Question

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Answer 1

I need to find the cost of each item before the increase.

Answer 2

help :/

Answer 3

where did those values comes from?

Answer 4

1.15x2 doesnt equal 1.25

Answer 5

Let's say croissant $2.00 coffee $1.00. Croissant is double the price.
If I raise the $2.00 by 15% I get $2.30
If I raise the $1.00 by 25% I get $1.25

1.25x2 does not equal 2.30
The doubling of price can only be seen before the markup of price, not after.

Answer 6

A) Cr + Cof + Fb = 5.50

B) Cr = 2*Cof

So we can use equation B to change equation A into
3Cof + Fb = 5.50

After the price changes, Equation A becomes.
1.15 Cr + 1.25 Cof + Fb = $5.91

The price increase only affects the Croissant and Coffee so we have a .41 increase
0.15 Cr + 0.25 Cof = .41

0.25 Cof = .41 -0.15 Cr

Coffee = 4*(.41 - 0.15 Cr)
Coffee = 1.64 -.60Cr

Coffee = (.328 - .92 Cr)

Answer 7

3 formulas are given\[cr + co + fb = 5.5\]\[cr = 2co\]\[1.15cr+1.25co+fb = 5.91\]---
\[cr + co + fb = 5.5\]\[2co + co + fb = 5.5\]\[fb=5.5-3co\]
\[1.15cr+1.25co+fb = 5.91\]\[1.15(2co)+1.25co+(5.5-3co) = 5.91\]\[2.3co+1.25co+5.5-3co = 5.91\]\[2.3co+1.25co-3co = 5.91-5.5\]\[0.55co=0.41\]\[co =0.75\]
\[cr = 2co\]\[cr=2(0.75)\]\[cr = 1.50\]
\[cr + co + fb = 5.5\]\[1.5 + 0.75 + fb = 5.5\]\[fb = 3.25\]

Answer 8

I cannot get an exact answer. The best I can do is
Coffee = .75
Croissant = 1.50

If these increase in price by 25% and 15% then their new prices are
Coffee = .9375 and
Croissant = 1.725

The price increases are .1875 for coffee and .225 for the croissant which sums to
.4125

Answer 9

\[0.75\times1.25=0.9375 = 0.94\]\[1.50\times1.15=1.725= 1.72\]good old reliable fruit cup\[0.9375+1.725+3.25=5.91\]

Answer 10

Well I didn't know rounding was being taken into account (or even allowed). (That's not the way I learned things when I was in High School). Until this problem, all the word problems I'd ever seen were exactly dead on accurate.