Answer:
10/7 - 2/7= 5 1/7
Step-by-step explanation:
it 5 1./7
What happens to a 44-degree angle if you rotate it 90 degrees counterclockwise? Explain your answer.
Answer:
it would melt
Step-by-step explanation:
at 40 degrees, the angle will stay in its natural shape. if increased to 90 degrees on the counter, and with the wisdom of mr. clock, the angle will start to warp, and lose its shape. evidently, if the angle is heated at a steady 90 degrees, the melting process will occur, and it will make a mess on your counter. thats why, when melting angles, I recommend putting it in a container, so as to not make too big of a mess.
a triangle has angles that measure 64 degrees and 55 degrees what is the measure of the third angle
Answer:
61
Step-by-step explanation:
the angles of any triangle combined equal 180 therefore take the known angles and subtract them from 180 getting 61
Need help plz and thank u
Answer:
20%
Step-by-step explanation:
12/60 (divided) makes 0.2, converted to a percent is 20%
What is the length of the hypotenuse? Make sure you include measurements.
Answer:
90
Step-by-step explanation:
60+30 is 90
I cant find my calculator, what's 37*15?!?
Step-by-step explanation:
i hope you find tou calculator but the answer is 555
40.54
☞EXPLANATION☜Percentage Calculator: 15 is what percent of 37? = 40.54.
The following data are the daily number of minutes of smartphone use for a random sample of 8 students at your institution: 117, 156, 89, 72, 116, 125, 101, 100.
(a) Test the null hypothesis according to which the true mean is 100 min against the alternative that it is different than 100. Use a significance level of 5% (state the null and the alternative hypothesis, the test statistic and the conclusion). (10 points)
(b) Compute a 95% confidence interval for the true mean number of minutes per day a student uses his or her smartphone. Is your finding consistent with your answer in (a) (Explain why or why not)?
Step-by-step explanation:
Number of students = 8
Mean of sample = 876/8
= 109.5
We solve for standard deviation using formula:
S = √(Xi -barX)/n-1
S = 25.3264
A.
H0: u = 100
H1: u not equal to 100
T test = barX - u/s/√n
t = 109.5-100/(25.3264/√8)
= 9.5/8.9542
= 1.0609
Df = 8-1 = 7
P value = 0.953141 at 5% significance level. P-value > 0.05 so we fail to reject H0
Conclusion: insufficient evidence that mean = 100
B.
95% = bar x +-t*s/√n
t = 2.365 at 95% and df = 7
109.5 +- 2.365(25.3264/√8)
= 109.5 +- 2.365(8.9542)
= 109.5-21.1768, 109.5+21.1768
= (88.3232, 130.6768)
In conclusion true mean is in the confidence interval, so it is consistent.
When Lila conducted an experiment on citywide pond water, all of her samples came from the pond in her uncle's backyard. Explain her error.
Her area of study is too narrow. There are other sources of water in the city that she is not considering. So her sample is too biased leaning toward the Uncle's pond water, and that leaves out every other source. We say that the Uncle's source of water is over-represented while the other sources are completely under-represented.
Let's put it this way: We have a hypothetical city that has 100 acres of pond water either in or surrounding the city limits. If the Uncle's pond only represents 1% of this, then she's ignoring the other 99% of the ponds.
What Lila needs to do to to fix this error is to draw up a map of each major pond and mark those ponds with numbers 001,002,...998,999. In this example, there are 999 ponds. Then she needs to either use a random number table or computer software to help randomly generate values to help select the ponds. Doing so will ensure that she spans a good portion of the city and not stay focused on just the narrow area of her Uncle's backyard.
The reason why she needs to enlarge her area of study is because the results of her Uncle's pond study may lead to the wrong conclusion of the city overall. Let's say his pond is contaminated somehow, and it's only his pond that's the unfortunate one. She would likely see the pond is contaminated and conclude that the whole city's water is ruined as well, which isn't the case. Or we could have nearly the entire city's pond water in trouble, but her Uncle's pond is one of the lucky ponds not to get contaminated. We can see that Lila would likely conclude that no action needs to be taken to clean up the city's water sources, which is also not the case.
