Answer:
A Y-3
Step-by-step explanation:
We know Robert is Y years old and Calvin is 3 years younger. Y-3. For example, Robert is 20, then Calvin would have to be 17. Y=20. 20-3 = 17
Given equations are y = 7x − 8 and y = 5x − 2
We can solve them easily using substion.
Plug y = 7x − 8 into y = 5x − 2
7x − 8 = 5x − 2
or 7x − 5x =8 − 2
or 2x = 6
or 2x/2 = 6/2
or x=3
Now plug x=3 into any of given equations say y = 5x − 2
y = 5(3) − 2=15-2=13
Hence (3,13) is the final answer.
Answer:
There are 177,100 ways.
Step-by-step explanation:
Since there is no regard to order, we use the combinations formula to solve this question.
Combinations formula:
is the number of different combinations of x objects from a set of n elements, given by the following formula.
![C_{n,x} = \frac{n!}{x!(n-x)!}](https://tex.z-dn.net/?f=C_%7Bn%2Cx%7D%20%3D%20%5Cfrac%7Bn%21%7D%7Bx%21%28n-x%29%21%7D)
In this question:
6 keyboards from a set of 25. So
![C_{25,6} = \frac{25!}{6!(25-6)!} = 177100](https://tex.z-dn.net/?f=C_%7B25%2C6%7D%20%3D%20%5Cfrac%7B25%21%7D%7B6%21%2825-6%29%21%7D%20%3D%20177100)
There are 177,100 ways.
Answer:
(0, 3)
Step-by-step explanation:
The y-intercept is point on the y-axis that the line passes through.
You can see the line passes through 3 on the y-axis.
On the y-axis, every point has a 0 for the x-coordinate.
The ordered pair for the point that is 3 on the y-axis is (0, 3).
Answer:
60
Step-by-step explanation:
find the area of the missing rectangle:
18-12=6
4-2=2
6 * 2= 12
find the area of the rectangle:
(18*4)-12=60