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Alenkasestr [34]
3 years ago
13

Write a real-world problem involving a percent that can be solved by using the proportion 3/b= 60/100. Then solve the proportion

.
Mathematics
1 answer:
inessss [21]3 years ago
8 0
Dax goes to the store to buy milk. There is a sale for milk, and it now costs 3 dollars since it was 60% off. What was the original price of the milk?
3 - 60
x - 100
Cross multiply
300=60x
5=x

The milk original cost 5 dollars.
You might be interested in
Ten times an integer is added to seven times it’s square. If the result is 152, what was the original number?
Bess [88]

Answer:

Required number is 4.

Step-by-step explanation:

Let the required number be a.

Given,

Sum of ten times the integer and seven times it’s square is 152.

= > Ten times of a + seven times of it's square = 152

= > 10( a ) + 7( a )^2 = 152

= > 10a + 7a^2 - 152 = 0

= > 7a^2 + 10a - 152 = 0

= > 7a^2 + ( 38 - 28 )a - 152 = 0

= > 7a^2 + 38a - 28a - 152 = 0

= > a( 7a + 38 ) - 4( 7a + 38 ) = 0

= > ( a - 4 )( 7a + 38 ) = 0

= > a = 4 or - 38 / 7

Hence the required number is 4.

3 0
2 years ago
Which number is irrational
alina1380 [7]

For this case, we have by definition, that an irrational number is a number that can not be expressed as a fraction \frac {a} {b}, where a and b are integers and b is nonzero.

Some examples are:

\sqrt {2}, \sqrt {3}, e, \pi.

So, that the answer is \pi.

Answer:

Option C

4 0
3 years ago
12-15÷ 3-3 somebody help me plsss!!
Shtirlitz [24]

Hello.

The answer is: 4

12-(15/3)-3 = 0

(1/4)*(x-8) = 2

(3*b)/5 = -2

3;4;-5;6

1;4;2;3

Have a nice day

5 0
3 years ago
Solve the simultaneous equations: <br> <img src="https://tex.z-dn.net/?f=y%20%3D%20%20x%5E%7B2%7D%20-%203x%20-%203%20" id="TexFo
Paraphin [41]
I hope this helps you

8 0
3 years ago
In "Pokemon Go", pokeballs cost $0.99 per 100 poke balls and great balls cost $0.99 per
Katarina [22]

Answer:

150 greatballs 200 pokeballs. Ratio is 4:3

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
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