There is a formula for adding consecutive integers.
sum = (n * (n+1)) / 2
for summing 1 through 12 it is
sum = (12 * 13) / 2 = 156/2 = 78
The clock goes through two "12-hour cycles" in a day, so the answer is 2 * 78 or 156 times.
Answer:
(x-18)²+(y+18)²=18².
Step-by-step explanation:
1) the formula is: (x-x₀)²+(y-y₀)²=r², where (x₀;y₀) - coordinates of the centre, r - the length of the radius;
2) according to the formula above:
(x-18)²+(y+18)²=18².
Parallel sides mean that they are always the same distance from each other and will never touch. Knowing that, let's think of the shapes.
Rectangle: Yes, opposite sides are parallel. The two opposite sides of a rectangle will never touch.
Rhombus: Think of it as a diamond. You can still view it as a rectangle that has the top shifted over a bit. Therefore, yes, opposite sides are parallel because they will never touch.
Square: Is basically the same as the rectangle. Therefore, the answer is yes, opposite sides of squares are parallel.
Parallelogram: The definition of a parallelogram, like in its name, is a four-sided figure with opposite sides parallel. Therefore, yes, parallelograms have opposites sides that are parallel.
Therefore, the answer is all four of them.
Answer:
If Frank is planting b seeds in one and 5b + 10 in the other, the expression showing the total is b + (5b + 10), or 6b + 10 seeds.
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