1. An airplane took off and reached an altitude of

You randomly select 2 marbles from a mug containing 5 blue marbles, 4 red marbles, and 3 white marbles. How many times greater i

qwelly [4]

Answer:

2/17

Step-by-step explanation:

Add all the marbles and add the 2 in front because 2 is what you are taking, and 17 is the total of marbles.

5 0

3 years ago

A concrete pillar has the shape of a cylinder. It has a diameter of 8 meters and a height of 9 meters. If concrete costs $87 per

Komok [63]

Answer:

Cost, C = $28410.72

Step-by-step explanation:

We have, a concrete pillar has the shape of a cylinder.

Diameter of pillar is 8 m and ts height is 9 m

If concrete costs $87 per cubic meter, it is required to find the concrete cost for the pillar. For this lets find the area of cylindrical shape. So,

$A=2\pi rh+2\pi r^2\\\\A=2\times 3.14\times 4\times 9+2\times 3.14\times 4^2\\\\A=326.56\ m^2$

The cost of pillar at the rate of $87 per cubic meter will be :

$C=326.56\times 87\\\\C=\$28410.72$

8 0

3 years ago

Simplify the expression: 2(x+h)^2 - 2x^2 over (x+h) - x

Karolina [17]

Answer:

4x

Step-by-step explanation:

4 0

3 years ago

X2 + y2 − 4x + 12y − 20 = 0

balu736 [363]

Answer:

kKKjKKIjJJIIIiIIIIIiI

Step-by-step explanation:

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5 0

3 years ago

Your tea her will grade your response 4-8 to ensure you receive proper credit

svlad2 [7]

Answer:

k = 73

Step-by-step explanation:

The sum of all the angles in a triangle is 180 degrees.

62 ° + k + 45 ° = 180

Solve the equation for k

Add 62 ° and 45 °

k + 107 = 180

Move all terms not containing C to the right side of the equation.

Subtract 107 from both sides of the equation.

k = 180 − 107

Subtract

k = 73

4 0

3 years ago