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hoa [83]
2 years ago
12

If the first number is increased by 30% and the second number by 80%, the sum will be 1.6 times larger than the initial sum. Fin

d the ratio of the first number to the second number.
Mathematics
1 answer:
Bezzdna [24]2 years ago
4 0

Answer:

2 : 3

Step-by-step explanation:

Let x represent the first number and let y represent the second number.

Therefore the initial sum of the numbers = x + y

Given that the first number is increased by 30%, it becomes = x + 30% of x = x + 0.3x = 1.3x.

Also, the second number is increased by 80%, it becomes = y + 80% of y = y + 0.8y = 1.8y.

The sum of this increased numbers is 1.6 times larger than the initial sum. That is:

1.3x + 1.8y = 1.6(x + y)

1.3x + 1.8y = 1.6x + 1.6y

1.8y - 1.6y = 1.6x - 1.3x

0.2y = 0.3x

The ratio of the first number to the second number (that is x / y) is:

0.3x = 0.2y

Divide through by 0.3y:

0.3x / 0.3y = 0.2y / 0.3y

x / y = 0.2 / 0.3

x / y = 2 / 3

x : y = 2 : 3

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What is the distance between points A and B? (Use only digits 0-9 to write the distance.)
qwelly [4]

Answer:

8

Step-by-step explanation:

A is on the negative side so you count the distanse as -6 -5 -4 so on and then you get to 0 and then its 12345678

3 0
2 years ago
The length of the
Trava [24]
I would estimate around 6 because say it was 6.5 and 3 then it would around the square root of like 31 and that is rounding down a lot so we would bump it up to somewhenre around 35 so the side would be around 5.8-6
4 0
3 years ago
When 5655 is divided by a positive two digit intreger "N" the remainder is 11, when 5879 is divided by the same intreger N the r
Temka [501]

Answer:

8

Step-by-step explanation:

Hi,

When we divide 5655 by N, we get remainder of 11, which means that 5655-11 is a multiple of N.

5655 - 11 = 5644 is a multiple of N.

Similarly, 5879-14 should be a multiple of N.

5879 - 14 = 5865 is a multiple of N.

Because 5644 and 5865 are both multiples of N, their difference must be a multiple of N.

5865 − 5644 = 221 then 221 is a multiple of N.

We have three number of which N can be a multiple of, however we choose to factorize the smallest possible number amongst these three, which is 221. (This is only for simplification of the solution, smaller the number, less the factors)

221 : 1, 13, 17, 221.

There are only two two - digit factors: 13 and 17.

We divide 5865 and 5644 by both numbers.

\frac{5865}{13} = 451.15 \\\frac{5865}{17} = 345 \\\frac{5644}{13} = 434.15 \\\frac{5644}{17} = 332\\

Looking at these results, we know only 17 divides all three numbers.

Hence N=17.

The sum of both digits will be: 1 + 7 = 8

8 0
3 years ago
Three even numbers sum up to 162. the smallest is half the largest and the middle number is 3/4 the largest. what are the three
Scrat [10]
Lets name the largest number as x 
smallest number is half the largest , therefore its x/2 = 0.5x
then middle number is 3/4 the largest , therefore its 3/4x = 0.75x
the sum of the three numbers are 162
the three numbers added are 
x + 0.5x + 0.75x = 162
2.25 x = 162
x = 72
the largest number is 72
then middle number 0.75 x = 0.75 x 72 = 54
smallest number is 0.5x = 0.5 x 72 = 36
answer is  -   36,54,72
3 0
3 years ago
Please help with the question,
castortr0y [4]
The correct answer is x^2-2x+2=0

 The explanation is shown below:

 1. To solve the problem shown in the figure above, you must apply the following proccedure:

 2. You have that the roots of the quadratic equation shown in the figure attached in the problem are:

  x=-1±i

 3.  Then, you know the quadratic formula to solve quadratic equations, which is:

 (-b±√(b^2-4ac))/2a

 4. You can see in the figure that a=1 and c=2; then, by analizing this, you can conclude that the coefficient b is:

 b=-2

 5. Therefore, you can conclude tha the quadratic equation is:

 x^2-2x+2=0

 6. If you want to verify it, apply the quadratic formula to the quadratic equation shown above and you will obtain the roots shown in the figure.
8 0
2 years ago
Read 2 more answers
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