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3 years ago

6

A square has an area of 90 square inches. The formula for the area A of a square with side length L is A = L^2. Find the length

of one side of the square.

1 answer:

Dovator [93]3 years ago

6 0

Answer:

Step-by-step explanation:

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Write an equation of the line, in point-slope form, that passes through the points (–7, 2) and (3, –2). Use (–7, 2) as the point

Veronika [31]

Answer:

first use the equation m = y2 - y1 / x2- x1 to get the slope

m = -2 - 2 = -4

m = 3 + 7 = 10 when there is a negative for x1 it turns positive

the slope is -4/10 or -2/5

now plus the info into the point slope equation

y - y1 = m (x-x1)

this is in point slope form y - 2 = -2/5 (x + 7)

This is how to get it in y-intercept form

y -2 = -2/5x + -2.8

now add -2 on both sides to the -2.8

y = -2/5x (Slope) + -0.8 y- intercept

Hopefully this is right becuase this is just what i learned

Step-by-step explanation:

3 0

3 years ago

A map of a public park shows a circular pond. There is a bridge along a diameter of the pond that is 0.25 mi long. You walk acro

Valentin [98]

The distance further the friend walked is 0.41 miles.

<h3>How much farther did the friend walk?</h3>

The distance the friend walked can be determined by calculating the circumference of a semicircle.

Circumference of a semicircle = πr + 2r

r = 0.25 / 2 = 0.125mi

3.14 x 0.125 + 0.25 = 0.66 mi

Difference in the distance = 0.66 - 0.25 = 0.41 miles

To learn more about how to determine the circumference, please check: brainly.com/question/14351152

##SPJ1

7 0

2 years ago

Consider the following regression output where the dependent variable is testscores and the two explanatory variables are the st

jeyben [28]

Answer:

The correct option is (A).

Step-by-step explanation:

The multiple linear regression equation is given by, $y=\alpha +\beta _{1} x_{1}+\beta _{2}x_{2}$ , where <em>α</em> = constant and <em>β</em> $_{i}$ = slope coefficients of regression line.

To test if there is a important relationship amid <em>X</em> $_{i}$ and <em>Y</em>, we use the <em>t</em>-statistic test.

The <em>t</em>-statistic for regression coefficient analysis is given by,

$t=\frac{\beta_{i}}{S.E._{\beta_{i}}}$

The regression equation for test scores dependent upon the two explanatory variables, the student-teacher ratio and the percent of English learners is:

$\text{TestScore} = 698.9 - 1.10 \text{ STR} - 0.650 \text{ PctEL}$

A <em>t</em>-test for the significance of the regression coefficient of variable student-teacher ratio (STR) is conducted.

The test statistic is found to be, <em>t</em> = 2.56.

The regression coefficient of variable STR is, 1.10.

Compute the standard error of the regression coefficient as follows:

$t=\frac{\beta_{i}}{S.E._{\beta_{i}}}$

$S.E._{\beta_{i}}=\frac{\beta_{i}}{t}$

$=\frac{1.10}{2.56}\\\\=0.4296875\\\\\approx 0.43$

The standard error of the regression coefficient is 0.43.

Thus, the correct option is (A).

4 0

3 years ago

A steel ball is dropped from a building’s roof and passes a window, taking 0.125 s to fall from the top to the bottom of the win

Anna35 [415]

Answer:

20.425 m

Step-by-step explanation:

t = Time taken

u = Initial velocity

v = Final velocity

s = Displacement

a = Acceleration due to gravity = 9.81 m/s²

$s=ut+\frac{1}{2}at^2\\\Rightarrow u=\frac{s-\frac{1}{2}at^2}{t}\\\Rightarrow u=\frac{1.2-\frac{1}{2}\times 9.81\times 0.125^2}{0.125}\\\Rightarrow u=8.98\ m/s$

Now this will the final velocity when it reaches the top of the window

$v^2-u^2=2as\\\Rightarrow s=\frac{v^2-u^2}{2a}\\\Rightarrow s=\frac{8.98^2-0^2}{2\times 9.81}\\\Rightarrow s=4.11\ m$

$v=u+at\\\Rightarrow v=8.98+9.81\times 0.125\\\Rightarrow v=10.21\ m/s$

If the upward flight is an exact reverse of the downward flight then the time taken while going down will be 1 second and going up will be 1 second.

$s=ut+\frac{1}{2}at^2\\\Rightarrow s=10.21\times 1+\frac{1}{2}\times 9.81\times 1^2\\\Rightarrow s=15.115\ m$

Hence total height of the building is 4.11+1.2+15.115 = 20.425 m

4 0

3 years ago

Find the digits in the ones place, in the tenths place, and in the ten thousandths place for the following number.

Serjik [45]

Ones: 3
Tenths: 1
Ten thousandths:6

4 0

2 years ago