Question

If a square of side 1.5 m is cut out from
a square plastic sheet of side 3 m, find
the area of the remaining sheet.​

Answer 1

Answer:

ANSWER EXPLANATION: There are two ways to solve this question. The faster way is to multiply each side of the given equation by ax−2 (so you can get rid of the fraction). When you multiply each side by ax−2, you should have:

24x2+25x−47=(−8x−3)(ax−2)−53

You should then multiply (−8x−3) and (ax−2) using FOIL.

24x2+25x−47=−8ax2−3ax+16x+6−53

Then, reduce on the right side of the equation

24x2+25x−47=−8ax2−3ax+16x−47

Since the coefficients of the x2-term have to be equal on both sides of the equation, −8a=24, or a=−3.

The other option which is longer and more tedious is to attempt to plug in all of the answer choices for a and see which answer choice makes both sides of the equation equal. Again, this is the longer option, and

Answer 2

Step-by-step explanation:

When a square of 6cm is cut from the four corners of the sheet, both the length and and the width will be reduced by 2×6=12 cm

∴ length of box =42−12=30cm

width of box =30−12=18cm

The height of the box =6cm (Which is folded up)

The capacity of the box = base areas × height

=30×18×6=3240cm

3