Is the equation 5x = 7x always, sometimes, or never true? Explain.
Answer:
Step-by-step explanation:
If x = 0, 5x = 7x is true.
If x = 1, 5x ≠ 7x
5x = 7x is sometimes true.
Please help, ill give brainiest
A penny is dropped from the top of a new
building. Its height in feet can be modeled by
the equation y = 256 − 16x2, where x is the
time in seconds since the penny was dropped.
How long does it take for the penny to reach
the ground?
Answer:
4? I could be wrong. Sorry.
Step-by-step explanation:
Please help marking brainliest for correct answer
Answer:
alternate exterior
Step-by-step explanation:
10^(x-2)=1000 Show or explain your reasoning.
Answer: x=5 trust me it right
Step-by-step explanation: hope this help:D
I don’t have time to explain bc I have work to do.
a circle with the diameter of 40 inches. what is the area?
Answer:
A= 1256
Step-by-step explanation:
The formula for area of a circle is [tex]A=\pi r^{2}[/tex]
1. Diameter is DOUBLE of radius, so the diameter must be divided by 2. 40/2 = 20.
2. Then, plug in the values into the area formula. A= 3.14[tex](20^{2})[/tex]
3. Solve. A= 1256. (Remember that 20 squared is 20x20)
I need help with graphing
Ok I can help you with graphing
Match the event with the most appropriate probability word: The roll
a standard fair dice will show the square root of 49.
Impossible
Unlikely
Certain
Evens
Likely
Other:
Answer:
Impossible
Step-by-step explanation:
Impossible is the answer as the root of 49 is 7 and dice has numbers up till six only
ples ill give you the brianliest
Answer:
72
Step-by-step explanation:
step 1: 10(4+14/7)+12
step 2: 10(4+2)+12
step 3: 10(6)+12
step 4: 60+12=72
Tripp swims 50 laps a day in
hopes of becoming a collegiate
swimmer. Write an equation to
represent y, the total number of
laps Tripp has swam after x
days.
Answer:
y = 50x
Step-by-step explanation:
Convert the following angle from degrees to radians. Express your answer in simplest form. 210°
Answer:
Step-by-step explanation:
[tex]\frac{rad}{\theta}=\frac{\pi}{180}\\ \\ rad=\frac{\theta \pi}{180}\\ \\ rad=\frac{210\pi}{180}\\ \\ rad=\frac{7\pi}{6}[/tex]
A total of 560 tickets were sold
They were either adult or Student
tickets.
The number of Student tickets
Sold was 3 times the number of
adult tickets. How many adult
tickets sold
Answer:
Student.... 420
Adult.......140
To test the effectiveness of an exercise program in reducing high blood pressure, 15 participants had their blood pressures recorded before beginning the program and again after completing the program. The difference (after minus before) in blood pressure was recorded for each participant, and the sample mean difference was calculated. A hypothesis test will be conducted to investigate whether there is convincing statistical evidence for a reduction in blood pressure for all who complete the program. Which of the following is the correct set of hypotheses?
A. H0 : bar xD = 0
Ha : bar xD is not equal to 0
B. H0 : bar xD = 0
Ha : bar xD > 0
C. H0 : mu D = 0
Ha : mu D is not equal to 0
D. H0 : mu D = 0
Ha : mu D > 0
E. H0 : mu D = 0
Ha : mu d < 0
Answer:
E.
H0 : mu D = 0
Ha : mu d < 0
Step-by-step explanation:
The hypothesis is to test if there is a reduction in blood pressure for those who complete the program, this means if the mean difference in blood pressure (that is after - before) is less than 0. Here, the hypothesis is the alternative side while the opposite, that is, there is no difference in blood pressure before and after is the null.
