cost of 3 pens is equal to that of 5 copies. what will be the cost for 25 copies if 9 pens and 7 copies cost Rs.264

Rs. 300

Step-by-step explanation:

We'll call the cost of pens , and we'll call the cost of copies .

We can write the simultaneous equations:

We'll times by 3 to get .

Then we'll substitue this into to get

So the cost of 25 copies will be

(Rs)

parallel and congruent

step-by-step explanation:

the movement of translation is linear.   these have the same translation because you are using the same rule for each point of the triangle so you will see the same slope being used to get from a point on the triangle to its image.

same slope!   you should think parallel when you see those 2 word together (well unless it's the same line but it can't be because we are coming from different points here)

congruent! because each point is being moved the same distance.

option a is correct.

step-by-step explanation:

scale factor: it is used to find proportional measurements.

proportions means having the same ratio.

scale factor is the ratio of the model measurement to the actual measurement in a simplest form.

or we can say that the ratio of any two corresponding lengths in two similar geometric figures

if the scale factor is more than 1, then it is an enlargement,

if the scale factor less than 1, then it is a reduction.

given the two geometric figure:

by definition of proportions, we have