Answer:
The answer is <em>C</em>
Explanation: Given:A security alarm requires a four-digit code. The code can use the digits 0–9 and the digits cannot be repeated.
there is only 2 numbers which are greater than 7 i.e. 8 and 9. ∴ there is 2 possibility for first place.
For the remaining 3 digits there is 9 possibilities (including 1 which would left after choosing 1 from first place )
No of ways for the alarm code beginning with a number greater than 7= 2 P 1 x 9 P 3
<em>Total ways of code with 4 digits= 10 P 4.</em> Hope this helps :)
Answer:
<or> , <and>
Step-by-step explanation:
The slope would be M= -5/2
I can see that this set of lines were perpendicular until that last line that split 4 and 3. We know that a combination of 4 and 3 is equal to 90°. Plus the angle next to 1 has a measure of 57°. Those angles have the same measure. So now we know what equation to solve.
So now we know that x = 32.
Ehhh i dont get it either im sorry. the wording of these problems makes the question harder than the actual equations