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3 years ago

If 14 meters of ribbon cost $19, how much would 21 meters of ribbon cost? NEED HELP ASAP

Mathematics

2 answers:

ikadub [295]3 years ago

8 0

Answer : The cost of 21 meter of ribbon is, $28.5

Step-by-step explanation :

As we are given that, the cost of 14 meter of ribbon is $19.

Now we have to determine the cost of 21 meter of ribbon.

As, the cost of 14 meter of ribbon = $19

and, the cost of 1 meter of ribbon = $\frac{1}{14}\times \$ 19$

So, the cost of 21 meter of ribbon = $\frac{21m}{14m}\times \$ 19$

= $ 28.5

Therefore, the cost of 21 meter of ribbon is, $28.5

Paladinen [302]3 years ago

5 0

Answer:

21 meters would cost $28.5

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Alekssandra [29.7K]

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3 years ago

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Find sin 2x, cos 2x, and tan 2x from the given information.<br> cscx=4,tanx<0.

lutik1710 [3]

Answer:

Step-by-step explanation:

Given the expression cosec (x) = 4 and tan(x)< 0

since cosec x = 1/sinx

1/sinx = 4

sinx = 1/4

From SOH, CAH TOA

sinθ = opposite/hypotenuse

from sinx = 1/4

opposite = 1 and hypotenuse = 4

to get the adjacent, we will use the Pythagoras theorem

adj² = 4²-1²

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From double angle formula;

sin2x = 2sinxcosx

sin2x = 2(1/4)(√15/4)

sin2x = 2√15/16

sin2x = √15/8

for cos2x;

cos2x = 1-2sin²x

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cos2x = 1-2(1/16)

cos2x= 1-1/8

cos2x = 7/8

for tan2x;

tan2x = tanx + tanx/1-tan²x

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tan2x = 2(-1/√15)/1-(-1/√15)²

tan2x = (-2/√15)/(1-1/15)

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tan2x = -30/14√15

tan2x = -30/7√15

rationalize

tan2x = -30/7√15 * √15/√15

tan2x = -30√15/7*15

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3 years ago

HELP PLEASE

Georgia [21]

Answer:

$\huge\boxed{\sf No}$

Step-by-step explanation:

Evan spent 20 hours doing homework last week

25 hours were spent this week.

<u>Let's see what 125% of 20 equals:</u>

= (125 / 100) * 20

= (125 / 10) * 2

= 125 / 5

= 25 hours

But,

<u>It is written that Evan thought he spent 125 % more than the last week which means:</u>

= (125% of 20) + 20

= 25 + 20

= 45 hours

He should've said that he has given 25% more time than the last week.

(<u>Note that:</u> 25 % of 20 equals 5 so 25 % more than last week will be equal to (25 % + 20) = (5+20) = 25)

$\rule[225]{225}{2}$

Hope this helped!

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3 years ago

A group of 12 people want to go to a concert. They can travel in a small car that takes one driver and one passenger and two car

trapecia [35]

Answer: There are 60 ways that they can travel to the concert.

Step-by-step explanation:

Since we have given that

Number of people want to go to a concert = 12

Number of cars = 3

Number of drivers in the group = 5

So, using the "Fundamental theorem of counting":

We get that

$5\times 4\times 3\\\\=60$

Hence, there are 60 ways that they can travel to the concert.

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3 years ago