Factor 15a + 21b.

Group of answer choices

3 (15a + 21b)

3 (5a + 7b)

3ab (5 + 7)

36ab

Kai is conducting a study about the percentage of students with jobs. His school has 2500 students. He asks everyone in his drama class to participate in a survey. He bases his findings on these results. Is this a valid study? Why or why not

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when the temperature dropped for 60 degrees to 45 degrees, by what percentage did the temperature change

How could you awnser this and use words770X6=77X6X100

What is the reciprocal of 3/8

Nikki drank 0.8 of a 20.5 ounce container of apple cider. How many ounces of apple cider did Nikki drink?

What is 12 units to right of 0

Distance between (-5,-3) and (1,2)

Alana bought 6 books each book costs 13$ and each bookmark cost 2$ how much did she spend on books

What's the quadratic equation?