This means :
H0 : μD = 0
Ha : μD < 0
You can use the definitions for null and alternate hypotheses
The correct set of hypothesis is given by:
Option E. [tex]H_0: \mu_D = 0[/tex]
[tex]H_a: \mu_D < 0[/tex]
How to form the hypotheses?There are two hypotheses. First one is called null hypothesis and it is chosen such that it predicts nullity or no change in a thing. It is usually the hypothesis against which we do the test. The hypothesis which we put against null hypothesis is alternate hypothesis.
Null hypothesis is the one which researchers try to disprove.
How to find the correct set of hypothesis for the given situation?Since the test is to test the effectiveness of the exercise program, thus the wish of the tester is to get the result that effectiveness is there. This will be the alternate hypothesis and the null hypothesis will be that there is no difference in the blood pressure before and after the exercise. Thus, we will test against the null hypothesis.
Since the evidence is to be found for all of the people who completed the program, thus it is hypothesis about population perimeter. The average blood pressure difference of the population is denoted by [tex]\mu_D[/tex] and that of the sample is denoted by [tex]\overline{x}_D[/tex]
Thus, we have:
Null hypothesis = the difference in average blood pressure before and after the program of the population is not changed(thus 0 is the difference) = [tex]H_0: \mu_D = 0[/tex]
Alternate hypothesis = the difference in average blood pressure is reduced(since the test is for seeing if the blood pressure is reduced or not) = [tex]H_a: \mu_D < 0[/tex]
Thus,
The correct set of hypothesis is given by:
Option E. [tex]H_0: \mu_D = 0[/tex]
[tex]H_a: \mu_D < 0[/tex]
Learn more about null and alternative hypothesis here:
https://brainly.com/question/18831983
Help meeee pleaseeeeeeee I need to pass my homework
First, you replace c and d. You would end up with[tex]\frac{1}{4}[/tex] (6) + 3(7).
Then, you evaulate it. You end up with [tex]1\frac{1}{2}[/tex] + 21.
Lastly, you add them together. The final answer is [tex]22\frac{1}{2}[/tex].
Hi there!
Simplifly c and d:
c=6, d=7
Multiply terms by terms:
[tex]\frac{1}{4}[/tex]·[tex]6=1\frac{2}{4}[/tex]
[tex]3[/tex]·[tex]7=21[/tex]
Add all terms together:
[tex]1\frac{2}{4}+21=22\frac{2}{4}[/tex]
Simplifly terms:
[tex]22\frac{2}{4}=22\frac{1}{2}[/tex]
Final Result: [tex]22\frac{1}{2}[/tex]
5. A length of rope is 20m long. If I cut it into 10 equal length pieces, how long is
each piece? *
what is given
Answer:
each piece is = 3 m long
Step-by-step explanation:
20 /10= 2
What is the fraction form of Sin 50° ÷ Sin 30°
Answer:
my insta is _luhbhabie_
Step-by-step explanation:
help please!!!!!!!!will give brainliest
Step-by-step explanation:
The first answer is correct
Answer:
The answer is option A = 5 11/36
Working :
3 8/9 as an improper fraction = 35/9
1 5/12 as an improper fraction =17/12
35/9 + 17/12 = 191/36
=5 11/36
Please mark me brainliest.
what is the system of linear equation by graphing? 2x + 3y=16.9
5x=y + 7.4
Answer:
6366336363721.0122112222%
Hello, I need help!!!!?
Olivia is making scarves. Each scarf will have 3 rectangle, and 2/3 of the rectangles will be purple. How many purple rectangles she need for 2 scarves.
Answer:
she will use 4.
Step-by-step explanation:
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The difference of four times a number and seven is 21. Find the number.
Answer:
7
Step-by-step explanation:
4x-7=21
4x=28
x=7.....
The number is 7.
We have a sentence - "The difference of four times a number and seven is 21".
We have to find the number.
Express the statement - "The difference of 40 and 20 is equal to n" in the form of expression.The expression representing the above statement is -
n = 40 - 20 = 20
According to the question, we have -
The difference of four times a number and seven is 21.
Assume the number be x.
