15. in november, juanita saves $242. in
december, she saves $80 less than in
november. how much does she save
in all? use an equation to represent
the problem.

The total money saved by Juanita in all = $404

And the equation a   =  242 -  80 represent the problem.

Step-by-step explanation:

Here, the money saved in November by Juanita  = $242

Let us assume he money saved by her in December =$ a

Also, Money saved in December = Money saved in November - $80

⇒$ a   =  $242 - $ 80

or , a = $162

So, the money saved in December by Juanita  = $162

Now, the total savings = Money Saved in (November + December)

                                       = $242 + $162 = $404

Hence, The total money saved by Juanita in all = $404

And the equation a   =  242 -  80 represent the problem.

a) false; the points do not have to be in a straight line.

step-by-step explanation:

the points could be in the shape of a triangle

b is incorrect

c is incorrect because it is saying the immediately don't form one when they are capable of doing so

d is incorrect

not only in mathematics, scientific proof also are required in the other field of science. also maths proofs are of particular structure, containing steps and logics. so proving is like doing science, it is science. that's why it is important to prove. 

an inaccurate proof leads to errors, or stating results that are not accurate.  which wil mess the probelm up you dont want this