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svetoff [14.1K]
2 years ago
7

Please help me with this permutations and combinations math problem​

Mathematics
1 answer:
Irina-Kira [14]2 years ago
7 0

Answer:

Step-by-step explanation:

C^n_r=\frac{n!}{(n-r)!r!}\\P^n_r=\frac{n!}{(n-r)!}

\frac{(28+70)(30-6)}{(30)^2-6^2}=\frac{49}{18}=2.722222222222222

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3 years ago
A plane is 24,000 feet above sea
IrinaVladis [17]

Answer:

A. -500

Step-by-step explanation:

Find the slope using rise over run (change in y / change in x)

Find the change in the y values (height of the plane):

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3 years ago
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My brain stopped. Please help
Over [174]

Answer:

∠1 = 90°

∠2 = 66°

∠3 = 24°

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Step-by-step explanation:

Usually the diagonals of a rhombus bisect each other at right angles.

Thus; ∠1 = 90°

Since they bisect at right angles, then;

∠R1S = 90°

Now, sum of angles in a triangle is 180°

Thus;

66° + 90° + ∠4 = 180°

156 + ∠4 = 180

∠4 = 180 - 156

∠4 = 24°

Now, also in rhombus, diagonals bisect opposite angles.

Thus; ∠4 = ∠3

Thus, ∠3 = 24°

Similarly, the diagonal from R to T bisects both angles into 2 equal parts.

Thus; ∠2 = 66°

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