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3 years ago

Plz help its timed I need to get my grades up

Mathematics

2 answers:

Svetradugi [14.3K]3 years ago

8 0

Answer:

4 12/18, simplified is 4 6/9

Step-by-step explanation:

You change the fractions to improper fractions so 10 1/2 to 21/2 and 2 1/4 to 9/4. Since we can't divide, we change 9/4 to 4/9 and multiply. 21 times 4 is 84 and 2 times 9 is 18. Since that is an improper fraction, we have to change it to a mixed number. 18 can go into 84 4 times, and 18 x 4 is 72. 84 minus 72 is 12 so the final answer is 4 12/18 (simplified 4 6/9)

Hope this helps :)

patriot [66]3 years ago

4 0

5 1/4
Explanation:
1/2 is equivalent to 2/4
10 divided by 2 is 5

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The meal tax at a restaurant is 5%. What is the tax on a dinner that costs $24?

Rudik [331]

The tax is the money on top of the original cost of the dinner. So, we need to find 5% of 24, as that is what the tax is at the restaurant - 5% of the price.

24 x 0.05 = 1.20

The tax on a dinner that costs $24 is $1.20.

Hope this helps!! :)

6 0

3 years ago

Question10??need help

GarryVolchara [31]

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7 0

3 years ago

Read 2 more answers

A hockey team plays in an arena with a seating capacity of 15,000 spectators. With the ticket price set at , average attendance

Goshia [24]

Answer:

Ticket price 11,5 $

R(max) = 132750 $

Step-by-step explanation:INCOMPLETE QUESTION

The ticket price is missing

We will assume 12 $

Let call x the decreasing number of the ticket price

The revenue is

R = ticket price * numbers of spectator

R(x) = ( 12 - x ) * ( 11000 + 1000*x ) for all 0 ≤ x ≤ 4 ( the seating capacity is 15000 )

R(x) = 132000 + 12000*x - 11000*x - 1000*x²

R(x) = 132000 + 1000*x - 1000*x²

Taking derivatives on both sides of the equatio we get:

R´(x) = 1000 - 2000x

R´(x) = 0 ⇒ 1000 - 2000x = 0

x = 1000/2000 ⇒ x = 0,5 $

We notice that R´´(x) < 0 then we have a maximum for x = 0,5

and the price is 12 - 0,5 = 11,5 $ for ticket

and the R(max) is

R(max) = 132000 + 1000*0,5 + 1000* (0,5)²

R(max) = 132000 + 500 + 250

R(max) = 132750 $

7 0

3 years ago

When Mei does 17 push-ups and 6 sit-ups, it takes a total of 35 seconds. In comparison, she needs 41 seconds to do 20 push-ups a

Romashka [77]

Answer:

It takes 1 seconds for push-ups and 3 seconds for sit-ups for Mei to do exercise.

Step-by-step explanation:

Given:

Let the time taken for push-ups be 'x'.

Let the time taken for sit-ups be 'y'.

Now Given:

17 push-ups and 6 sit-ups, it takes a total of 35 seconds.

So we can say that;

$17x+6y=35 \ \ \ \ equation \ 1$

Also Given:

41 seconds to do 20 push-ups and 7 sit-ups.

so we can say that;

$20x+7y=41 \ \ \ \ equation \ 2$

Now Multiplying equation 1 by 7 we get;

$7(17x+6y)=35\times7\\\\119x+42y= 245 \ \ \ \ equation \ 3$

Now Multiplying equation 2 by 6 we get;

$6(20x+7y)=41\times6\\\\120x+42y = 246 \ \ \ \ equation\ 4$

Now Subtracting equation 3 from equation 4 we get;

$120x+42y-(119x+42y)=246-245\\\\120x+42y-119x-42y=1\\\\x=1\ sec$

Now substituting the value of x in equation 1 we get;

$17x+6y=35\\\\17\times1+6y=35\\\\17+6y=35\\\\6y=35-17\\\\6y= 18\\\\y=\frac{18}6 = 3\ seconds$

Hence It takes 1 seconds for push-ups and 3 seconds for sit-ups for Mei to do exercise.

7 0

3 years ago

Please help … will mark brainliest

vlada-n [284]

Answer:

k = 3

Step-by-step explanation:

Expanding the first term, we find 1/x at 10(kx)²(1/x)³ = 10k²/x

Expanding the first term, we find 1/x at 8*1⁷(-2/x)¹ = -16/x

Then

10k² - 16 = 74

k = 3

4 0

2 years ago

Plz help its timed I need to get my grades up ​

Plz help its timed I need to get my grades up