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Nady [450]
3 years ago
7

Simplify -(x-2y)-y I need help

Mathematics
1 answer:
tatiyna3 years ago
3 0
The simplified version of this equation would be

-x + y
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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 helpppppp
Deffense [45]
Your hand looks nice... 

Anyway, 11/4 is the answer


5 0
3 years ago
If you bought a stock last year for a price of $67, and it has risen 12% since then, how much is the stock worth now, to the nea
lisabon 2012 [21]

Answer:$75.04

Step-by-step explanation:

last year price=$67

12% of 67

12/100 x 67

(12 x 67) ➗ 100

804 ➗ 100=8.04

Since it has risen by 12%

There new price is 67+8.04=75.04

4 0
3 years ago
If A is the subset of B, then A intersects B =B or A is a union B = B
vaieri [72.5K]
Answer: A union B = B


The first one should’ve said A intersects B = A because the entirety of A exists in B
7 0
3 years ago
A card is drawn from a well shuffled deck of 52 cards. Find the probability that the card is a red card or a 2.
tamaranim1 [39]
|\Omega|=52

There are 26 red cards and four 2's. But two 2's are red, so |A|=26+4-2=28

P(A)=\dfrac{28}{52}=\dfrac{7}{13}\approx54\%
3 0
3 years ago
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