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3 years ago

\-x+sqrt1−x 2\-=sqrt2(2x 2−1).

Mathematics

1 answer:

lesya [120]3 years ago

5 0

Answer:

Step-by-step explanation:

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Tickets to the movies are $7 for adults and $4 for children. If 272 tickets

rewona [7]

Answer:

202 tickets for adults were sold and 70 tickets for children are sold.

Step-by-step explanation:

Solve this question using simultaneous linear equation.

•Let the number of tickets sold for adults be a

•Let the number of tickets sold for children be b

The question stated that 272 tickets were sold altogether. So:

$a + b = 272$

Now, make sure that only one of the unknown values remain on the left hand side. For example:

$a = 272 - b$

I will refer to the above equation as equation 1.

Now, the question also stated that the tickets sold $1694. This means that:

$7a + 4b = 1694$

I will refer to this equation as equation 2.

Now, substitute equation 1 into equation 2 by replacing the a in equation 2 with the values on the right hand side in equation 1. For example:

$7(272 - b) + 4b = 1694$

Then just solve the equation by finding the value of b.

$7(272 - b) + 4b = 1694 \\ 1904 - 7b + 4b = 1694 \\ 1904 - 3b = 1694 \\ 1904 - 1694 = 3b \\ 210 = 3b \\ b = 210 \div 3 \\ = 70$

Lastly, find the value of a. Just take the value of b and then substitute into equation 1.

$a = 272 - b \\ = 272 - 70 \\ a = 202$

4 0

3 years ago

This Question: 1 pt 10 of 10 (8 complete) Th One day a store sold 30 sweatshirts. White ones cost $11.95 and yellow ones cost $1

ohaa [14]

W + y = 30......w = 30 - y
11.95w + 12.50y = 364.55

11.95(30 - y) + 12.50y = 364.55
358.50 - 11.95y + 12.50y = 364.55
-11.95y + 12.50y = 364.55 - 358.50
0.55y = 6.05
y = 6.05 / 0.55
y = 11 <=== there were 11 yellow sweatshirts sold

w + y = 30
w + 11 = 30
w = 30 - 11
w = 19 <=== there were 19 white sweatshirts sold

3 0

3 years ago

Jerry deposited 20,000 on an investment that will give 1,750 for every year that his money stays in the account. How much money

lesya692 [45]

Answer:

$34,000

Step-by-step explanation:

Jerry will get $1,750 for every year that his money stays in the account thus for 8 years he will get:

8*1,750 = $14,000

Together with the deposited money:

$20,000 + $14,000 = $34,000

By the end of year 8 there will be $34,000 of Jerry's account.

3 0

2 years ago

Does anyone know the answer to these questions?

Sauron [17]

Answer:

Step-by-step explanation:

3 0

4 years ago

16 üssü 5 sayısının 1 ➗ 8 i kaçtır?

stiks02 [169]

Answer:

The answer is 131072

Step-by-step explanation:

$\frac{1}{8} \times {16}^{5} = 131072$

7 0

3 years ago