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
Ratling [72]
3 years ago
13

Which of the following would be the best first step when solving the following system using the substitution method?

Mathematics
1 answer:
Brilliant_brown [7]3 years ago
7 0
A that a that is your answer iu hoped it helped you and its right
You might be interested in
3x - 4/5 = 7/12 help me with this question
nlexa [21]

Answer:

Stephanie I am a rider provier the morning sir please

5 0
3 years ago
Read 2 more answers
An arc subtends an angle of 72 degree at the circumference of a circle of radius 5 cm. calculate the length of the arc in terms
Irina-Kira [14]

Hope you understand the solution. Call my attention if you need any help

4 0
3 years ago
An article reported that what airline passengers like to do most on long flights is rest or sleep; in a survey of 3697 passenger
slava [35]

Answer:

Step-by-step explanation:

Hello!

The study variable is:

X: number of passengers that rest or sleep during a flight.

The sample taken is n=9 passengers and the probability of success, that is finding a passenger that either rested or sept during the flight, is p=0.80.

I'll use the binomial tables to calculate each probability, these tables give the values of accumulated probability: P(X≤x)

a. P(6)= P(X=6)

To reach the value of selecting exactly 6 passengers you have to look for the probability accumulated until 6 and subtract the probability accumulated until the previous integer:

P(X=6)= P(X≤6)-P(X≤5)= 0.2618-0.0856= 0.1762

b. P(9)= P(X=9)

To know the probability of selecting exactly 9 passengers that either rested or slept you have to do the following:

P(X≤9) - P(X≤8)= 1 - 0.8657= 0.1343

c. P(X≥6)

To know what percentage of the probability distribution is above six, you have to subtract from the total probability -1- the cumulated probability until 6 but without including it:

P(X≥6)= 1 - P(X<6)= 1 - P(X≤5)= 1 - 0.0856= 0.9144

I hope it helps!

6 0
3 years ago
2.<br> Which of the functions below is an inverse of the quadratic function f(x) = x2 - 3 ?
mezya [45]

Answer:

the inverse of the quadratic function f(x) = x^2 - 3  is \mathbf{f^{-1}(x)=\pm \sqrt{x+3}}

Step-by-step explanation:

We need to find inverse of the quadratic function f(x) = x^2 - 3

Let

y=x^2-3

Replace x and y

x=y^2-3

Now, we will solve for y

Adding 3 on both sides

x+3=y^2-3+3

x+3=y^2

Taking square root on both sides

\sqrt{y^2}=\sqrt{x+3}\\y=\pm \sqrt{x+3}

Now replace y with f^{-1}(x)

f^{-1}(x)=\pm \sqrt{x+3}

So, the inverse of the quadratic function f(x) = x^2 - 3  is \mathbf{f^{-1}(x)=\pm \sqrt{x+3}}

3 0
3 years ago
There are 150 calories in a cup of whole milk and only 80 in a cup of skim milk. In switching to skim milk, find the percent dec
ss7ja [257]

Answer:

53.3%

Step-by-step explanation:

80/150=160/300

160/300=53.33/100

The decrease in calories is 53.3%

5 0
3 years ago
Other questions:
  • Please explain your answer. Thank you!
    7·1 answer
  • 20 divided by 4 - 5+12
    15·2 answers
  • The angle
    11·1 answer
  • The green line below____. Check all that apply. I need help plz
    10·1 answer
  • 12x+40=15x+25 solve for x
    5·2 answers
  • Solve the inequality: x^2 ·(x +9)·(x −5)≥0
    8·2 answers
  • Please answer the question above
    6·1 answer
  • x P(x) 0 0.25 1 0.3 2 0.1 3 0.35 Find the standard deviation of this probability distribution. Give your answer to at least 2 de
    9·1 answer
  • Keiko bought 2 CDs that were each the same price. Including sales tax,she paid a total of $34.20. Of that total, $1.80 was tax.
    12·1 answer
  • X - y = 4
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!