Alex's dog weights 7 times as much as her cat. together the two pets weigh 72. how much does the dog weigh?

In parallelogram abcd the ratio of ab to bcis 5: 3. if the perimeter of abcd is 32 find ab

If tan2a=cot(a+60), find the value of a, where 2a is an acute angle

For the chance to be team captain, the numbers 1-30 are put in a hat and you get two chances to pick a number, without replacement. which formula correctly shows how to find the probability that you choose the number 1 and then 2?