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Sladkaya [172]
3 years ago
7

How many cans of paint are needed to cover an area of 2200 square units if one can of paint covers in area 400 square units

Mathematics
1 answer:
sergij07 [2.7K]3 years ago
5 0

Answer:

6

Step-by-step explanation:

You have a total area of 2,200 sq units to cover... and each can of paint covers 400 sq units.  So, you'll need:

2200 sq units / 400 sq units/can = 5.5 cans

In such problems, we always round up, since you will need 5 full cans of paint, and half of a 6th can.

So, in total you will need 6 cans of paint to cover all 2,200 sq units.

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kozerog [31]
F>3
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6 0
2 years ago
What are the solution(s) to the quadratic equation 40 − x2 = 0? x = ±2 x = ±4 x = ±2 x = ±4
hichkok12 [17]

Answer: x=\±2\sqrt{10}

Step-by-step explanation:

To find the solutions of the quadratic equation given in the problem, you can apply the proccedure shown below:

- Subtract 40 from both sides of the equation.

- Multiply both sides of the equation by -1

- Apply square root to both sides of the equation.

Therefore, by applyin the steps above, you obtain:

40-x^2-40=0-40\\-x^2=-40\\(-1)(-x^2)=(-40)(-1)\\\\x^2=40\\\\\sqrt{x^2}=\±\sqrt{40}\\\\x=\±2\sqrt{10}

3 0
3 years ago
Read 2 more answers
Help me please I need help​
adoni [48]
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8 0
3 years ago
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How can 1/5x-2=1/3x+8 be set up as a system of equation
erik [133]
Hello :
<span>1/5x-2=1/3x+8
let ; y = </span><span>1/5x-2 ..... (1)
       y=1/3x+8  .....(2)
by (1) : 1/5 x =y+2
             x = 5y +10....(*)
by (2) : 1/3x = y-8
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(**) : 3y-x =24     ......( last answer )


</span>
4 0
3 years ago
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ludmilkaskok [199]

Answer:

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Step-by-step explanation:

note that (p - q)(x) = p(x) - q(x), thus

p(x) - q(x)

= x² - 1 - 5(x - 1) ← distribute parenthesis by - 5

= x² - 1 - 5x + 5 ← collect like terms

= x² - 5x + 4

8 0
3 years ago
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