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3 years ago

A cylindrical barrel has a diameter of 18

Mathematics

2 answers:

nlexa [21]3 years ago

8 0

Answer:

C. 5 ft

Step-by-step explanation:

The diameter is 18 inches. Lets change that to feet

1 ft = 12 inches

18 inches * 1 ft/12 inches = 1.5 ft

The circumference is given by

C = pi *d

C = 3.14 * 1.5

C =4.71 ft

ivann1987 [24]3 years ago

8 0

Answer:

C. 5 ft

Step-by-step explanation:

Radius = 18/2 = 9 in ÷ 12 = 0.75 ft

Circumference = 2 × 3.14 × 0.75

= 4.71 ft

From the options, 5 ft is the closest

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Sedaia [141]

Answer:

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Step-by-step explanation:

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4 years ago

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Mamont248 [21]

Answer:

Step-by-step explanation:

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What is the slope of the line represented by the equation y = 4/5x – 3?

IRISSAK [1]

Slope is 4/5

The equation is Y = mx + b
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3 years ago

Please help me with 1,2,3,4 and show me how you get it the answers

Dafna11 [192]

Answer:

Step-by-step explanation:

Use the formula of distance between the two points $(x_1,y_1)$ and $(x_2,y_2)$ ,

Distance = $\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}$

1. Distance between A(3, 4) and B(8, 12),

AB = $\sqrt{(8-3)^2+(12-4)^2}$

AB = $\sqrt{25+64}$

= $\sqrt{89}$

≈ 9.43

2. Distance between C(-2, 10) and D(3, -2),

CD = $\sqrt{(3+2)^2+(-2-10)^2}$

= $\sqrt{25+144}$

= $\sqrt{169}$

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3. Distance between X(20, 4) and Y(17, 0),

XY = $\sqrt{(20-17)^2+(4-0)^2}$

= $\sqrt{3^2+4^2}$

= $\sqrt{25}$

= 5.00

4. Distance between E(2, -1) and M(6, 9),

EM = $\sqrt{(2-6)^2+(-1-9)^2}$

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3 years ago

How do I find the y coordinates of the vertex of a parabola?

Bess [88]

Answer:

My example:

1. Get the equation in the form y = ax4 + bx + c

2. Calculate -b / 4a. This is the x coordinate of the vertex

3. To find the y coordinate of the vertex, simply plug the value -b / 4a into the equation for x and solve for y.

Step-by-step explanation:

y=2x^2 -16x +30

vertex: ( 4, -2)

Focus: (4, -15/8)

Axis of symmetry: x = 4

Directrix: y = -17/8

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3 years ago