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irinina [24]
3 years ago
13

What is the solution to this equation?

Mathematics
1 answer:
Viktor [21]3 years ago
5 0
The answers to that is x=50
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12 is 30% of ____ <br> (Please explain)
natka813 [3]

Answer:

40

Step-by-step explanation:

In word problems, the word "of" usually means multiply.  Thus, for example, 10% of $50 is $5.  This is because we can write 10% as 0.10 or as 10/100 (which is 1/10) and then multiply:    (1/10)(50) = 5

So, we often see equations like:

    R = (1/2)D        meaning R is 50% of D, or R is half of D

Let x = the number we want to find

This problem says:

 "12 is 30%       of    what number?"

  12 = (30/100) *        x

12 = (3/10)x

(10/3)12 = x             [multiply both sides by (10/3)]

    40 = x        

Checking (very important):      

 Is   12 = (3/10)(40)    ?

       12 = (3)(4)    ?

       12 = 12     ? yes

7 0
2 years ago
Read 2 more answers
A game store charges a monthly membership fee of $7.50, but then the charge to rent a game is only $1.00. Another store has no m
Eduardwww [97]

Answer:

6 games.

Step-by-step explanation:

Given that,

Monthly membership fee of store 1 is $7.5, but then the charge to rent a game is only $1.00

Another store has no membership fee, but that store charges $2.00 to rent a game.

Let there be n games needed to be rented each month for the total fees to be the same from either store.

Cost of first store = $7.50+$1.00n

Cost of another store = $2.00

If cost equals,

$7.50+$1.00n=$2

n=5.5 \approx 6

Hence, 6 games needed to be rented each month.

6 0
3 years ago
Determine if the two figures are congruent and explain your answer.
Alexus [3.1K]

Answer:

They can be congurent depending on which two figures you are using

Step-by-step explanation:

3 0
3 years ago
What is 3.5% as a fraction and decimal.
Stels [109]

Answer:

1. 3.5% is 35/1000 as a fraction and 0.035 as a decimal.

2. 2.31 is 231% and 231/100

3. 23/25 is 92% and 0.92

4. 33% is 33/100 and 0.33

Step-by-step explanation:

For converting from fraction to decimal, simply divide the top by the bottom.

For converting from decimal to fraction, depending on how many places there are, you choose what to divide by.  Ex: .002 (there are 3 places, it is divided by 1,000)

For fraction to percent, you divide the top by the bottom, make it a decimal, and move the decimal over two places to the right.

4 0
4 years ago
Read 2 more answers
Sally bought a sprinkler that squirts in a circular direction. With the center of the sprinkler as the center, it sends out wate
Verizon [17]

Answer:

37% of the backyard will not be covered by the water from the sprinkler.

Step-by-step explanation:

The sprinkler is at the centre (0,0). It squirts in a circular motion. The other end of the radius is at (12,16).

First we will calculate the radius of the circle.

r = \sqrt{(12-0)^2 + (16-0)^2}\\r = \sqrt{144 + 256}\\r = \sqrt{400}\\r = 20

Area of the circle = πr^2

= 3.1416*(20)^2

= 3.1416*400

= 1256.64

Area of yard = 40 ft * 50 ft

= 2000

Percent covered by the water = 100*(area of circle/area of yard)

= 100*(1256.64/2000)

= 100*(0.628)

= 62.8%

= 63%

Area not covered by the water = 100 - 63

= 37%

4 0
3 years ago
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