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Alex Ar [27]
3 years ago
5

Veronica has $2.80, which consists of only quarters and nickels. If the number of quarters is half the number of nickels, how ma

ny coins does she have in total?
Mathematics
1 answer:
Natasha_Volkova [10]3 years ago
7 0

x = 0.5y \\ 0.25x + 0.05y = 2.80
Substitute x into
0.25(0.5y) + 0.05y = 2.80 \\ 0.175y = 2.80 \\ y = 16
x = 0.5(16) \\ x = 8
Total coins = 8 + 16 = 24

Hope this helps. - M
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Answer:

The area of the rectangle on the left side is

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Step-by-step explanation:

The area of any given rectangle can be found by multiplying the length of that rectangle by its width. The rectangle on the left side has a length of 9cm but the width is unknown. To find the width, we subtract 6cm from the width of the bottom rectangle: 10cm. And that gives us 4cm.

Therefore, we can now calculate the area to be: length × width = 9cm × 4cm = 36cm²//

The area of the bottom rectangle can be found similarly by multiplying the length: 2cm by the width: 6cm of that rectangle. And the result gives us: 2cm × 6cm = 12cm²//

The total area of the composite figure is calculated by adding the results from the left and bottom rectangles together. And that gives us: 36cm² + 12cm² = 48cm²//

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