The cost of 3 DVDs and 4 CDs £62.00. the cost of 4 DVDs and 3 CDs is £64.00.find the cost of each. hep

x = 10; y = 8

Step-by-step explanation:

Let

DVDs = x

CDs = y

3x + 4y = 62 (1)

4x + 3y = 64 (2)

Multiply (1) by 4 and (2) by 3 to eliminate x

12x + 16y = 248 (3)

12x + 9y = 192 (4)

Subtract (4) from (3)

16y - 9y = 248 - 192

7y = 56

y = 56/7

y = 8

Substitute y = 8 into (1)

3x + 4y = 62

3x + 4(8) = 62

3x + 32 = 62

3x = 62 - 32

3x = 30

x = 30/3

x = 10

x = 10; y = 8

the smallest possible measurement of the width is 14 feet

step-by-step explanation:

let's assume length of parallelogram is 'l'

width of parallelogram is 'w'

the perimeter of a parallelogram must be no less than 40 feet

so, we get

we are given

length of parallelogram is 6 feet

so,

l=6

we can plug it

now, we can solve for w

subtract both sides by 12

divide both sides by 2

and we get

so,

the smallest possible measurement of the width is 14 feet

false

step-by-step explanation:

the reason i say this is because for a certain length of sides you can pick any two and the length is wither equal or greater than the third side and in this case it's not.

3 + 5 = 8

8 is smaller than 9 which is the third side.

hope this : )