MATHEMATICS MIDDLE SCHOOL

List your favorite ytbers I just wanna see if anybody watches the same people as me

Answers

Answer 1

Answer:

Jess & Gabriel

The LaBrant Family

The Tiny Tribe

LaurDIY

Alex Wassabi

And i watch other ytbers but rarely.

Answer 2

Answer: Idubbbz, yms, ihe, h3h3, pyro, birdman, psychedsubstance, jaboody dubs

Related Questions

It is to 2:10 p.m. What is the time that is 7 hours and 20 minutes before the time shown
a spinner is divided into five equal sections labeled 1 to 5. What is the probability that the spinner will land on 3?
Factor completely 2x3 + x2 - 18x – 9.
What fraction is equal to 3/5
As Ruth Ann is researching careers, she decides she enjoys living in her hometown and doesn’t want to relocate. Which factor might have a strong impact on her career decisions? the career’s location the career’s average salary the career’s outlook the career’s employee benefits

Duffy was analyzing the trajectory made after throwing a football. his coach was able to measure that his throw reached a maximum height of 18 feet after 2 seconds. he figured that the ball left his hand at a height of 5 feet. Let the independent variable represent time and the dependant variable represent height of the ball. Use this information to write an equation to model the path of the ball and predict when the ball will hit the ground the ball will hit the ground at approximately ________ seconds

Answers

Answer:

4.35 seconds.

Step-by-step explanation:

Let x represent the time the independent variable and y be dependent variable (height of the ball).

We are told that Duffy figured that the ball left his hand at a height of 5 feet. This means at x equals 0, y was 5 or initial height of ball is 5 feet.

We have been given that Duffy's coach measured that his throw reached a maximum height of 18 feet after 2 seconds. This means that at x equals 2 y was 18.

As point (2,18) represents maximum height of ball, so it will be vertex of parabola.

Since initial height of ball is less than maximum height, so our parabola will be downward opening and leading coefficient will be negative.

We know that vertex form of a downward opening parabola is in form: $y=-a(x-h)^2+k$

$y=-a(x-2)^2+18$

Let us find value of a using point (0,5).

$5=-a(0-2)^2+18$

$5=-a*4+18$

$5-18=-a*4+18-18$

$-13=-4a$

$(-13)/(-4)=(-4a)/(-4)$

$(13)/(4)=a$

Therefore, the equation $y=-((13)/(4))(x-2)^2+18$ can be used to find the height of ball after x seconds.

To find the time it will take the ball to hit the ground, we will substitute y equals 0 in our equation.

$0=-((13)/(4))(x-2)^2+18$

$0-18=-((13)/(4))(x-2)^2+18-18$

$0-18=-((13)/(4))(x-2)^2$

$-18*((4)/(13))=-(x-2)^2$

$(72)/(13)=(x-2)^2$

Taking square root of both sides of our equation we will get,

$\sqrt{(72)/(13)}=x-2$

$x-2\pm 2.35339$

$x-2=2.35339\text{ (or) } x-2=2.35339$

$x-2+2=2.35339+2\text{ (or) } x-2+2=-2.35339+2$

$x=4.35339\text{ (or) } x=-0.35339$

$x\approx 4.35\text{ (or) } x\approx -0.35$

Since time can not be negative, therefore, the ball will hit the ground approximately after 4.35 seconds.

On the blueprint of a house, 28 millimeters represents 6 meters. The actual length of the living room is 9 meters. What is its length on the blueprint?

Answers

The length on the blueprint is 42 mm.

What is Scale Factor?

Scale factor is a number by which the size of any geometrical figure or shape can be changed with respect to its original size. It is used to draw the enlarged or reduced shape of any given figure and to find the missing length, area, or volume of an enlarged or reduced figure. It should be noted that the scale factor helps in changing the size of the figure and not its shape.

We have,

On the blueprint of a house, 28 millimeters represents 6 meters.

The actual length of the living room is 9 meters.

Then, 6 meter represents

= 28/6

= 14/3

So, the length of living rooms

= 9 x 14/3

= 42 mm

Learn more about Scale Factor here:

brainly.com/question/30215119

#SPJ1

You could create a ratio.

final answer would be 42

Describe two methods for finding the sale price of an item that is discounted 30%. which method do you prefer? Explain.

Answers

Answer:

1. Find the value of the discount amount, and subtract from the original.

2. Find the value of the item after discount by using 100%-30%.

I prefer the second, as it is faster.

Step-by-step explanation:

1. Find the value of the discount amount, and subtract from the original.

Say y is the amount you pay after the discount, and x is the original price, the calculation will look like this:

The value of the discount is 30% of x, which is equal to 0.3x.

subtract that from the original value to find y:

y = x - 0.3x

2. Find the value of the item after discount by using 100%-30%.

The amount left over after subtraction thirty % is 70%

Thus,

y = 0.7 x

one can take the price of the item before the discount is applied and subtract that from the percentage off and get the cost of the item.

I find this is the most effective way.

another method could be if one turned the percentage into a decimal it could be subtracted from the cost of the item.

In a trivia game, each finalist must answer 4 questions correctly. Each question is worth twice as much as the question before it. The fourth question is worth $6,000. How much is the first question worth, in whole dollars?