3 years ago

A stack of boards is 21 inches high. Each board is 1 and 3/4 inches thick. How many boards are there?

1 answer:

6 0

12 boards
divide 21 by 1 3/4

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Mashcka [7]

Answer:

9x + 36 = 10

Step-by-step explanation:

Given

$\frac{3}{4}$ x + 3 = $\frac{5}{6}$

Multiply by the lowest common multiple of 4 and 6, that is 12

12 × $\frac{3}{4}$ x + 12 × 3 = 12 × $\frac{5}{6}$ , that is

9x + 36 = 10 ← equation without fractions

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Nookie1986 [14]

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xenn [34]

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Advocard [28]

Answer: you square root it.

5r^2/5 = 80/5 =16

Sqr root of r^2=Sqr root of 16

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Step-by-step explanation:

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zheka24 [161]

If a system has at least one solution, it is said to be consistent .

If a consistent system has an infinite number of solutions, it is dependent

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