Aubrey buys 3 pens and 5 pencils for $15. She may also buy 4 pens and 6 pencils for $19. How much does one pencil cost?
1 answer:
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let's say
A(-3,1) B(-3,5) C(4,1)
we need to find the perimeter of ABC for that we find each of the sides
AB BC and AC
there is a formula to find the distance between 2 poins
let's say that a point has the structure A(x1,y1) where x=-3 and y=1 and B(x2,y2) where x2=-3 and y2=5
AB=
AB=
AB=
AB=4
we do the same thing for AC and BC
AC=
AC=
AC=7
BC=
BC=
BC=
BC=
The perimeter is equal to the sum of the sides
P=AB+AC+BC=4+7+=11+
Answer:
h = s+100
and just plug in the value of s. I have done it in the figure
