Mandy went rock climbing at the climbing gym for 2 1/2 hours on Thursday. On Saturday, she went to Castle Rock State Park and climbed for 1 1/2 times as long. How much time did she spend rock climbing in all?

6 1/4 hours

Step-by-step explanation:

For Mandy,

On Thursday at the climbing gym ,she spent = 2 1/2 hours rock climbing

= 5/2 hours rock climbing

On Saturday, she went to Castle Rock State Park and climbed for 1 1/2 times as long

= 3/2 times as long as she did at the climbing gym

= 3/2 × (5/2 hours)

= 15/4 hours

The time she spent rock climbing in all is calculated as:

= 5/2 hours + 15/4 hours

Find L.C.M = 4

= (2×5) + (15 × 1)/ 4

= 10 + 15/4

= 25/4 hours

= 6 1/4 hours.

Therefore, she spent 6 1/4 hours rock climbing.

a28=58

step-by-step explanation:

a1=a1+(n-1)d

a28= 4+ (28-1)2

a28=4+(27)(2)

a28=4+54

a28=58