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2 years ago

Just need help for part C. I listed the answers for Part A and B if it helps.

Mathematics

1 answer:

RoseWind [281]2 years ago

4 0

Answer:

Yes.

Step-by-step explanation:

"closed under addition and subtraction" means that if you add (or subtract) two polynomials, you get a polynomial**. If they mean does your work PROVE it, well, it does NOT prove it. But it is a good example showing that:

when you add (or subtract) polynomials, the result is also a polynomial.

**polynomial is an expression like 8x^2-5x-2 or

7-x^2+3 or

4x^3-10x^2-7

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Harry and Taylor are running a concession stand for a concert. Hot dogs at the concession stand cost $1.25 each and sodas cost $

Margarita [4]

Answer:

a-135 hot dogs and 245 sodas were sold.

Step-by-step explanation:

Our equations are:

1.25h + 0.75s = 352.50

h + s = 380

Let's use substitution to solve for this system. In the second equation, let's write h in terms of s:

h + s = 380

h = 380 - s

Now, let's plug in 380 - s for h in the first equation:

1.25h + 0.75s = 352.50

1.25(380 - s) + 0.75s = 352.50

We can now solve for s fairly easily:

1.25(380 - s) + 0.75s = 352.50

475 - 1.25s + 0.75s = 352.50

0.5s = 122.5

s = 245 sodas

We can already see which answer choice will match: A, and that is our answer.

5 0

3 years ago

Read 2 more answers

Dustin bought a DVD player that was marked down from $150 to $100. A video game console was $250 and marked down by $75. Which d

Vika [28.1K]

Answer:

It would be the game console

Step-by-step explanation:

The DVD player went down $50 the console went down about $100 and that is a better idea

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3 years ago

Read 2 more answers

What are the coordinates of point B?

zaharov [31]

Point a is at (-2,4) => (x1,y1)

Midpoint is (2.5, 3.5) => (a,b)

Point B is (x2, y2)

To find midpoint we use formula

$(a=\frac{x_1+x_2}{2} , b= \frac{y_1+y_2}{2})$

a= 2.5, b= 3.5, x1= -2 and y1= 4

Plug in all the values and findout x2, y2

$(2.5=\frac{-2+x_2}{2} , 3.5= \frac{4+y_2}{2})$

multiply 2 on both sides to remove fraction

(5 = -2+x2 , 7 = 4+ y2)

5 = -2+x2, so x2= 7

7 = 4+ y2, so y2= 3

The point B is ( 7, 3)

3 0

3 years ago

Multiply the binomials (2x 6)(x-1)

Vlad [161]

(2x 6)(x-1)=0 happy to help :)

8 0

3 years ago

Alex went to the grocery store and bought 5 avocados. He paid $10 and received $4.50 in change. How much did each avocado cost i

Delvig [45]

Answer:

$1.10

Step-by-step explanation:

We have been that Alex went to the grocery store and bought 5 avocados. He paid $10 and received $4.50 in change.

First of all, we will find amount paid for 5 avocados by subtracting $4.50 from $10.

$\text{Amount paid for 5 avocados}=\$10-\$4.50$

$\text{Amount paid for 5 avocados}=\$5.50$

Now, we will divide $5.50 by 5 to find cost of each avocado.

$\text{Cost of each avocado}=\frac{\$5.50}{5}$

$\text{Cost of each avocado}=\$1.10$

Therefore, the cost of each avocado is $1.10.

3 0

3 years ago