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krok68 [10]
3 years ago
15

How can you use equations to solve problems involving area and volume?

Mathematics
1 answer:
antiseptic1488 [7]3 years ago
8 0

Answer:

Step-by-step explanation:

I think you're asking how we use formulas to find areas and volumes.

There's no one area formula; the formula we use to calculate an area depends upon the shape.

For example, the area of a square of side length s is A = s^2.

The area of a triangle with base b and height h is (1/2)*b*h.

Similarly, the choice of formula for the purpose of calculating voume depends upon the shape of the 3-dimensional object.

For example, the volume of a cube with side length s is V = s^3.

The volume of a cylinder with radius r and height h is V = (1/3)πr^2*h.

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Shoppers were surveyed about their spending for holiday shopping. The standard deviation of the amount shoppers
yawa3891 [41]

Answer:

The amount shoppers spent typically varies by about $125 from the mean.

Step-by-step explanation:

Thats the Answer on Edgeunity.

3 0
3 years ago
A scientist needs 60 liters of a 40% solution of alcohol. He has a 30% solution and a 60% solution available. How many liters of
Monica [59]

A scientist needs 60 liters of a 60% acid solution. He currently has a 40% solution and a 70% solution. How many liters of each does he need to make the needed 60 liters of 60% acid solution?

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

Equation:

acid + acid = acid

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

0.40x + 0.70(60-x) = 0.60*60

-----

40x + 70*60 - 70x = 60*60

 

-----

-30x = -10*60

x = 20 liters

----

Gabe needs 20 liters of the 40% solution.

He also needs 40 liters of the 70% solution.

6 0
3 years ago
Solve the following system of equations. Show all work and solutions.
Hitman42 [59]
  • y=2x²+6x+1
  • y=-4x²+1

Make the equations equal and solve for x

  • 2x²+6x+1=-4x²+1
  • 6x²+6x=0
  • 6x(x+1)=0
  • 6x=0 or x+1=0
  • x=0 or x=-1

For x=0

  • y=-4(0)+1=1

For x=-1

  • y=-4(1)+1=-3

The solutions are

  • (0,1) and (-1,-3)

Graph attached

4 0
2 years ago
How many yards will Ms. Angela need if she wants to make 10 of each type of mask if adding she has 2 1/2
Helga [31]

Answer:

Total = 25\ yd

Step-by-step explanation:

The given parameters can be represented as:

Length = 2\frac{1}{2}

Number=10

Required

The total yards

This is calculated as:

Total = Number * Length

Total = 10 * 2\frac{1}{2}\ yd

Convert fraction to decimal

Total = 10 * 2.5\ yd

Total = 25\ yd

3 0
3 years ago
Megan bought 3 tickets to the ballet for $57.50. how many would it cost for her to buy 15 tickets.​
Nutka1998 [239]

Answer: $287.50

Step-by-step explanation:

Find out how much each ticket costs: 57.50/3= 19.17

Multiply that by 15: 19.7x15=287.5

5 0
3 years ago
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