If Lila only cared about her Uncle's pond, then that pond (and perhaps immediate close surrounding area) would be her population of study. However, her study is about citywide pond water which is why she needs to extend to other places in the city or in the outer surrounding areas.
An electronics store is having a 15% off sale. Suppose the sale price(p) of a laptop is $495. Which statement are true for this stuation
A. P+ 0.15p represents the sales price
B. P- 0.15p represent the sales price
C. 0.85p represents the sales price
D. The sale price is 420.75
E. The sale price is 569.25
Answer:
The answer to the Question is D
Answer:
B, C, D
Step-by-step explanation:
If the sales price is 15% off, then the the price is .85(100-15%) of the price so c is true
this also makes b true. (100-15%) is p-.15
495 x .85 (100-15%)=420.75 so d is true
find the variable h+ 1/2 = 3 1/4
Answer:
h=2 3/4
Step-by-step explanation:
2 3/4+1/2=
you can convert 1/2 into 2/4 so they have like denominators
2 3/4+2/4= 2 5/4 which is also equal to 3 1/4
The weight of a dolphin increased by 17% when it became pregnant. What is the approximate pregnant weight of the dolphin if it was 278 lbs. before it became pregnant? Round to the nearest tenth of a pound.
Answer:
230.74
Step-by-step explanation:
Plss help I’ll give Brainliest it help immediately
Answer:
3.61
Step-by-step explanation:
identify the coefficeient following expression
6a+7
Answer:
6
Step-by-step explanation:
The coeffecient is the number next to the variable. Boom. Done.
Answer:
6
Step-by-step explanation:
a coefficient is a number in front (behind) the variable (ex. the coefficient in 2x is 2, and the variable is x)
i hope this helps :)
Emily has 437 pennies in a
piggy bank. Round the number
of pennies Emily has to the
nearest ten.
Answer:
437 to the nearest ten is 440, hope this helps
I aould appreciate if someone helped
I WILL GIVE BRAINIEST IF ANSWERED WITH EXPLANATION ASAP
Answer: 9 inches.
Step-by-step explanation:
Use a proportion for this problem
2/3=6/x
Cross multiply
2x=18
Simplify
x=9
Answer:
9
Step-by-step explanation:
you find the scale factor by using the new shapes number which would be 3 and its corresponding value from the old shape which would be 2
3/2 is equal to 1.5 so thats the scale factor ud need to use
6*1.5 is 9 so thats the answer
please help i will give extra points
Answer: 1
Step-by-step explanation:
4b-5a
4(4)-5(3)
16-5(3)
16-15
1
Answer:
1
Step-by-step explanation:
4 x 4 - 5 x 3
16 - 15 = 1
How many joules of gravitational potential energy are stored in an object that has a mass of 8.5 kilograms and is held 2 meters above the surface of earth?
Answer:
I believe the answer is 166.6 Joules or (if rounding to the nearest whole number) 167 Joules.
Step-by-step explanation:
Here is the formula to find the gravitational potential energy of an object:
U = m * g * h (potential energy equals mass times gravitational acceleration * the height)
The mass is 8.5 kilograms, the height is 2 meters, and Earth's gravitational acceleration is always, no matter the other values or earthly situations, 9.8 m/s.
Now we solve:
8.5 * 9.8 * 2 = 166.6 which is rounded to 167 Joules.
Evaluate the formula for B = 9 in.2 and h = 32 in.
32 in.3
9.6 in.3
96 in.3
288 in.3
Answer:
is going to give you a decimal as then you divide it by 2 and then multiply that number by 4 hope this helps
Step-by-step explanation:
Answer:
is going to give you a decimal as then you divide it by 2 and then multiply that number by 4 hope this helps
Step-by-step explanation:
How is math used in making murals?(subject:Collage and Career readiness)
The 20,000 seats available at Madison Square Garden for a popular concert sold out in just 12
minutes. If the tickets sold at a constant rate, how many tickets sold in 5 minutes (min)? Round
the answer to the nearest whole number.
Answer:
8333 tickets.
Step-by-step explanation:
If you take 20,000 and divide it by 12 you get 1666.66
You then take 1666.66 and times it by 5.
