The sum of three numbers is 13. the sum of twice the first number, 4 times the second number, and 5 times the third number is 40. the difference between 5 times the first number and the second number is 39. find the three numbers.

The first number is 8, the second number is 1 and the third number is 4.

To find all of these, we first need to write a system of equations bsaed on the sentences. For this purpose, we'll use x as the first number, y as the seocnd number, and z as the third number.

x + y + z = 13

2x + 4y + 5z = 40

5x - y = 39

To start solving this, we need to combine the first two equations to get the z term to cancel. Multiply the first equation by -5 and add together.

-5x - 5y - 5z = -65

2x + 4y + 5z = 40

-3x - y = -25

Now we can combine the new equation along with our 3rd equation to cancel out y and solve for x. Multiply the new equation by -1.

3x + y = 25

5x - y = 39

8x = 64

x = 8

Now that we have the value of x, we can solve for y using the 3rd equation.

5x - y = 39

5(8) - y = 39

40 - y = 39

-y = -1

y = 1

Now we can find z using the values we got and the first equation.

x + y + z = 13

8 + 1 + z = 13

9 + z = 13

z = 4

f(x) is going down by 4

step-by-step explanation:

(its either that or its going left by 4)

step-by-step explanation:

if you want to solve percent error follow these steps.

1. subtract the accepted value from the experimental value.

2. take the absolute value of step 1.

3. divide that answer by the accepted value.

4. multiply that answer by 100 and add the % symbol to express the answer as a percentage.

if you want to solve percent of change just do this.

1. work out the difference (increase) between the two numbers you are comparing.

2. divide the increase by the original number and multiply the answer by 100. if your answer is a negative number then this is a percentage decrease.

hope this : )