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Earn +20 ptsQ: How many sides do 3 decagons and 5 triangles have altogether?
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How many sides do 5 decagons and 3 pentagons have altogether?
A pentagon has five sides, and a decagon has ten sides. So 3 pentagons and 5 decagons have (35)+(510) = 65 sides altogether
How many sides do 4 decagons 3 dodecagons 1 nonagon and 3 triangles have altogether?
1*9 + 3*3 + 4*10 + 3*12 = 9 + 9 + 40 + 34 = 92
How many sides do 5 decagons and 5 octagons have altogether?
A decagon has 10 sides and an octagon has 8. 5*8 + 5*10 = 90 sides
How many sides do 2 nonagons and 2 decagons have in all?
38 sides
How many sides do 4 decagons 1 hexagon 3 nonagons and 2 quadrilaterals have altogether?
1*6 + 2*4 + 4*10 + 3*9 = 6 + 8 + 40 + 27 = 81
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