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DaniilM [7]
3 years ago
6

A coach is buying snacks for 22 players on a soccer match chip is a total of $77 to buy each player a bottle of water and energy

bar the price of one energy bar is two dollars
Mathematics
1 answer:
KIM [24]3 years ago
7 0

The question is incomplete:

A coach is buying snacks for 22 players at a soccer match. She pays a total of $77 to buy each player a bottle of water and an energy bar. The price of one energy bar is $2. Let w equal the price of a bottle of water. Write an equation that represents the situation.

Answer:

x=44+22w, where

x is the total amount paid

w is the price of a bottle of water

Step-by-step explanation:

With the information provided, you can say that the total amount paid is equal to the result of multiplying the price per energy bar for the number of energy bars purchased plus the result of multiplying the price per bottle of water for the number of bottles of water:

price per energy bar= $2

number of enrgy bars= 22

price per bottle of water= w

number of bottles of water= 22

x=(2*22)+(w*22)

x=44+22w, where

x is the total amount paid

w is the price of a bottle of water

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Given the graph of a line y=−x. Write an equation of a line which is parallel and goes through the point (−8,2).
yarga [219]

y = -x - 6

the equation of a line in ' slope- intercept form ' is

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y = - x is in this form with m = - 1 and c = 0

note that parallel lines have equal slopes thus

the partial equation is y = - x + c

To find c substitute ( - 8, 2 ) into the partial equation

2 = 8 + c ⇒ c = 2 - 8 = - 6

y = - x - 6 ← is the equation of the parallel line


5 0
4 years ago
Paul has $20,000 to invest. His intent is to earn 11% interest on his investment. He can invest part of his money at 8% interest
hjlf

Answer:

In the 8% option , $5,000 should be invested

In the 12% option, $15,000 should be invested

Step-by-step explanation:

Let’s start with the total return.

Since the total return expected is 11%, the amount expected to be returned will be;

11/100 * 20,000 = $2,200

Now, let the amount invested at 8% interest be $x while the amount invested at 12% interest be $y

Mathematically;

x + y = 20,000 ••••••(i)

Now let’s work with the interest part;

On the 8% part, amount of interest expected is 8/100 * x

on the 12% part, amount of interest expected is 12/100 * x

8% of $x + 12% of $y = 2,200

Writing this fully mathematically, we have;

(8/100 * x) + (12/100 * y) = 2,200

8x/100 + 12y/100 = 2,200

Multiply through by 100

8x + 12y = 220,000 ••••••(ii)

Now we have two equations to solve simultaneously;

x + y = 20,000

8x + 12y = 220,000

From i, x = 20,000-y

Substitute this into ii

8(20,000-y) + 12y = 220,000

160,000-8y + 12y = 220,000

4y = 220,000 - 160,000

4y = 60,000

y = 60,000/4

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x = 20,000 -y

x = 20,000 - 15,000

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8 0
4 years ago
Which polynomials are prime? Check all that apply. 2x2 7x 1 5x2 – 10x 5 3x2 8 4x2 – 25 x2 36.
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You can use the definition of prime polynomials to find out which polynomial is prime and which is not.

The prime polynomials in the given options are:

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Option 3: 3x^2 + 8

<h3>What are prime polynomials?</h3>

Those polynomials with integer coefficients that cannot be factored further, with factors of lower degree and integer coefficients are called prime polynomial.

(it is necessary that no factors exists having their coefficients are still integers and they're of lower degree)

<h3>Which of the given polynomials are prime?</h3>

Option 1: 2x^2 + 7x + 1

We have to check it manually. The roots of this equation are

not integer or integer fraction (checked from calculator), and does't factor into smaller integer coefficient polynomials.

(you can check if its getting factored, manually, and most of the times, if it is not prime, it will get factored).

Thus, it is a prime polynomial.

Option 2: 5x^2 - 10x +5

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Thus, it is possible to write it as product of lower degree polynomial with integer coefficients, thus it is not  a prime polynomial.

Option 3: 3x^2 + 8

Since 3 is prime number and since given polynomial is quadratic thus lower degree would be only linear, thus, let

(3x+a)(x+b) = 3x^2 + 8\\3x^2 + (a+3b)x + ab = 3x^2 + 8\\a = -3b\\ab = 8\\(-3b)b = 8\\b = \sqrt{-8/3}

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Thus, it is prime polynomial.

Option 4: 4x^2 - 25

We can rewrite it as:

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Thus, not a prime polynomial.

Option 5: x^2 - 36\\

We can rewrite it as:

x^2 - 6^2 = (x-6)(x+6)

Thus, not a prime polynomial.

Thus,

The prime polynomials in the given options are:

Option 1: 2x^2 + 7x + 1

Option 3: 3x^2 + 8

Learn more about prime polynomials here:

brainly.com/question/10717989

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