Answer:
4
Step-by-step explanation:
Yeah if you don't know this one... you're... special.
Two students raced their model cars down a track. The first car traveled
at 40 centimeters per second. The second car traveled at 45 centimeters
per second. If the cars started at the same time, how far apart were the
cars after 3 seconds?
Answer:
Step-by-step explanation:
A researcher believes that about 72%of the seeds planted with the aid of a new chemical fertilizer will germinate. He chooses a random sample of 165 seeds and plants them with the aid of the fertilizer. Assuming his belief to be true, approximate the probability that at most 117of the 165 seeds will germinate. Use the normal approximation to the binomial with a correction for continuity
Answer:
ion know you tell me .?
Step-by-step explanation:
Simplify: −3xy2(2x2y3 + 7xy2 − 5x3y2)
A) −6x3y4 + 21x2y4 + 15x3y4
B) −6x2y5 + 21x2y3 + 15x4y5
C) −6x3y5 − 21x2y4 + 15x4y4
D) −6x2y5 − 21x3y4 + 15x4y4
collect the like terms
Answer is C
Answer:
c
Step-by-step explanation:
f(x)=(x^(2))/(\sqrt(x))+|x-8| whats f(4)
Answer: I think the answer is 20
Answer:
20
20
20
20
Step-by-step explanation:
g(x)=3x^2-5x-9 find g(x+2)
1. The speed of light is 3 x 10^8 meters per second. The sun is approximately 230,000,000,000 meters from Mars. How many seconds does it take for sunlight to reach Mars?
2.If the sun is approximately 1.5 x 10^11 meters from Earth, what is the approximate distance from Earth to Mars? (Note: Use 230,000,000,000 from previous question, which was the sun's distance from Mars.)
Answer:
1. About 760 seconds.
Step-by-step explanation:
Using a calculator, I figured 3 x 10^8 and got 300,000,000. Then, I divided 230,000,000,000 by 300,000,000 to get 759.9 seconds.
Answer:
2. About 80,000,000,000 kilometers. (80 billion.)
Step-by-step explanation:
Again using a calculator, I figured 1.5 x 10^11 and got 150,000,000,000. Then, I subtracted 150,000,000,000 from 230,000,000,000 (230,000,000,000 - 150,000,000,000.) And got an answer of 80 billion.
Answer:
1. 7.6*10^2
2. 8*10^10
Step-by-step explanation:
1. (2.3*10^11)/(3*10^8)
0.76*10^3
The answer above isn’t in boundaries of 1-10 but smaller than 10 so you move it a 10th to the right and now you have to take one exponent away because you did that so you end up with:
7.6*10^2 0r 760 secs
2. (2.3*10^11)-(1.5*10^11)
(2.3-1.5) *10^11
0.8 *10^11
The ‘0.8’ isn’t in boundaries of 1-10 but less than 10 so you move it a 10th to the right which will be 8. Now you gotta do the exponent thing (explained earlier). You should end up with:
8*10^10 or 80 billion
(1) An insurance agency sells various types of insurance policies. 40% of their clients buy auto insurance policies, 30% of their clients buy home insurance policies, and 15% of their clients buy both home and auto insurance policies. a. Compute the probability a randomly selected client buys a home or auto insurance policy.
Answer:
55% or 0.55(as a decimal)
Step-by-step explanation:
40% of their clients buy auto insurance policies = P(A)
30% of their clients buy home insurance policies = P(H)
15% of their clients buy both home and auto insurance policies = P( A ∩ H)
The probability a randomly selected client buys a home or auto insurance policy = P (A ∪ H) is calculated as
P ( A ∪ H) = P(A ) + P ( H ) - P( A ∩ H)
= 40% + 30% - 15 %
= 70% - 15%
= 55%
Therefore, the probability that a randomly selected client buys a home or auto insurance policy is 55% or expressed as decimal = 0.55
About 9% of the population of a large country is hopelessly romantic. If two people are randomly selected, what is the probability both are hopelessly romantic? What is the probability that at least one is hopelessly romantic?
