For this case, the first thing we must do is define variables:
x: unknown number (1)
y: unknown number (2)
We now write the equations that model the problem:
their sum is 6.1:
their difference is 1.6:
Solving the system we have:
We add both equations:
Then, we look for the value of y using any of the equations:
Answer:
The numbers are:
Step-by-step explanation:
Answer is in the pic above
Let the parts be 2x, 3x and 5x.
Sum= 25000
Therefore,2x+3x+5x=25000
10x=25000
x=25000/10
x=2500
Therefore, parts:-
1. 2×2500=5000
2. 3×2500=7500
3. 5×2500=12500
Answer:
82.5 feet.
Step-by-step explanation:
Let x represent number of days and y represent height of the plant.
We have been given that Jamie is measuring the growth of a bean plant in her garden. On the first day, the plant is 2.5 inches tall. Point (1,2.5) represent this situation.
On the fourth day, it is 14.5 inches tall. This information can be represented by point (4,14.5).
Let us find slope of the line using given points.
Now, we will point-slope form of equation to find the equation for the height of the plant.
Now, we will substitute in our equation.
Therefore, the height of Jamie’s plant will be 82.5 feet on the twenty-first day if it continues to grow.
Train 1 = (x) = 357.1 mph
Train 2= (x + 5.9) = 363 mph