PLEASE ANSWER QUICKLY!! Martha has a 4-digit combination lock on her briefcase and has forgotten the combination. Each of the four digits on her lock can read any digit from 0 through 9. If she
knows that the first digit is 6, and the second digit is prime, how many numbers must Martha try before the lock is sure to open? (Note: Neither "0" nor "1" are prime
numbers!)

224

Step-by-step explanation:

1st Digit - 9 (1 way)

2nd Digit - 2, 3, 5, 7 (4 ways)

3rd Digit - (10-2) ways

4th Digit - (10-3) ways

Therefore, the number of ways are 1 × 4 × 8 × 7

= 224 ways

sup

step-by-step explanation:

options a,b,c are the right answer.

step-by-step explanation:

a linear parent function is always represented as y = x

if we write this function in the form of y=mx+c

⇒

or  

now if we plot a graph we will find these characteristics:

1) y intercept of the graph is zero so its a straight line passing through origin.

2) as we can see in both the forms of function written, values of x and y may be either positive or negative for the positive slope means points on the graph are either in first quadrant or in third one.

3) it's slope is one.