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Sagot :
To get the answer first we have to find full numbers.
We can use proportion
2/3 ----------------------- 375
1 -------------------------- x
Crossmultiply now
2/3*x=375 /:2/3
x=[tex]375: \frac{2}{3} [/tex]
x=[tex]375* \frac{3}{2}=562 [/tex] - its the answer A)
Now we have to find how much were originally on the card.
To get the answer we can just multiply 562 times 1/4.
562*1/4=140 - its the asnwer B)
We can use proportion
2/3 ----------------------- 375
1 -------------------------- x
Crossmultiply now
2/3*x=375 /:2/3
x=[tex]375: \frac{2}{3} [/tex]
x=[tex]375* \frac{3}{2}=562 [/tex] - its the answer A)
Now we have to find how much were originally on the card.
To get the answer we can just multiply 562 times 1/4.
562*1/4=140 - its the asnwer B)
Let
x--------> total of images that the memory card can contain
we know that
[tex] \frac{2}{3} x=\frac{1}{4} x+375 [/tex]
Multiply by [tex] 12 [/tex] both sides
[tex] 8x=3x+375*12\\ 8x-3x=4,500\\ 5x=4,500\\ x=900 pictures [/tex]
originally on the memory card
[tex] \frac{1}{4} x\\ =\frac{1}{4} *900\\ =225 pictures [/tex]
therefore
the answer part a) is
[tex] 900 pictures [/tex]
the answer part b) is
[tex] 225 pictures [/tex]
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