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s344n2d4d5 [400]
3 years ago
8

I need help with this part, someone help me out :)

Mathematics
1 answer:
Alexandra [31]3 years ago
4 0

Answer:

A & B

Step-by-step explanation:

A) V = pi×r²×h

= 3.142 × 8² × 5 = 1005.44 cm³

B) V = ⅓ × 18×16 × 12 = 1152 cm³

C) V = ½×5×3 × 7 = 52.5 cm³

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The blades of a windmill turn on an axis that is 35 feet above the ground. the blades are 10 feet long and complete two rotation
ValentinkaMS [17]

Answer:

it is c

Step-by-step explanation:

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8 0
2 years ago
What equation would go through (-9,-9) and (-6,0)
Scilla [17]

Answer:

The equation of line is y = 3 x +18

Step-by-step explanation:

Given as :

The points are

(x_1, y_1) = (- 9, -9)

(x_2, y_2) = (- 6 , 0)

Let The slope = m

Now,<u> The slope is calculated in points form</u>

So, Slope = \dfrac{y_2-y_1}{x_2-x_1}

I.e m = \dfrac{y_2-y_1}{x_2-x_1}

or, m = \dfrac{0 - (-9)}{- 6 - (-9)}

or, m = \dfrac{9 }{3}

I.e m = 3

So, The slope of points = m = 3

<u>Now, the equation of line in slope - point form can be written as</u>

y - y_1 = m ( x - x_1 )

where m is the slope of line

i.e y - (-9) = ( 3 ) × ( x - (-9) )

or, y + 9 =  3 × (x + 9)

∴ y + 9 = 3 x + 27

Or, y = 3 x + 27 - 9

O,r y = 3 x + 18

So, The equation of line is y = 3 x + 18

Hence, The equation of line is y = 3 x +18 . Answer

7 0
3 years ago
The meaning of logarithm
gogolik [260]

Answer:

the meaning of logarithm is a quantity representing the power to which a fixed number (the base) must be raised to produce a given number.

Step-by-step explanation:

: )

8 0
3 years ago
Simplify and expand the equation below <br>7(2-x)-(x-3)​
Tanya [424]

Answer:

- 8x + 17

Step-by-step explanation:

7(2 - x) - (x - 3)​

14 - 7x - x + 3

- 8x + 14 + 3

- 8x + 17

3 0
3 years ago
Pleaseeee help ty!<br><br><br><br><br><br> :)
Gre4nikov [31]

Problem 3

<h3>Answer:  1/5 of a gallon per minute</h3>

-------------------------

Explanation:

Two points from the graph are (10,2) and (20,4)

Apply the slope formula

m = (y2-y1)/(x2-x1)

m = (4-2)/(20-10)

m = 2/10

m = 1/5

The slope of the graph is 1/5.

Do the same for two points from the table. I'll use the first two rows

m = (y2-y1)/(x2-x1)

m = (4-2)/(10-5)

m = 2/5

The slope of the table is 2/5.

Subtract the two slopes to wrap things up:

2/5 - 1/5 = (2-1)/5 = 1/5

=====================================================

Problem 5

<h3>Answer:  23 degrees</h3>

------------------------

Explanation:

Angles 1 and 3 are same side exterior angles, so they are supplementary due to the parallel lines set up here.

(angle1)+(angle3) = 180

(157) + (angle3) = 180

angle3 = 180-157

angle3 = 23 degrees

4 0
3 years ago
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