Therefore -
4x - 7 = 21
4x = 28
x = 7
Hence, the number is 7.
To solve more questions on Rearranging expressions, visit the link below-
brainly.com/question/8864600
#SPJ2
Faucet A can fill up a water cooler in 8 minutes. Faucet B can fill the same water cooler in 12 minutes. How long will it take both faucets together to fill the water cooler?
!!!!!Explanation Needed!!!!!
Answer:
A cold water tap takes 3 minutes to fill the bath. A hot water tap takes 2 minutes to fill the bath. How long does it take to fill the bath when both taps are open at the same time?
It is easiest just to let the bath be a given size.
My little bath will be 12 litres
cold water 4L/min hot water = 6L/min
together 10L/1 min
10*(12/10) L per 1*(12/10) minutes
12L per 1.2min
12L per 1min and 12sec
It will take 1 minute and 12 seconds to fill the bath.
Step-by-step explanation:
Answer:
It will take 5 minutes for both faucets together to fill the water cooler
Step-by-step explanation:
I'm kinda just guessing but I do have a reasonable explanation
So the average time it takes for the faucets INDIVIDUALLY to fill the water cooler is 10 minutes
But since both faucets are filling them TOGETHER, it should take half the time
And half of 10 is 5
So it should take 5 minutes for both faucets together to fill the water cooler
If that makes sense
5y+3y????????????????????
Answer:
8y
Step-by-step explanation:
It's really simple! Because both of the variables are the same, You can just add it!
Hope this helps ^^
Reina enjoys dinner at a restaurant in Alhambra where the sales tax on meals is 10%. She left a 20% tip on the price of her meal before the sales tax was added. The meal was $22. How much should she give for tip? Show your work or explain your solution.$2.20
$4.40
10%
$6.60
Answer:
Step-by-step explanation:
Your answer
Meal is 22$
10% tax, tax with price = 24.2$
She gave on tip = 4.84$
Total price = 29.04$
Mark it as Brainlist answer. Follow me.
Keith has saved 12 quarters from washing cars how many cents does Keith have
Answer:300
Step-by-step explanation:25 cents each quarter so the equation would be 12 times 25.
Answer: 300 cents
Step-by-step explanation: 12 quarters saved, 1 quarter = 25 cents, 12 x 25 = 300
e/2 < -1 I need help!!! Ty
Answer: you cant solve this solution
Step-by-step explanation:
7. Mrs. Dyson asked her students to draw a figure with a perimeter of 4x+4.
Shown below are 4 drawings made by her students. (They are not drawn to
scale.) Which one is NOT correct? *
Answer:
the answer is b
Step-by-step explanation:
Which angles are complementary to each other?
5
25 and 23
25 and 24
21 and 22
21 and 24
What would be the y- intercept for the function y=3x-6?
Answer:
the y intercept would be at (0,-6)
what is the anwser pls help
Answer:
b. 0.09
Step-by-step explanation:
0.09 is the only one smaller than 0.59
0.59>0.09
Answer:Its D
Step-by-step explanation:
Of the people who fished at Clearwater Park today, 81 had a fishing license, and 9 did not. Of the people who fished at Mountain View Park today, 60 had a license, and 40 did not. (No one fished at both parks.) Suppose that one fisher from each park is chosen at random. What is the probability that the fisher chosen from Clearwater had a license and the fisher chosen from Mountain View did not have a license? Do not round your answer.
Answer:
9/25 = the probability that the fisher chosen from Clearwater had a license and the fisher chosen from Mountain View did not have a license
Step-by-step explanation:
There are 90 fishers at Clearwater and 100 fishers at Mountain View
The probability of a fisher at Clearwater had a license = 81/90 = 9/10
and the probability of a fisher at Mountain View
did not have a license = 40/100 = 2/5
the probability that the fisher chosen from Clearwater had a license and the fisher chosen from Mountain View did not have a license = 9/10(2/5) = 9/25
