Brainliest will mark Which statement shows the associative property of addition?

13⋅(k⋅5)=(k⋅5)⋅13

13⋅(k⋅5)=(13⋅k)⋅5

13+(k+5)=(13+k)+5

23+6y=6y+23

It is saturday morning and jeremy has discovered he has a leak coming from the water heater in his attic. since plumbers charge extra to come out on the weekends, jeremy is planning to use buckets to catch the dripping water. he places a bucket under the drip and steps outside to walk the dog. in half an hour the bucket is 1/5 of the way full. what is the rate at which the water is leaking per hour?

Atriangular field has sides of lengths 21, 39, and 41 yd. find the largest angle. (round your answer to the nearest degree.)

Which of the following vectors are orthogonal to (2,1)? check all that apply