If Sarah was going to the mall with her three friends. Sarah friends spent 50 dollars each and Sarah spent twice as more as her, How much money do they have all together?

Each friend spent $50 (50+50+50 = 150)

Sarah spent twice as much as them150*2=300

altogether they spent $150+$300 = $450

(just edited sorry for previous mistake)

They would have $250 all together

First you would calculate Sarah's number of friends times $50:

3 * 50 = 150

Then you multiply Sarah's amount by 2, or 50 x 2, which would be 100.

Lastly you add 150 and 100 =

$250

(If Sarah doubled all of her friends, the answer would be 300)