1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
faltersainse [42]
3 years ago
10

Math work plz, i just need to get an answer

Mathematics
2 answers:
Allushta [10]3 years ago
8 0
5x + 5y = 15
x = -y + 3

2x - 2y = 10
2(-y + 3) - 2y = 10
-2y + 6 -2y = 10
-4y = 4
y = -1

5x + 5y = 15
5x + 5(-1) = 15
5x -5 = 15
x = 4

the answer is (4,-1)
Neporo4naja [7]3 years ago
6 0
It is 10, and 15 I believe
You might be interested in
The function C(x)=−20x+1681 represents the cost to produce x items. What is the least number of items that can be produced so th
Reptile [31]

Answer:

<em>The least number of items to produce is 41</em>

Step-by-step explanation:

<u>Average Cost</u>

Given C(x) as the cost function to produce x items. The average cost is:

\displaystyle \bar C(X)=\frac{C(x)}{x}

The cost function is:

C(x) = -20x+1681

And the average cost function is:

\displaystyle \bar C(X)=\frac{-20x+1681}{x}

We are required to find the least number of items that can be produced so the average cost is less or equal to $21.

We set the inequality:

\displaystyle \frac{-20x+1681}{x}\le 21

Multiplying by x:

-20x+1681 \le 21x

Note we multiplied by x and did not flip the inequality sign because its value cannot be negative.

Adding 20x:

1681 \le 21x+20x

1681 \le 41x

Swapping sides and changing the sign:

41x \ge 1681

Dividing by 41:

x\ge 41

The least number of items to produce is 41

8 0
2 years ago
John paid $450 for a new mountain bicycle to sell in his shop. He wants to price it so that he can offer a 10% discount but stil
Ghella [55]

Answer:

$643.50

Step-by-step explanation:

Let i be the profit realized from the sale and d be the discount made on the sale:

#John's selling price can be calculated by first adding profit, i to $450, the d to the new price as:

P_n=P_o(1+i)+d[P_o(1+i)]\\=450(1+0.3)+0.1[450(1+0.3)]\\\\\\=450\times 1.3+0.1(450\times1.3)\\\\=585+58.5\\\\=643.50

Hence, John will resell the bike at $643.50

8 0
3 years ago
X +9 &lt; 9 and x +7 &gt; 5<br> But the less than signs are less than or equal to.
Vera_Pavlovna [14]

Answer:

x<0 less than or equal to and x > -2

Step-by-step explanation:

6 0
3 years ago
Use the Quadratic formula to find all real zeros of the 2nd degree polynomial
schepotkina [342]

Answer:

  x ∈ {-5, -1}

Step-by-step explanation:

Here's the solution using the quadratic formula:

x=\dfrac{-b\pm\sqrt{b^2-4ac}}{2a}=\dfrac{-24\pm\sqrt{24^2-4\cdot 4\cdot 20}}{2\cdot 4}\\\\=\dfrac{-24\pm\sqrt{576-320}}{8}=\dfrac{-24\pm\sqrt{256}}{8}\\\\=\dfrac{-24\pm 16}{8}=-3\pm 2=\{-5,-1\}

The real zeros are -5 and -1.

_____

There are many ways to check your answer. One of them is to look at the given quadratic, which has no changes of sign in its coefficients. (They are all positive.) That means there can be no positive real roots, so already you know that x=0.5 won't work.

Also, the constant in the quadratic is the product of the roots, For your roots, their product is -7/4, so even multiplying by 4 (the leading coefficient in the given quadratic), you don't get anything like 20.

4 0
2 years ago
What is another way to say 1/2 of an apple pie?
gtnhenbr [62]

Answer: Half of a apple pie

Step-by-step explanation:

1/2 is half

5 0
2 years ago
Read 2 more answers
Other questions:
  • What is the percentage of cats in the world
    13·1 answer
  • Is it cheaper to buy 10 single apples or buy them in a bundle of 10?
    6·2 answers
  • Exams are approaching and Helen is allocating time to studying for exams. She feels that with the appropriate amount of studying
    14·1 answer
  • An elevator descends at a<br> constant speed. What is the change in elevation<br> after 19 seconds?
    7·2 answers
  • A piecewise linear function is graphed below. (see image)
    12·2 answers
  • If f(x) = 4x + b and f(2) = 13, then what is the y-intercept? Consider that b is a constant​
    14·1 answer
  • Someone please help me I’ve been trying all day!<br><br> NO LINKS , answers only <br> I MEAN IT!!!!
    7·1 answer
  • Can sumone please help with this. Its super late and I need help
    11·1 answer
  • The length of the United States flag is 1 9/10 times the width of the flag. A particular U.S. flag is 5 feet long. Write and sol
    10·1 answer
  • (GIVING BRAINLYIST) 5 cakes are shared equally between 6 people. What fraction of a cake does each person receive? use fraction
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!