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tino4ka555 [31]
2 years ago
15

Do the ratios 4:5 and 13:20 form a proportion?

Mathematics
1 answer:
Montano1993 [528]2 years ago
4 0

Answer:

No

Step-by-step explanation:

Cross multiplying shows that the proportion is false.

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Simplify the algebraic expression: (Combine like terms)<br><br> 25 + 3x + 16y - 15 + x - 10y
Maslowich
10+4x+6y because 25-15 3+1 and 16-10
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3 years ago
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Solve <br><br> 0.6(10n + 25) = 10 + 5n ?
Pachacha [2.7K]

Answer: x=-5

<u>Simplify both sides of the equation</u>

(0.6)(10n)+(0.6)(25)=10+5n(Distribute)\\6n+15=10+5n\\6n+15=5n+10

<u>Subtract 5n from both sides</u>

6n+15-5n=5n+10-5n\\n+15=10

<u>Subtract 15 from both sides</u>

n+15-15=10-15\\n=-5

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3 years ago
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A cylinder has radius 2.5 cm and lateral area 20 pi cm^2. What is the surface area of the cylinder in terms of pi?
Novosadov [1.4K]
This is the concept of areas of solid materials; the surface area of the cylinder whose radius is 2.5 cm and lateral area is 20 pi cm^2 will be: Surface area of cylinder is given by:
SA=(area of cyclic sides)+(lateral area)
SA=2πr^2+πrl
Area of the cyclic sides will be:
Area=2πr^2
=2*π*2.5^2
=12.5π cm^2
The lateral area is given by:
Area=20π cm^2
Therefore the surface area of cylinder will be:
SA=(12.5π+20π) cm^2
SA=32.5π cm^2
The answer is 32.5π cm^2

4 0
3 years ago
There are 12 cars contesting a race. The first three cars completing the race will be awarded prizes. In how many ways can the p
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There would be 1,320 different ways, just multiply all the possible front runners 12 second runners 11 and third runners 10, 12x11x10=1,320
5 0
3 years ago
9 / 3/4 into a improper fraction
sleet_krkn [62]

Answer:

39/4

Step-by-step explanation:

Step 1 - Setup

First, we set up the mixed number 9 3/4 with different colors, so it is easy to follow along:

9

   3  

   4  

Step 2 - Multiply

Next, we multiply the whole number by the denominator.

9 x 4 = 36

Step 3 - Add Numerator

Then, we add the numerator to the answer we got in Step 2.

36 + 3 = 39

Step 4 - Solution

Finally, to get the solution, we keep the original denominator and make the numerator the answer from Step 3. Thus, 9 3/4 as an improper fraction is:

   39  

   4  

5 0
3 years ago
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