A) The probability that both will be hopelessly romantic is _________. (Round 4 decimal places as needed).
B) The probability that at least one person is hopelessly romantic is _______.
Answer:
A. 0.0081
B. 0.1638
Step-by-step explanation:
From the question, we are told that 9% of the population are hopelessly romantic.
The percentage that are not hopelessly romantic = 100-9 = 91%
The probability of choosing a hopelessly romantic person = 9% = 9/100 = 0.09
The probability of choosing a person who is not hopelessly romantic = 91% = 91/100 = 0.91
Now, we want to select two people and calculate the following probability;
1. Both will be hopelessly romantic
Let’s have the people as A and B
The probability that both will be hopelessly romantic will the the product of being hopelessly romantic probability = 0.09 * 0.09 = 0.0081
b. Probability that at least one person is hopelessly romantic
What this means is that the probability that one of the two ONLY is hopelessly romantic;
We can have two cases here;
Probability (That A is hopelessly while B is not )or Probability (A is not and B is hopeless )
Thus we have :
(0.09 * 0.91) + (0.91 * 0.09) = 0.0819 * 2 = 0.1638
Answer:
0.1719
Step-by-step explanation:
I just took the test and this was the correct answer. Sorry they did not offer an explanation and I still can not figure it out.
Televisions and monitors come in two common aspect ratios, 4:3 and 16:9 (sometimes
16:10 is also used). A 42 inch TV suggests that the main diagonal of the TV is 42 inches.
Determine the dimensions of the screen of a 42 inch TV with a 4:3 aspect ratio.
Answer:
The dimension of the TV = 11.2 inches × 8.4 inches
Step-by-step explanation:
Let x be the length of the TV
Let y be the width of the TV
x : y = 4:3
[tex]\frac{x}{y} = \frac{4}{3} \\cross-multiplying\\3x = 4y \\x = \frac{4}{3} y- - - - - (1)[/tex]
From the figure attached:
using Pythagoras theorem
x² + y² = 42²
where:
[tex]x = \frac{4}{3} y\\(\frac{4}{3}y)^2 + y^2 = 42^2\\\frac{16}{9}y^2 + y^2 = 1764\\ \frac{16y^2}{9} + \frac{y^2}{1} = 1764\\\frac{16y^2 +9y^2}{9}= 1764\\ cross-multiplying\\16y^2 + 9y^2 = 1764\\25y^2 = 1764\\y^2 = \frac{1764}{24}\\y^2 = 70.56\\y = \sqrt{70.56} \\y = 8.4\ inches\\Finding\ x:\\x = \frac{4}{3} y\\x = \frac{4}{3} \times 8.4\\ x = 1.33 \times 8.4\\x = 11.2\ inches\\\therefore\ the\ dimensions\ are\ 11.2\ inches \times 8.4\ inches[/tex]
A researcher has recruited 20 volunteers to participate in a study. The researcher wishes to measure the effect of alcohol on an individual's reaction time. The 20 volunteers are randomly divided into two groups. Group 1 will serve as a control group in which participants drink four 1-ounce cups of a liquied that looks, smells, and tastes like alcohol in 15-minute increments. Group 2 will serve as an experimental group in which participants drink four 1-ounce cups of 80-proof alcohol in 15-minute increments. After drinking the last 1-ounce cup, the participants sit for 20 minutes. After the rest period, the reaction time to a stimulus is measured. This is an example of
Answer: Experimental Research
Step-by-step explanation: Experimental Research is the "classical" method of conducting an experiment to a scientific approach. It is the most rigorous of all research designs. In it, an independent variable is used to determine its influence on a dependable variable. Experimental research's unique quality is that it can link cause and effect through between variables.
This method works better at independent variables which can be manipulated or controled and can be conducted in laboratories or field settings.
