An access code consists of of a letter followed by four digits. any letter can be used, the first digit cannot be 0, and the last digit must be even. (a) find the number of possible access codes. (b) what is the probability of randomly electing the correct access code on the first try? (c) what is the probability of not selecting the right access code on the first try?

(a)117000  (b)1/117000 (c)116999/117000

Step-by-step explanation:

(a)There are 26 letters, hence 26 options for the first character

There are 9 options for the second character, because, you can place 1,2,3,4,5,6,7,8,or 9.

For the third character you can have 10 options, since, you can 1 through 9 and 0.

The 4th one has 10 options too since the same terminology is used for the 3rd digit as the 4th one.

For the last digit, You have 5 options,0,  2, 4, 6, and 8.

Hence, the answer is 26*9*10*10*5 = 117000

(b)There is only 1 correct code, so the chance of getting it right is 1/117000.

(c)There are 117000-1 ways oh getting it wrong, so 116999/117000.

1.677

step-by-step explanation:

i'm not good at explaining stuff but if you need an answer i'm here for you.

x + y = 90 5x – 10y = 90 90 – 10y = 5x 90 + 10y = 5x

step-by-step explanation:

last month maria hiked the 5-mile mountain trail a number of times and she hiked the 10-mile canal trail several times. let x represent the number of times she hiked the 5-mile trail, and let y represent the number of times she hiked the 10-mile trail. if she hiked a total of 90 miles, which equation can be used to find the number of times maria hiked each trail? x + y = 90 5x – 10y = 90 90 – 10y = 5x 90 + 10y = 5x