A square has a perimeter of 28 feet.
What is its area?

Answers

Answer 1

Answer: Since the formula for the perimeter of a square is 4s then
4s=28
s=7

Now the area of square is s^2=a
(7)^2=a
49=a

Answer 2

Answer:

Answer: 49 feet squared

A square has four equal sides. It the perimeter is 28, then each side is 7 feet. The area is just the side length squared. 7 times 7 equals 49

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Needs more points....not done with this one

Answers

Coordinates of point C (2,-1). Explanation is in the attachment.

Hi please help with a few (mean, median) math questions!1. A student wants to report on the number of movies her friends watch each week. The collected data are below:

1ST PIC ATTACHMENT

Which measure of center is most appropriate for this situation and what is its value?
Median; 1.5
Median; 3
Mean; 1.5
Mean; 3

2. If the outliers are not included, what is the mean of the data set?

76, 79, 80, 82, 50, 78, 83, 79, 81, 82

77
78
79
80

3. Given the box plot, will the mean or the median provide a better description of the center?

2ND PIC ATTACHEMENT

The mean, because the data distribution is symmetrical
The mean, because the data distribution is skewed to the left
The median, because the data distribution is skewed to the left
The median, because the data distribution is skewed to the right

4. When the outliers are removed, how does the mean change?

3RD PIC ATTACHEMENT

The mean remains the same.
The mean decreases by 2.
The mean increases by 2.
There are no outliers.

Answers

1.rearrange your data from least to greatest:
0,0,1,1,2,2,2,14

middle is 1 and 2 ... so median is 1+2/2= 1.5 and it is the median not the mean
2.I believe the only outlier is 50. Finding the mean would be 80.11.
The answer would be D
3.D. Mean always goes toward the skewness due to outliers.
Median is minimally affected by outliers.
4.We remove an outlier because we can simply assume that there was some type of extreme experimental error, or something went wrong. The mean shouldn't be effected that much, but the median will be greatly effected.

The formula for height, in feet of a projectile under the influence of gravity is given by h=-16t^2+vt+s, where t is the time in seconds, v is the upward velocity at the start, and s is the starting height. Marvin throws a baseball straight up into the air at 70 feet per second. The ball leaves his hand at a height of 5 feet. When does the ball reach a height of 75 feet?

Answers

Answer:

1.55s

Step-by-step explanation:

The height equation of the projectile is given as;

h = -16t^2 + vt + s .......1

where;

t is the time in seconds,

v is the upward velocity at the start,

s is the starting height.

Given;

v = 70 ft/s

s = 5 ft

Substituting the values equation 1 becomes;

h = -16t^2 + 70t + 5

For the ball to reach 75 ft, h = 0

75 = -16t^2 + 70t + 5

-16t^2 + 70t + 5 - 75 = 0

-16t^2 + 70t - 70 = 0

solving the quadratic equation;

Time t = 2.83 s and t = 1.55s

Therefore, the ball will first reach 75 ft after 1.55 seconds.

Shirabi spent $208 on a sewing machine to make purses. She spends a total of $10 on thread, fabric, and accessories for each purse and plans to charge $36 for each purse. The equation represents her break-even point, when x represents the number of purses sold.208 + 10x = 36x

How many purses must she sell in order to break even?

Answers

Answer:

Step-by-step explanation:

You want to isolate x so that you can solve for it based on the value you have.

This gives you 26x=208. 208/26 equals 8

Answer:

D) 8

Step-by-step explanation:

edge2020

Write this equation: 8.75×10−4 in standard notation

Answers

To write in standard notation means writing the equation "normally", solving it and then writing the resulting number in its extensive form with all explicit digits. 10^-4 is 0,0001, so: 8,75x0,0001=0,000875

Which inequality has no solution?6(x+2)> x-3

3+4x<2(1+2x)

-2(x+6)< x-20

x-9 < 3 (x-3)

Answers

we will proceed to solve all cases to determine the solution of the problem

case A) $6(x+2)> x-3$

Eliminate the parenthesis of the left side

$6x+12> x-3$

Group terms that contain the same variable, and move the constants to the opposite side of the inequality

$6x-x> -3-12$

Combine like terms

$5x> -15$

$x> -3$

The solution is the interval--------> (-3,∞)

