## Forum Replies Created

Viewing 11 posts - 1 through 11 (of 11 total)
• Author
Posts
• in reply to: Inverse of y = 9x^2 – 4? #10294
shilpav
Participant

Answer: y = ± [ √(x+4) ] / 3

Solution:

1) To find the inverse of the function y = 9x2 – 4, exchange the variables x and y, and then solve for the new y.

2) Exchange of the variables: y = 9x2 – 4 → x = 9y2 – 4

3) Solve for y:
=> 9y2 = x + 4
=> y2 = [x + 4] / 9
=> y = ± [ √(x + 4) ] / 3

• This reply was modified 2 years, 10 months ago by ProtonsTalk.
• This reply was modified 2 years, 10 months ago by ProtonsTalk.
#10312
shilpav
Participant

D. P(z<-a) + P(-a<z<a) + P(Z>a)

Explanation:
This expression represents all of the possible values in a curve, or in other words, the total area of a curve. According to a standard normal distribution, the total area of a curve is always equal to 1 as it is a probabilistic distribution.

• This reply was modified 2 years, 10 months ago by ProtonsTalk.
• This reply was modified 2 years, 10 months ago by ProtonsTalk.
#10318
shilpav
Participant

Answer: The graph of y=mx2-5x-2 has no x-intercepts for m<-25/8

Solution:
y=mx2-5x-2

To get x-intercepts, y must be zero:
=> y=0
=> mx2-5x-2=0

We can solve this equation using the quadratic formula:
ax2+bx+c=0; a=m, b=-5, c=-2

=> x = [-b ± sqrt( b2 – 4ac) ] / (2a)
=> x = [-(-5) ± sqrt( (-5)2 – 4(m)(-2) )] / (2(m))
=> x = [5 ± sqrt(25 + 8m)] / (2m)

This equation doesn’t have a solution (no x-intercepts) if:
25 + 8m < 0
=> 8m < -25
=> m < -25/8

Hence, The graph of y=mx2-5x-2 has no x-intercepts for m < -25/8

• This reply was modified 2 years, 10 months ago by ProtonsTalk.
• This reply was modified 2 years, 8 months ago by ProtonsTalk.
#10303
shilpav
Participant

Cathode: H+, Ag+
Anode: F, OH

Cathode Reaction: Ag+ (aq) + e →Ag (s)
Anode Reaction: 4OH(aq) – 4e → 2H2O (l)+O2 (g)

Thus, the product at the anode is oxygen gas and at the cathode electrode is silver metal.

• This reply was modified 2 years, 10 months ago by ProtonsTalk.
• This reply was modified 2 years ago by ProtonsTalk. Reason: schema issue
#10328
shilpav
Participant

The vertex form of a parabolic function has the general formula:

f(x) = a(x-h)^2 + k where (h,k) represent the vertex of the parabola.

Therefore, to write the given equation in vertex form, we will need to transform it to the above formula as follows:

y = 9x^2 + 9x – 1

y = 9(x^2 + x) – 1

y = 9(x^2 + x + 1/4 – 1/4)-1

y = 9((x+1/2)^2 – 1/4)-1

y = 9(x + 1/2)^2 – 9/4 – 1

y = 9(x + 1/2)^2 – 13/4 ————-> The equation in vertex form

If you need the vertex of the parabola, it will simply be (-1/2, -13/4)

• This reply was modified 2 years, 10 months ago by ProtonsTalk.
#10334
shilpav
Participant

The correct answer is: C. increase in the rate of skin cancer.

• This reply was modified 2 years, 11 months ago by ProtonsTalk.
#10240
shilpav
Participant

C) the mind and behavior

Explanation:
Psychology is related to the understanding that is gained from the researches and study about mind and behavior. The study is based on studying the feelings, thinking, and action taken by an individual. They also research the factors responsible for manipulating or impacting the behavior and thinking of an individual and the related facts.

• This reply was modified 2 years, 10 months ago by ProtonsTalk.
• This reply was modified 2 years, 8 months ago by ProtonsTalk.
in reply to: NaOH (aq) + FeBr3 (aq)→ #10261
shilpav
Participant

Chemical Equation:
3NaOH (aq) + FeBr3 (aq)→3NaBr (aq) + Fe(OH)3 (s)

• This reply was modified 2 years, 10 months ago by ProtonsTalk.
#10273
shilpav
Participant

(d) The cell has a great metabolic demand

Explanation:
If we see a large number of mitochondria in a cell, we can infer that the cell has a great metabolic demand. A high metabolic demand means that the cell requires a large amount of energy released in the process called cellular respiration. The mitochondria are where most of the energy of the cell is made.

• This reply was modified 2 years, 10 months ago by ProtonsTalk.
• This reply was modified 2 years, 10 months ago by ProtonsTalk.
#10325
shilpav
Participant

Na2CO3 (aq) + 2 AgNO3 (aq) → Ag2CO3 (s) + 2 NaNO3 (aq)

This is a precipitation reaction: Ag2CO3 is the formed precipitate.

• This reply was modified 2 years, 10 months ago by ProtonsTalk.
• This reply was modified 2 years, 10 months ago by ProtonsTalk.
• This reply was modified 2 years, 10 months ago by ProtonsTalk.
#10331
shilpav
Participant

Law of Segregation: It states that every organism consist of two alleles for each trait, and these alleles segregate by the process of meiosis. So, each gamete consists of one allele from one parent.

• This reply was modified 2 years, 11 months ago by ProtonsTalk.
Viewing 11 posts - 1 through 11 (of 11 total)
Scroll to Top
Scroll to Top