To get a b in math, alexandria pappas must average 80 on five tests. scores on the first four tests were 8383, 7373, 8383, and 7777. what is the lowest score that she can get on the last test and still get a b?

The average of a set of numbers is the sum of those numbers, divided by how many they are.

So, if we call the fifth score , our dataset is

And their average is

We want this quantity to be at least 80, so we ask

So, pappas must score at least 80.

d. bc = 12 and ef = 16

step-by-step explanation:

we are given that δabc : δdef such that .

also, it is given that

so, from the options, we need that .

a.

b.

c.  

d.

as, we can see that only option d gives the same ratio as i.e. .

hence, the possible lengths are bc = 12 and ef = 16.

answerthe vertex form

step-by-step explanation: