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Marysya12 [62]
3 years ago
15

Are the following proportional? Explain or show your reasoning 3/5 and 18/25

Mathematics
1 answer:
kykrilka [37]3 years ago
7 0

Answer:

No, they are not proportional. 3/5 with equal out to 15/25 by using the method of Least Common Denominator!

Step-by-step explanation:

Hope this helps :)

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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
Use the arc length formula to find the length of the curve y = 5x − 4, −1 ≤ x ≤ 3. check your answer by noting that the curve is
AnnZ [28]
The given curve is y = 5x -4,  -1 ≤ x ≤ 3.

The length of the arc is computed from the formula
S= \int_{-1}^{3} \,\sqrt{1+ (\frac{dy}{dx} )^{2}} \, dx

The derivative is 
y' = 5

Therefore
S = \int_{-1}^{3} \sqrt{1+25} \, dx =\sqrt{26}*(3-(-1))=20.396

Note that 
x = -1 +> y = 5(-1) - 4 = -9
x = 3 => y = 5(3) - 4 = 11
The distance between the points (-1, -9) and (3, 11) from the distance formula is
D = √[(3-(-1))² + (11-(-9))²] = √(16+400) = 20.396
This answer agrees with that obtained by integration.

Answer: 20.396
Obtained by integration and verified by the distance formula.

6 0
3 years ago
Yolanda paid for her movie ticket using 28 coins, all nickels and quarters. The ticket cost $4. Which system of linear equations
Alexus [3.1K]
N + q = 28
.05n + .25q = 4.00
4 0
3 years ago
cindy bought 7/8 yard of ribbon at the craft store . jacob bought 4/5 the length of ribbon as cindy. how many yards of ribbon di
tresset_1 [31]
To solve this, multiply the fractions by each other.
7/8*4/5
7*4=28
8*5=40
28/40

"B" would be the correct answer but, it the fraction should be reduced to 7/10.
5 0
2 years ago
Solve for x. 4x-5=9+20
pickupchik [31]

Answer:

x = 8.5

Step-by-step explanation:

4x-5=9+20   (evaluate right side)

4x - 5 = 29   (add 5 to both sides)

4x = 29 + 5

4x = 34   (divide both sides by 4)

x = 34/4

x = 8.5

7 0
3 years ago
Read 2 more answers
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