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
Andru [333]
3 years ago
8

Could someone answer and explain these to me? That would be great, thanks!

Mathematics
2 answers:
Flura [38]3 years ago
6 0

Answer:

y=-x^2

Step-by-step explanation:

given that y = x^2 is the function.

For equivalent to -y, we can multiply this equation both the sides by -1

We get -y = -x^2

Hence option G is right.

Also y =x^2 is a parabola with vertex at origin open up.

Hence if F is selected we get -y =(-x)^2 = x^2, this will make the parabola open down and hence this option is wrong.

H: -y=-x is wrong because this represents a line but we had original equation as that of a parabola

J) -y = x^(-2) means x^2y =-1

This implies that rate of change of y = 2/x^3 but rate of change of y has to equal 2x since y = x^2 is original. Hence only option G is right.

pav-90 [236]3 years ago
6 0

These are two questions and two answers.


Question 1. When y = x², which of the following expressions is equivalent to - y?


Answer: the option G. -x².


Explanation:


The important thing is to be careful with the use of the negative sign before the function because a typical mistake is to incorporate the negative sign inside the parentheses, which yields to square it resulting, mistakenly, in a positive value.


The correct steps are:


  • Given y = x², find - y
  • Muliply both sides of the equation by - 1: - y = - (x²)
  • Delete the negative sign before the parentheses: - y = - x².

So, the answer is the option G.


Question 2. For the function h(x) = 4x² - 5x, what is the value of h(-3)?


Answer: option D. 51


Explanation:


Since, you have the explicit function h(x), to find h(-3), you just must subsititute the variable x with -3.


This is how you do it:


  • Given: h(x) = 4x² - 5x
  • Find h(-3) ⇒ substitute x = - 3
  • h(-3) = 4(-3)² - 5(-3) = 4(9) + 15 = 36 + 15 = 51 ← answer (option D.)
You might be interested in
Find the perimeter of the flag in the scale drawling. PLZ HELP I AM CONFUSED
chubhunter [2.5K]
I don't see a photo attached
7 0
3 years ago
If c(x)=5/x-2 and d(x)=x+3, what is the domain of (cd)(x)?
pickupchik [31]

Answer:

The domain is all Real x except x = 2 .

Step-by-step explanation:

(cd)(x) = ( 5 / x-2) * x+3

=  5(x+3)/(x-2)

The domain is all Real x except x = 2 .

(because when x = 2 (cd)(x) is undefined).

3 0
3 years ago
The sum of x and 10 is 5
Jobisdone [24]

Answer:

x=-5

Step-by-step explanation:

This is the sentance turned into an equation: x+10=5

Solved: x+10=5

x=5-10

x=-5

5 0
3 years ago
Please help with this question, I will give the brainliest if correct! The question is in the picture.
Viefleur [7K]

Answer:

Resolved.

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
Chase use 1/6 cup of bananas for every 2/3 cup of apples to make a smoothie. Enter the number of cups of bananas Vhase uses for
Reika [66]

Answer:

1/4 cup of bananas

Step-by-step explanation:

1/6 cup of bananas = 2/3 cup of apples

1/6 cup of bananas = 4/6 cup of apples

1/24 (1/6 ÷ 4 since 4/6 cup of apples is 4 units and we need 1 unit) cup of bananas = 1/6 cup of apples

1 cup of apples = 1/4 (1/24 x 6 for 6 units) cup of bananas

4 0
3 years ago
Other questions:
  • I have no idea how to do Log problems like this. Can anyone help me out?
    10·2 answers
  • explain why an circle would have an infinite number of lines of reflection that would carry the circle into itself?
    12·2 answers
  • What is the probability of rolling 4 even numbers on 4 rolls of a dice
    8·1 answer
  • PLEASE HELP!! WILL MARK BRAINLIEST AND THANK YOU!!<br><br> What is value of x.
    11·1 answer
  • What are some geometric concepts that you can write about a desk? For example the top of the desk is equilateral.
    11·2 answers
  • - 7w - 3(4w + 8) = 11 Solve​
    13·2 answers
  • Convert 7/9 into its decimal form and round to the nearest thousandth
    9·2 answers
  • Earth’s diameter is approximately 12,760,000 meters.
    7·2 answers
  • Lu is graphing the ordered pair (3,5). Starting at the origin, what does she
    14·1 answer
  • What is the area of this trapezoid enter your answer in the box
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!