2 years ago

Please help.

Mathematics

1 answer:

arsen [322]2 years ago

3 0

Answer:

dont know

Step-by-step explanation:

welcome to 2021

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In Nathan's baseball card.Collection 58% of the cards are players from the national league. He has 702 baseball cards. About how

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3 years ago

The sum of two numbers is 9.9, and the sum of the squares of the numbers is 53.21. What are the numbers?

Snezhnost [94]

Answer:

There are two possibilities:

$x_{1} = 3.5$ and $y_{1} = 6.4$

$x_{2} = 6.4$ and $y_{2} = 3.5$

Step-by-step explanation:

Mathematically speaking, the statement is equivalent to this 2-variable non-linear system:

$x + y = 9.9$

$x^{2} + y^{2} = 53.21$

First, $x$ is cleared in the first equation:

$x = 9.9 - y$

Now, the variable is substituted in the second one:

$(9.9-y)^{2} + y^{2} = 53.21$

And some algebra is done in order to simplify the expression:

$98.01-19.8\cdot y +2\cdot y^{2} = 53.21$

$2\cdot y^{2} -19.8\cdot y +44.8 = 0$

Roots are found by means of the General Equation for Second-Order Polynomials:

$y_{1} \approx \frac{32}{5}$ and $y_{2} \approx \frac{7}{2}$

There are two different values for $x$ :

$y = y_{1}$

$x_{1} = 9.9-6.4$

$x_{1} = 3.5$

$y = y_{2}$

$x_{2} = 9.9 - 3.5$

$x_{2} = 6.4$

There are two possibilities:

$x_{1} = 3.5$ and $y_{1} = 6.4$

$x_{2} = 6.4$ and $y_{2} = 3.5$

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3 years ago

A man spends $880 in a month. Out of this 26% goes to his rent. How much is his rent?

melisa1 [442]

26% of $880
= 0.26 x 880
= $228.80

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Answer: Rent = $228.80
------------------------------------------------------

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3 years ago

What multiplies to 84 but adds to -25

Law Incorporation [45]

Answer:

the correct answer is 4 and 21

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3 years ago

Read 2 more answers