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klio [65]
4 years ago
13

What do i do? What do they mean ...HELP ME!!

Mathematics
1 answer:
katrin2010 [14]4 years ago
4 0
Sin x = a/c

cos x b/c

tan x = a/b
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Consider a city whose streets are laid out as a grid. Streets run north-south or east-west. A visitor is dropped off by a cab at
Ann [662]

Answer:

84 possible paths

Step-by-step explanation:

Given

N =3 --- 3 blocks north

E = 6 --- 6 blocks east

Required

Number of distinct path

To solve this question, we make use of the following formula

^{m+n}C_n \ =\ ^{m+n}C_m

The above formula implies that;

On a single path, there is a total of m + n steps to get to a particular position, where each path is either in m direction or n direction.

In this case:

m = 3

n = 6

So, we have:

^{m + n}C_n = ^{3+6}C_6

^{m + n}C_n = ^9C_6

Apply combination formula

^{m + n}C_n = \frac{9!}{(9-6)!6!}

^{m + n}C_n = \frac{9!}{3!*6!}

Expand the numerator

^{m + n}C_n = \frac{9*8*7*6!}{3!*6!}

^{m + n}C_n = \frac{9*8*7}{3!}

Expand the denominator

^{m + n}C_n = \frac{9*8*7}{3*2*1}

^{m + n}C_n = \frac{504}{6}

^{m + n}C_n = 84

<em>Hence, there are 84 possible paths</em>

<em></em>^{m + n}C_m<em> will also give the same result</em>

3 0
3 years ago
Is -4.92 a rational number
Irina-Kira [14]
Yes, its also an integer, rational and real number
4 0
3 years ago
HELP ME!!!!!<br><br> How can I tell if a triangle is Isosceles, equilateral, or a scalene triangle?
alex41 [277]
Equilateral is equal on all 3 sides
Isosceles has 2 congruent sides
Scalene is all three different
7 0
3 years ago
Read 2 more answers
22. What is the simplified form of the following expression? 12[6 ^ 2 / (5 ^ 2 - 4 ^ 2) + 7]
egoroff_w [7]

Answer:

55

Step-by-step explanation:

Its not that hard actually if you break down the exponents and then multiply and add them all together.

3 0
4 years ago
Read 2 more answers
(20 points)
likoan [24]

A = a + b over 2

First multiply both sides by 2:

2A = a+b

Now subtract a from both sides:

b = 2A - a

6 0
3 years ago
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