Answer:
x = 7
Step-by-step explanation:
Add 12 to both sides:
2x + 9 = 5x - 12
2x + 21 = 5x
Subtract 2x from both sides:
21 = 3x
Divide each side by 3:
7 = x
So, x = 7
Answer:
Step-by-step explanation:
Answer:
25 questions
Step-by-step explanation:
At a math competition 2 students can answer 40 questions in 1 hour.
Therefore, 1 student can answer in 1 hour = 
= 20 questions
5 students can answer in 1 hour = 20 × 5 = 100 questions
60 minutes = 1 hour
15 minutes = 
= 0.25 hours
5 students can answer in 0.25 hours = 100 × 0.25
= 25 questions
5 students could answer 25 questions in 15 minutes.
Answer:
Step-by-step explanation:
The easiest way to complete this is too use this data and put it into point-slope form. This is written as, y-y1=m(x-x1)
In this equation y1 is the y- coordinate of your point and x1 is the x-coordinate. M in this case would also be known as the slope.
Now we can submit our data-----
y-4=-5(x-5) -------- simplify
y-4=-5x+25 --------
y=-5x+28
Answer:
m = 685
Step-by-step explanation:
Add 438 to both sides to isolate m. -1123+438 = 685.
