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2 years ago

What is the area of a circle with diameter of 6x? (Use 3.14 for .).

Mathematics

2 answers:

ser-zykov [4K]2 years ago

6 0

Answer:The answer would be D) 28.26

Step-by-step explanation:

bogdanovich [222]2 years ago

4 0

Answer:

D.) 28.26x²

Step-by-step explanation:

Diameter (d) = 6x

radius (r) = d/ 2 = 6x / 2 = 3x

area of circle

= π r²

= 3.14 * (3x) ²

= 28.26x²

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Donata bought 4 lemons and 4 plums at the local supermarket for a total of $ 21.60. Dan bought 11 lemons and 6 plums at the same

VashaNatasha [74]

you must establish a equation system with the information given , 4x numbers of limon , where x represent the cost of every lemon and 4y numbers of plums , where y represents the cost of plums
now the equation system is 1) 4x+ 4y = 21,60 and 2) 11x+ 6y = 40.29
of the equation 1 you must obtain the value of x, 4x = 21.60+4y ⇒x=21.60/4+4y/4⇒x= 5.4+y
now with the value of x , it is substitute in the equation 2) 11(5.4+y) + 6y = 40.29 , ⇒ 59.4 + 11y + 6y = 40.29 ⇒ 17y = 40.29-59.4⇒ y = -19,11/7⇒ y = -2.73
the value of y is substitute in the equation 1) x = 5.4 + ( -2,73)⇒ x= 2,67, where ,the price of every lemon is $ 2,67

6 0

2 years ago

How many quarts of pure antifreeze must be added to 8 quarts of a 40% antifreeze solution to obtain a 60% antifreeze solution

anyanavicka [17]

Let q be the number of quarts of pure antifreeze that needs to be added to get the desired solution.

8 quarts of 40% solution contains 0.40 × 8 = 3.2 quarts of antifreeze.

The new solution would have a total volume of 8 + q quarts, and it would contain a total amount of 3.2 + q quarts of antifreeze. You want to end up with a concentration of 60% antifreeze, which means

(3.2 + q) / (8 + q) = 0.60

Solve for q :

3.2 + q = 0.60 (8 + q)

3.2 + q = 4.8 + 0.6q

0.4q = 1.6

q = 4

4 0

1 year ago

Sharon drops a rubber ball from a height of 48 feet. Every bounce sends the ball half as high as it was before.What is the total

Viefleur [7K]

First hit it travels 48 ft
Second hit it travels 24 + 24 ft
third hit 12 + 12
4th hit 6 + 6 ft

Total = 48 + 48 + 24 + 12 = 132 ft Answer

8 0

2 years ago

12. The $60 selling price of a camera is the cost increased by twice the cost. Find the cost.

prisoha [69]

Answer: Assuming you mean that the original cost was doubled and now equals $60, the camera costed $30. Assuming the camera's price has been doubled from $60, it is $120. The wording is a bit unclear, so I'm giving you both answers.

Step-by-step explanation: To find half of the price of $60, simply divide it by 2, which gives you $30.

3 0

2 years ago

Someone please explain how this make sense

Andru [333]

Answer:

6x + 12y = 816

Step-by-step explanation:

6 dollars per regular admission

12 dollars per both dance and volleyball

in total 816 dollars

3 0

1 year ago