You stack 20 identical cans on top of a block of wood. The total height of the cans and the block of wood is 97 inches. 35 cans on top of the same block of wood is 167.5 inches tall. Your friends are stacking different cans that are all the same size on a different sized block. When they stack 30 of their cans on their block the total height of the cans and block is 185.5 inches. 42 of their cans stacked on top of their block is 257.5 inches tall. What would the total height (in inches) be if you stacked 55 of your cans on their block of wood? inches

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step-by-step explanation:

a

(6r + 7) + (13 + 7r) ( remove brackets and collect like terms )

= 6r + 7 + 13 + 7r

= 13r + 20

b

remove brackets and collect like terms

13 - r - 1 + r

= 12 - r

c

remove brackets and collect like terms

= - 8 - r + 2r - 4

= - 12 + r

d

remove brackets and collect like terms

= 7r - - - 6r

[-   - = - - = - ]

= r -

1. 180°. the sum of the interior angles of a triangle is 180°, for the equilateral triangle that it has three equals side is 60°+60°+60°=180°.

2. 60°. each interior angle of a equilateral triangle is 60°

3. 120°. the measure of ∠m is 120°, the sum of the angles ∠m and ∠n is equal to 180°. so, in order to find the measure of ∠m, we have ∠m+∠n=180° > ∠m=180°-∠n > ∠m=180°-60°=120°.

4. 360°. the sum of the exterior angles of an equilateral triangle is ∠m+∠r+∠x=120°+120°+120°=360°. the exterior angles of any triangle always add 360°.

16 would be your answer