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
pishuonlain [190]
3 years ago
12

Please help!! I don't get this.

Mathematics
1 answer:
Lynna [10]3 years ago
3 0
The answer to question 5 is -3.
The answer to question 9 is -5.<span>
</span>The answer to question 7 is 28x^3y^4.
You might be interested in
Someone start a convo in the comments or try and message me idk how
ivanzaharov [21]

Answer:

Brainly is a platform that is used to help students in need. There are many social networks that offer socializing with many people from every country in the world.

I suggest you install any of those apps, and try find someone to talk to.

On this platform, we offer knowledge and help when it comes to important tests, quizzes and other knowledge-related topics.

Hope I helped.

6 0
3 years ago
Write an equation of a parabola that passes through (3,-30) and has x-intercepts of -2 and 18. Then find the average rate of cha
Nookie1986 [14]

Answer:

The equation of the parabola is y = \frac{2}{5}\cdot x^{2}-\frac{32}{5}\cdot x -\frac{72}{5}.  The average rate of change of the parabola is -4.

Step-by-step explanation:

We must remember that a parabola is represented by a quadratic function, which can be formed by knowing three different points. A quadratic function is standard form is represented by:

y = a\cdot x^{2}+b\cdot x + c

Where:

x - Independent variable, dimensionless.

y - Dependent variable, dimensionless.

a, b, c - Coefficients, dimensionless.

If we know that (3, -30), (-2, 0) and (18, 0) are part of the parabola, the following linear system of equations is formed:

9\cdot a +3\cdot b + c = -30

4\cdot a -2\cdot b +c = 0

324\cdot a +18\cdot b + c = 0

This system can be solved both by algebraic means (substitution, elimination, equalization, determinant) and by numerical methods. The solution of the linear system is:

a = \frac{2}{5}, b = -\frac{32}{5}, c = -\frac{72}{5}.

The equation of the parabola is y = \frac{2}{5}\cdot x^{2}-\frac{32}{5}\cdot x -\frac{72}{5}.

Now, we calculate the average rate of change (r), dimensionless, between x = -2 and x = 8 by using the formula of secant line slope:

r = \frac{y(8)-y(-2)}{8-(-2)}

r = \frac{y(8)-y(-2)}{10}

x = -2

y = \frac{2}{5}\cdot (-2)^{2}-\frac{32}{5}\cdot (-2)-\frac{72}{5}

y(-2) = 0

x = 8

y = \frac{2}{5}\cdot (8)^{2}-\frac{32}{5}\cdot (8)-\frac{72}{5}

y(8) = -40

r = \frac{-40-0}{10}

r = -4

The average rate of change of the parabola is -4.

3 0
3 years ago
Find the product. (y^3)^2 * y^7
Natasha_Volkova [10]
Firstly, let's take first factor:
(y^3)^2 = y^(3*2) = y^6
and then:
y^6 * y^7 = y^(6 + 7) = y^13

8 0
3 years ago
PLEASE HELP!!! I do not understand!!!
sladkih [1.3K]

Answer:

110 + 5x (I'm not sure if you need the dollar signs...if you do, one goes in front of the 110 and one goes in front of the 5)

Step-by-step explanation:

$20 + $90 = $110

<u><em>Equation:</em></u>

110 + 5x

110 represents the base cost of the turtle and the terrarium.

5 represents the cost of the turtle food

x represents the number of weeks that she is purchasing the food.

4 0
3 years ago
In the number 3.072 the digit 7 is in the ? place and the digit 2 is in the ? place.​
notka56 [123]

Answer:

7= Hundredths

2=Thousandths

8 0
3 years ago
Other questions:
  • Plz help! Convert 6/9 into fractions with a denominater of 27 A. 6/7 B.21/27 C. 9/27 D.18/27
    8·1 answer
  • 25a^2-30a+9 factor ?
    6·1 answer
  • How do you do this function (5a - 6)(2a - 1)
    8·1 answer
  • What is 3 root of − 216 end root
    12·1 answer
  • Select the correct answer.
    15·1 answer
  • 4321342345670<br> +22347968
    5·1 answer
  • Consider the following system of linear equations: Instructions: Solve the system by reducing its augmented matrix to reduced ro
    12·1 answer
  • I added a picture : Determine which of the lines, if any, are parallel or perpendicular. Explain.
    9·1 answer
  • FREEEEE POINTS FOR THE FIRST PERSON THAT ANSWERS.
    15·2 answers
  • Please don't put links here so follow what it says GOT IT?
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!