Answer:
5
Step-by-step explanation:
y = 15 - 3x
0 = 15 - 3x
15 - 0 = 3x
x = 5
Answer:
40 minutes
Step-by-step explanation:
Let c represent the number of minutes it would take colleen to finish the job when he is working alone. Hence, it can be represented by the equation:

Solving the quadratic equation to get c gives:
c = -12 and c = 40
Since the time cannot be negative, hence c = 40 minutes.
It would take colleen 40 minutes to clear the yard of leaves alone
It’s 60 degrees
Ex: the total number when the degrees is added together should be 180
Answer:
The converse of the Pythagorean theorem states that if the square of one side of a triangle is equal to the sum of the squares of the other two sides, then the triangle is a right triangle.
It very well could be, but not necessarily. What if q = 10, s = 8, and t = 6?
The statement is that q is less than s, and s is less than t (which therefore also means q is less than t).
However, when we substitute (replace) all the letters with the values we assigned them, we can find that the expression becomes:
10 < 8 < 6
This clearly isn’t right, as 10 is the greatest number there, and 8 is definitely less than 10 and greater than 6.