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3 years ago

HELP!!!

Mathematics

1 answer:

lesya [120]3 years ago

6 0

Answer:

its D

Step-by-step explanation:

basically all you have to do if cut off the semicircles fins their areas then find the rectangles area and add them all up

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The shade of marble tile is measured by the amount of light reflected by the tile measured on a scale of 0-255. A perfectly blac

Dafna11 [192]

Answer:

Step-by-step explanation:

Sample data

204.999 206.149 202.102 207.048 203.496 206.343 203.496 206.676 205.831

N=9

Sum, Σx: 1846.14

Mean, μ: 205.12666666667

Variance, s^2: 2.6217475555555

Std dev = s = 1.619

The sample mean follows a t distribtion with df =8

Mean difference = 205.13-204.8 = 0.50

Std error = std dev/sqrt n = 0.540

Test statistic = Mean diff/se = 0.9259

p value = 0.1907 (one tailed at 95%)

Since p >0.05 we accept null hypothesis.

We cannot conclude that the mean shade of Mezza Perla tile (µ) is greater than 204.8

7 0

3 years ago

I attached a problem i have to write the equation in standard form using integers

maksim [4K]

9514 1404 393

Answer:

7x +9y = -1

Step-by-step explanation:

The standard form of the equation for a line is ...

ax +by = c

where a, b, c are mutually prime integers and a > 0.

We can get this form by multiplying the equation by 9, adding 7x+27.

y - 3 = -7/9(x +4)

9y -27 = -7x -28 . . . . . multiply by 9, eliminate parentheses

7x +9y = -1 . . . . . . . . . add 7x+27 to both sides

_____

The attached graph shows both equations. They are in different colors and textures so you can see they are the same line.

6 0

3 years ago

Suppose in Loma, Montana the temperature rose from -2.3 degrees Fahrenheit to 8.6 degrees Fahrenheit. What is the change in temp

adelina 88 [10]

Answer:

A: 10.9

Step-by-step explanation: -2.3 is 2.3 away from zero then add the length from zero to the postive number which in this case is 8.6, therefore the equation is 2.3 + 8.6 = 10.9

6 0

3 years ago

Describe how the graph of y= x2 can be transformed to the graph of the given equation. y = x2 + 8

ANEK [815]

When you add 8 to the end of a function formula, the graph moves UP 8 units. This is often called either a translation or vertical shift.

3 0

3 years ago

The equation of a circle is x2+y2−12x+6y+20=0 .

Rufina [12.5K]

Answer:

The radius is r=5 units

Step-by-step explanation:

we know that

The equation of the circle in standard form is equal to

$(x-h)^{2}+(y-k)^{2}=r^{2}$

where

(h,k) is the center and r is the radius

we have

$x^{2}+y^{2}-12x+6y+20=0$

Convert to standard form

Group terms that contain the same variable, and move the constant to the opposite side of the equation

$(x^{2}-12x)+(y^{2}+6y)=-20$

Complete the square twice. Remember to balance the equation by adding the same constants to each side

$(x^{2}-12x+36)+(y^{2}+6y+9)=-20+36+9$

$(x^{2}-12x+36)+(y^{2}+6y+9)=25$

Rewrite as perfect squares

$(x-6)^{2}+(y+3)^{2}=5^{2}$

therefore

The center is the point (6,-3) and the radius is r=5 units

8 0

3 years ago