The answer you get is 8333.33 but the instructions say to round it to the nearest whole number which would be 8333. Hope this helps!!
simplify 45÷3+2×8-12+43
Answer:
62
Step-by-step explanation:
divide, then multiply, then calculate the sum or difference and you should get 62
Answer:
Many ways
Step-by-step explanation:
One of them being:
1. 15 + 16 -12 +43
Answer is 62 if wondering
(Brainliet?)
First, divide 45 by 3 which is 15
Then, multiply 2 and 8 which is 16
Add 15 and 16 which is 31
Subtract 12 and get 19
Add 43 adn get 62
A triangle has an area of 48 square feet. The height of the triangle is 8 ft. What is the length of the base of the triangle?
Answer:
12 square feet
Step-by-step explanation:
A=Area
b=Base
h=Height
To find the area of an triangle, you use the formula A=1/2bh
you plug in the the area and the height to get:
48=1/2xbx8
you do the maths and you get
b=12
1Answer:
12 sqft
Step-by-step explanation:
34+35? :)))) answer immediately
Answer:
69
Step-by-step explanation:
30+30=60
4+5=9
60+9=69!
help w all please!!! i dont even know where to plot lol
Write 8 1/5 as a fraction
Answer:
8.2
Step-by-step explanation:
let me know if its wrong
PLEASE HELP I AM GIVING BRAINLIEST FOR BEST ANSWER!!!!
Answer:
Im pretty sure its E and C
Step-by-step explanation:
There may be one more:)
Answer:
A D F
Step-by-step explanation:
A: x-3=0
+3 +3
x=3
D: 6= 2x
6/2 =2x/2
3=x
F: x^2 =9
[tex]\sqrt{[/tex]x^2 =[tex]\sqrt{9[/tex]
x=3
I need help sooo please HELP ME :’) ill give good points because its my last question:
When is the multiplicative relationship used? Select all that apply.
options (more than 1):
1.When multiplying the same amount to an x-value.
2.When subtracting the same amount to an x-value.
3.When dividing the same amount to an x-value.
4.When adding the same amount to an x-value.
Answer:
1 and 3
Step-by-step explanation:
ramon makes a spinner with 4 colors. he colors 25% of the spinner red, 15% blue, 40% orange, and the rest green. ramon then spins the spinner. which outcome would be most likely to happen?
a. the spinner landing on green or red
b. the spinner landing on green or blue
c. the spinner landing on orange or red
d. the spinner landing on orange or blue
Answer:
c. the spinner landing on orange or red
Step-by-step explanation:
So first you find how much is green
25 + 15 + 40 = 80
100 - 80 = 20
So the amount green is 20%
Then you choose the color that has the biggest percentage because it has a higher change of being chosen
25% is red
15% is blue
40% is orange
20% is green
orange and red is the biggest amount/ has the biggest percentage
c is your answer
Gavin needs to buy candy for the 11 students in his class plus himself. Gavin and each student will get one bag of candy. He uses $20 to buy two different types of candy. Gavin buys x bags of gummy bears that cost $1.50 per bag and y bags of chocolates that cost $2.00 per bag. The system of equations used to represent this situation is graphed, as shown.
Answer:
20=1.50(6)+2.00(4)
Step-by-step explanation:
Answer:
4
Step-by-step explanation:
Which trig ratio would you use to solve for the missing angle measure? 5 A) Cos! 26 26 B Cos-1 5 C) Sin 26 Sin? 26 5
Answer: Choice A) [tex]\cos^{-1} \frac{5}{26}[/tex]
You could also write [tex]\cos^{-1} \left(\frac{5}{26}\right)[/tex] which is the same as writing [tex]\arccos\left(\frac{5}{26}\right)[/tex]
Arccos stands for "arccosine", which is effectively the same as inverse sine. The notation [tex]\cos^{-1}[/tex] means inverse cosine.
We use the cosine rule because
cos(angle) = adjacent/hypotenuse.
isolating the angle leads to
angle = arccos(adjacent/hypotenuse)
We can think of arccosine as an operation to undo the cosine function. It's similar to how division is the opposite of multiplication.