Let's set up a formula for this, where x is the amount of dvds he started with:
x-45+10=15
x-35=15
+35 +35
x=50
He had 50 DVDs to begin with.
Check
50-45+10
=15
Answer:
Step-by-step explanation:
A diameter is two times longer than a radius. Therefore, if the diameter
d = 24in, then the radius r = (24in) : 2 = 12in.
The formula of an area of a circle:
Substitute:
Then
Answer:
it's 360.
Step-by-step explanation:
138+72+60+90=360
Answer:
185
Step-by-step explanation:
14.8 / 0.08 = 185
Best of Luck!
Answer:
Step-by-step explanation:
Find the difference between the 2 points.
For example, (8, 9) (5, 3).
Compare the difference between the x's, in this case 8 and 5. The difference is 3. Do the same with the y's, 9 and 3. The difference is 6.
To find the slope, it's y/x. The slope in this situation is 6/3. Simplify. The slope is 2.
To find the y-intercept, insert the slope and one of the 2 points in the beginning into y = mx + b & solve for b.
For example, if we use the ordered pair (5, 3) the equation would look like:
3 = 2(5) + b, Solve for b.
Multiply. 3 = 10 + b
Get b by itself by adding - 10 to both sides.
-7 = b
The y-intercept is -7. So, in this case, the equation is y = 2x - 7.
