Carol has only 20p and 10p coins in her purse. She has three times as many 20p coins as 10p coins.
If Carol has £3.50 altogether, how many 20p coins does she have?

There are 15 20p coins

Step-by-step explanation:

That gives you full marks on math watch

describing distributions is one of the key skills you’ll need to earn a high score on the ap statistics exam. if you need proof of this, just flip through some past exam questions, which can be found at the collegeboard website. you’ll notice that the first free response question is almost always a question requiring you to look at a graph and describe it.

step-by-step explanation: just trying to get points sorry : (

x² + 3x + 7 = 0       [ax² + bx + c]

a = 1

b = 3

c = 7

quadratic formula:

    (+/- is this ±)

plug in the numbers into the variables

your answer is a