Step-by-step explanation:
8y 2-4y+1/2y
=8y-4y+1/2y+2
=4y+1/2y+2
=4/2y+2
Answer:
k = 3.33
Step-by-step explanation:
x = 2
y = 3
x - ky + 8 = 0
2 - k(3) + 8 = 0
2 - 3k + 8 = 0
10 - 3k = 0
<u>-10 -10</u>
-3k = -10
k = 3.33
QUESTION:
The code for a lock consists of 5 digits (0-9). The last number cannot be 0 or 1. How many different codes are possible.
ANSWER:
Since in this particular scenario, the order of the numbers matter, we can use the Permutation Formula:–
- P(n,r) = n!/(n−r)! where n is the number of numbers in the set and r is the subset.
Since there are 10 digits to choose from, we can assume that n = 10.
Similarly, since there are 5 numbers that need to be chosen out of the ten, we can assume that r = 5.
Now, plug these values into the formula and solve:
= 10!(10−5)!
= 10!5!
= 10⋅9⋅8⋅7⋅6
= 30240.
Don’t keep your cool and tell her after class or tell her “Can you not”
20/28 = 3x / (4x + 2)
84x = 20(4x + 2)
84x - 80x = 40
4x = 40
x = 10
so the 2 lines are equal to 30 and 42
