All categories

2 years ago

I am doing do math homework 8-10 can someone plzzz help me

Mathematics

1 answer:

zubka84 [21]2 years ago

8 0

Answer:

I could help you, what are the questions you need help with? x

Step-by-step explanation:

-Emilie Xo

You might be interested in

14 + 3х - 5 + 4х how do I solve

Varvara68 [4.7K]

Answer:

9 + 7x

Step-by-step explanation:

14 + 3х - 5 + 4х

Subtract the numbers, and add the x's together.

9 + 7x

This is the furthest the expression can be simplified.

Hope this helps :)

7 0

2 years ago

Read 2 more answers

Hayley so 20 tickets to the school play for total of $225. Early bird tickets were $10 regular priced tickets are $15. Wright an

alexandr402 [8]

System of Equations

For the problem to solve we'll use the following variables:

x = number of the early bird tickets sold

y = number of the regular tickets sold

Haley sold a total of 20 tickets, thus:

x + y = 20 [1]

Early bird tickets cost $10 and regular tickets cost $15, thus the total money collected is:

10x + 15y = 225

Dividing by 5:

2x + 3y = 45 [2]

We have to solve the system of equations [1] and [2].

Multiply [1] by -2:

-2x - 2y = -40 [3]

Add [3] to [2]:

-2x - 2y +2x + 3y = -40 + 45

Simplifying:

y = 5

Substituting in [1]:

x + 5 = 20

Subtracting 5:

x = 20 - 5

x = 15

Solution: Hayley sold 15 early bird tickets and 5 regular-priced tickets

The order pair solution is (15,5)

5 0

1 year ago

Determine if the sequence below is arithmetic or geometric and determine the common difference / ratio in simplest form. 11, 7,

lara31 [8.8K]

the sequence is arithmetic because it's incrementing by a constant ratio of -4

4 0

2 years ago

Read 2 more answers

Assume that you have paired values consisting of heights (in inches) and weights (in lb) from 40 randomly selected men. The li

HACTEHA [7]

Answer:

$R^2 = r^2 = 0.445^2= 0.198$

B. The coefficient of determination is 0.1980, 19.8% of the variation is explained by the linear correlation, and 80.2% is explained by other factors.

Step-by-step explanation:

Previous concepts

The correlation coefficient is a "statistical measure that calculates the strength of the relationship between the relative movements of two variables". It's denoted by r and its always between -1 and 1.

Solution to the problem

In order to calculate the correlation coefficient we can use this formula:

$r=\frac{n(\sum xy)-(\sum x)(\sum y)}{\sqrt{[n\sum x^2 -(\sum x)^2][n\sum y^2 -(\sum y)^2]}}$

On this case we got that r =0.445

The determinaton coefficient is just:

$R^2 = r^2 = 0.445^2= 0.198$

And we can put it on % and we got 19.8%. And represent the variation explained by a linear model. The best option on this case would be:

B. The coefficient of determination is 0.1980, 19.8% of the variation is explained by the linear correlation, and 80.2% is explained by other factors.

Since the explained variation is 19.8% and the remain 100-19.8= 80.2% is explained by other factors.

6 0

2 years ago

Four students are playing a math game at home. One of the math

BigorU [14]

Kayla wrote an equation.
William wrote an inequality.
They both have solutions.
Kayla's solution is x=4 .
William's solution is x > -2.5 .

Brandon and Alice wrote expressions.
Those are just numbers, that depend on the value of 'x'.

7 0

2 years ago

Read 2 more answers