All real numbers greater than $-3$

therefore

The inequality A has solution

case B) $3+4x <2(1+2x)$

Eliminate the parenthesis of the right side

$3+4x <2+4x$

Group terms that contain the same variable, and move the constants to the opposite side of the inequality

$4x-4x <2-3$

Combine like terms

$0 <-1$ ---------> is not true

therefore

The inequality B has no solution

case C) $-2(x+6)< x-20$

Eliminate the parenthesis of the left side

$-2x-12< x-20$

Group terms that contain the same variable, and move the constants to the opposite side of the inequality

$-2x-x< -20+12$

Combine like terms

$-3x< -8$

Multiply by $-1$ both sides

$3x> 8$

$x> (8/3)$

The solution is the interval--------> (8/3,∞)

All real numbers greater than $8/3$

therefore

The inequality C has solution

case D) $x-9<3(x-3)$

Eliminate the parenthesis of the right side

$x-9<3x-9$

Group terms that contain the same variable, and move the constants to the opposite side of the inequality

$x-3x< -9+9$

Combine like terms

$-2x< 0$

Multiply by $-1$ both sides

$2x> 0$

$x>0$

The solution is the interval--------> (0,∞)

All real numbers greater than $0$

therefore

The inequality D has solution

therefore

the answer is

$3+4x <2(1+2x)$

$\boxed{3 + 4x < 2\left( {1 + 2x} \right)}$ inequality has no solution. Option (b) is correct.

Further explanation:

The linear equation with slope m and intercept c is given as follows.

$\boxed{y = mx + c}$

The formula for slope of line with points $\left( {{x_1},{y_1}} \right)$ and $\left( {{x_2},{y_2}} \right)$ can be expressed as,

$\boxed{m = \frac{{{y_2} - {y_1}}}{{{x_2} - {x_1}}}}$

Given:

The inequalities are as follows,

(a). $6\left( {x + 2} \right) > x - 3$

(b). $3 + 4x < 2\left( {1 + 2x} \right)$

(c). $- 2\left( {x + 6} \right) < x - 20$

(d). $x - 9 < 3\left( {x - 3} \right)$

Explanation:

Solve the inequality $6\left( {x + 2} \right) > x - 3$ to check whether the inequality has solution.

$\begin{aligned}6\left( {x + 2} \right) >& x - 3\n6x + 12 >& x - 3\n6x - x >& - 3 - 12\n 5x >&- 15\nx >& \frac{{ - 15}}{5}\nx >&- 3\n\end{aligned}$

Option (a) has solution.

Solve the inequality $3 + 4x < 2\left( {1 + 2x} \right)$ to check whether the inequality has solution.

$\begin{aligned}3+ 4x &< 2\left( {1 + 2x} \right)\n3 + 4x &< 2 + 4x\n3&< 2\n\end{aligned}$

Option (b) has no solution.

Solve the inequality $- 2\left( {x + 6} \right) < x - 20$ to check whether the inequality has solution.

$\begin{aligned}- 2\left( {x + 6}\right) &< x - 20\n- 2x - 12 &< x - 20\n- 12 + 20 &< x + 2x\n8&< 3x\n(8)/(3) &< x\n\end{aligned}$

Option (c) has solution.

Solve the inequality $x - 9 < 3\left( {x - 3} \right)$ to check whether the inequality has solution.

$\begin{aligned}x - 9&< 3\left( {x - 3} \right)\nx - 9&< 3x - 9\nx&< 3x \n1&< 3\n\end{aligned}$

Option (d) has solution.

$\boxed{3 + 4x < 2\left( {1 + 2x} \right)}$ inequality has no solution. Option (b) is correct.

Learn more:

Learn more about inverse of the functionbrainly.com/question/1632445.
Learn more about equation of circle brainly.com/question/1506955.
Learn more about range and domain of the function brainly.com/question/3412497

Answer details:

Grade: High School

Subject: Mathematics

Chapter: Linear equation

Keywords: numbers,slope, slope intercept, inequality, equation, linear inequality, shaded region, y-intercept, graph, representation, origin.

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A square has a perimeter of 28 feet. What is its area?

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A square has a perimeter of 28 feet.
What is its area?