There are 3 types of experimental research:
Pre-experimental Research Design: it is the simplest and pratical form. In it, a group or groups are observed by the application of the independent variable and determine the change;Quasi-Experimental Research Design: the participants are not randonly selected, there is a control group and independent variable is manipulated;True Experimental Research Design: it is the most accurate of the types. It uses control group, randomized group of participants, statistical analysis to reject or accept a hypothesis. It is the epitome of the experimental research;Experimental Research is important because it gives the opportunity to test
the hypothesis and developing a solid conclusion.
3(x + 2) = 4(x + 1)
HELP
Answer: x=2
Step-by-step explanation:
Let's solve your equation step-by-step.
3(x+2)=4(x+1)
Step 1: Simplify both sides of the equation.
3(x+2)=4(x+1)
(3)(x)+(3)(2)=(4)(x)+(4)(1)(Distribute)
3x+6=4x+4
Step 2: Subtract 4x from both sides.
3x+6−4x=4x+4−4x
−x+6=4
Step 3: Subtract 6 from both sides.
−x+6−6=4−6
−x=−2
Step 4: Divide both sides by -1.
−x −1 = −2 −1
Answer
x=2
Solve each equation.
5x-4=4x
Steps to solve:
5x - 4 = 4x
~Subtract 5x to both sides
-4 = -x
~Divide -1 to both sides
4 = x
Best of Luck!
Answer:
[tex] \boxed{ \bold{ \huge{ \boxed{ \sf{x = 4}}}}}[/tex]
Step-by-step explanation:
[tex] \sf{5x - 4 = 4x}[/tex]
Move 4x to left hand side and change it's sign
Similarly, move 4 to right hand side and change it's sign
[tex] \longrightarrow{ \sf{5x - 4x = 4}}[/tex]
Collect like terms
[tex] \longrightarrow{ \sf{x = 4}}[/tex]
Hope I helped!
Best regards! :D
Simplify the expression: –3(n − 5
Hey there! I'm happy to help!
We want to multiply n-5 by -3. So, we multiply each term of n-5 by -3.
-3(n)=-3n
-3(-5)=15
So, our final expression is -3n+15.
Have a wonderful day! :D
Steps to solve:
-3(n - 5)
~Distribute
-3n + 15
Best of Luck!
Write the augmented matrix for each system of equations.
7x-9y+ 3z = 6
- 2x - 6y + 10z = 3
-3x - 5y + 5z = -1
Answer:
The answer is 100% B
Step-by-step explanation:
I took the test
Please help please please please
Answer:
10/12
Step-by-step explanation:
All other answers can be simplified to 3/5.
A submarine is 42 feet below the surface of the water a shark directly above the submarine is 19 feet below the surface of the water how many feet above the submarine is the shark
Answer: 23 feet above the submarine
Step-by-step explanation:42-19=23 the shark is 23 feet above the submarine.
PLEASE HELP! will give points, no step by step needed
An auto dealership is advertising that the cost of leasing a new car is $450 per month with a $1,500 down payment. The equation used to find c, the total cost of the lease, is c = 450m + 1500, where m is the number of months the car is leased. What is the cost, in dollars, of leasing a car for 32 months?
Answer:
the total cost would be $15,900
2 lines intersect. A line with points A, B, D intersects a line with points E, B, C at point B, forming 4 angles. In the diagram, which angles are vertical angles? Select two options. AngleABE and AngleABC AngleABE and AngleCBD AngleABE and AngleEBD AngleABC and AngleEBD AngleABC and AngleCBD
Answer:
Its B and D
Step-by-step explanation:
The angles that are vertical angles <EBD and<ABC and then <ABE and <CBD
Vertical anglesVertical angles are angles that meets at a point of intersection of two lines. They ac opposite to each other at the point of intersection X.
