{dt}+0$

Divide both sides by 2.

$y\frac{dy}{dt}=x\frac{dx}{dt}$

Put $x=\sqrt{3}$ , y=2, $\frac{dx}{dt}=430$ in the above equation.

$2\frac{dy}{dt}=\sqrt{3}(430)$

Divide both sides by 2.

$\frac{dy}{dt}=\frac{\sqrt{3}(430)}{2}$

$\frac{dy}{dt}=372.390923627$

$\frac{dy}{dt}\approx 372$

Therefore the rate at which the distance from the plane to the station is increasing when it is 2 mi away from the station is 372 mi/h.

6 0

4 years ago

An urn contains 17 white balls and 18 red balls. A sample of four balls is selected at random from the urn. What is the probabil

erik [133]

Answer:

c. 0.3974

Step-by-step explanation:

Given;

number of white balls, W = 17

number of red balls, R = 18

Total number of balls, T = 35

The number of ways the event will occur is given by

= P(2 whites) and P(2 reds)

= P(2whites) x P(2 reds)

= 17C2 x 18C2

= 136 x 153

= 20,808

The total number of possible outcome

= 35C4

= 52,360

The probability = 20,808 / 52,360

= 0.3974

The correct option is "C"

6 0

3 years ago

Lin bought 1 pretzel from a snack cart that was marked $4.50. Why did she pay $4.83?

marshall27 [118]

Answer:

Sales tax

Step-by-step explanation:

You might have like 3% sales tax which is 3 percent of the original price added back onto it.

Sales tax is a tax that is put onto wanted and gourmet things, so chocolate isn't a needed item in life, so you have sales tax on it. On something like bread or meat, there might not be sales tax since you need food to survive. If something cost $100, and there is 3% sales tax, you will pay 103 dollars since 0.03 of 100 is 3.

4 0

3 years ago