Answer:
He can grade 1.25 assignments in 1 minute.
Step-by-step explanation:
Because the teacher can grade 25 assignments in 20 minutes, we can dive 25 by 20 to get the constant rate.
So he can grade 1.25 assignments in 1 minute.
Answer:
3*x + y = 25
Step-by-step explanation:
Here we have the sentence:
"three times a number (let's call it x) added to another number (let's call it y) gives 25"
We can write this as:
3*x (3 times the first number)
+ y (added to another number)
= 25 (gives 25)
Writing this as an equation, we get:
3*x + y = 25
This is the equation we wanted.
Answer:
x= 9, x= 2
Step-by-step explanation:
x^2- 2x- 9x+ 18= 0
x (x-2) -9 (x-2)
(x-9) (x-2)
x-9= 0, x-2= 0
Therefore, x= 9, x= 2
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Subtract 3x from both sides
-14=-2x
Divide both sides by -2
7=x
Answer:
Step-by-step explanation:
Start your table by typing "s" and "A = s^2" as headers.
We're told not to exceed s = 5 units. And s cannot be negative, as all length measurements are positive or zero.
Thus, if s = 0, A = (0)^2 = 0 and you have the point (0,0).
If s = 1, A = (1)^2 = 1 and you now have the point (1,1) in the second row of your table.
If s = 2, A = (2)^2 = 4 => (2,4)
and so on:
s A = s^2
0 0
1 1
2 4
3 9
Keep going until you've finished with s = 5 units.