According to the given figure, we can see that the two angles that are vertically opposite are <EBD and<ABC and then <ABE and <CBD
Learn more on vertical angles here: https://brainly.com/question/14362353
#SPJ9
the midpoint of GH is M(4,-3) One endpoint is G(2,-2) find the coordinates of endpoint H
please help
Answer:
(6,-4)
Step-by-step explanation:
Midpoint = (x1+x2)÷2 , (y1+y2)÷ 2
Sub the values in,
(4,-3) = (2+X)÷2 , (-2+Y)÷2
Therefore cordinates of H is (6,-4)
What are the first five sequences to the equation f(1)=2/3,f(n)=f(n-1)x3/2
Answer:
2/3,1,3/2,9/4,27/8
Step-by-step explanation:
f(1)=2/3
f(n)=f(n-1)×3/2
f(2)=f(2-1)×3/2=f(1)×3/2=2/3×3/2=1
f(3)=f(3-1)×3/2=f(2)×3/2=1×3/2=3/2
f(4)=f(4-1)×3/2=f(3)×3/2=3/2×3/2=9/4
f(5)=f(5-1)×3/2=f(4)×3/2=9/4×3/2=27/8
Find the overall score for the student with the following weighted system and average
scores. Round to the tenth.
Weight Grade
Tests
55% 78.5
Homework
25% 80
Take home quizzes
15% 72
Participation
5% 50
Answer: 76.475
Step-by-step explanation:
___________weight(%) ___Grade
Tests _______55% ______78.5
Homework __25% ______ 80
Th quizzes__15% _______72
Participation_5% _______50
Overall score = Σ (weight% × grade)
Hence,
(55% * 78.5) + (25% * 80) + ( 15% * 72) + (5% * 50)
43. 175 + 20 + 10.8 + 2.5
= 76.475
Hence, overall score = 76.475
Identify the range of the graphed function
Answer: The first Option.
Step-by-step explanation:
y is greater than -1 and y is less than or equal to 4.
The range of the function will be Range = {y | 0 < x ≤ 6}. Then the correct option is C.
What is a function?A statement, principle, or policy that creates the link between two variables is known as a function. Functions are found all across mathematics and are required for the creation of complex relationships.
The domain means all the possible values of x and the range means all the possible values of y.
The domain of the function is (-1, 4] and the range of the function will be
Range = {y | 0 < x ≤ 6}
Then the correct option is C.
More about the function link is given below.
https://brainly.com/question/5245372
#SPJ2
True or False A-B = B-A
Answer:
False
Step-by-step explanation:
Let's say A is 1 and B is 12.
For the first part 1 - 12= -11 and the second part 12 - 1 = 11.
-11 and 11 are not equal.
Hopefully that helps and have a great day!
what is the answer to 9x – 20 + x2
Answer:
it is simplified as much as it possibly can be because there are no like terms. x squared is not the same variable as x.
An automated call machine can handle
8.86 minutes of calls before it sends a
report. How many reports would ft send
for 53.16 minutes of calls?
A. 0.06 report
C. 6 reports
D. 60 reports
B. 0.6 report
Need ASAP
When viewed from the front, the rope used to tie down a tent forms a pair of supplementary angles with the ground. Find m abc
Supplementary angles are angles that add up to 180 degrees.
180 = 3x + 4 + 8x + 11
Combine like terms.
180 = 11x + 15
Subtract 15 from both sides.
165 = 11x
Divide both sides by 11
15 = x
m<ABC = 3x + 4 = 3(15) + 4 = 45 + 4 = 49 degrees.
Multiply 4.8 × 126.7.
Answer:
608.16
Step-by-step explanation:
Answer:608.16
Step-by-step explanation:
4.8 x 126.7
(6.7 x 10⁴)(2.9 x 10⁵)
Answer:
1.943*10^10
Step-by-step explanation:
6.7 times 2.9 = 19.43
You then will have to add the exponents which gives 10^9 but we can move the decimal place of 19.43 to the left 1.943. Add one to the exponent which then will be 10^10
Pls help ASAPPP I mark BRAINIEST
Answer:
The missing number is 5
Step-by-step explanation:
Let x be the number
Plug x in: [tex]\frac{5}{7} = \frac{1}{7}x[/tex] Divide each side by 1/7 to cancel out the 1/7 next to x. It should now look like this: 5 = xI hope this helps!
(5,2), (-4,-3)
Help me ASAP
Answer:
its a fraction -5 on top and -9 on the bottom
Step-by-step explanation:
-3-2
-4-5
