Answer:
true
Step-by-step explanation:
just collect the like terms
47.1 48.2 48.3 47.5 48.5
48.1 47.2 48.2 48.4 48.3
1. What proportion of the reactions were above the 48 grams threshold?
2 .Other chemists typically get 65% of their reactions to produce more than 48 grams. Should the engineer say that she was able to increase the useful product when compared to the other chemists?
Group of answer choices
Answer:
1. 0.7 since 7 of the 10 reactions had more than 48 grams of the useful product.
2. She could be optimistic, but her proportion does not seem far from what others have done. She should run more reactions to be more sure of the improvement. With only 10 values in her data set, 0.7 (and 0.6) is as close to 0.65 as she could get.
Step-by-step explanation:
Just trust me
what is the y intercept of this graph
Answer:
The y-intercept is the point at which the graph crosses the y-axis. At this point, the x-coordinate is zero.
If the rate , in gallons per minute , continues , approximately how many gallons of water from the hose in 45 minutes ?
Please do help
what is the measure of NEED HELP ASAP!
Answer:
of what
Step-by-step explanation:
Find the slope, x-intercept, and y-intercept of the lines with the given equations.
y=2x+4
Answer:
here you go! y = 2 x + 4. Swap sides so that all variable terms are on the left hand side. Swap sides so that all variable terms are on the left hand side. 2x+4=y. 2 x + 4 = y. Subtract 4 from both sides. Subtract 4 from both sides. 2x=y-4. 2 x = y − 4
Answer:
2, 4, -2
Step-by-step explanation:
The slope is directly in the equation, the variable m in the slope-intercept form of y = mx + b. This means that the slope is 2.
The y-intercept is the variable b in standard form, so 4 in this case.
To find the x-intercept, set y equal to zero.
0 = 2x + 4
2x = -4
x = -2
Solve the system by graphing
y=x+2
y=-1/2x-4
Answer:
(y,x)=(12,-10)
Step-by-step explanation:
i think
What is 1 4/7 + 1/8 ?
Answer:
[tex]\frac{95}{56}[/tex] or [tex]1\frac{39}{56}[/tex]
Step-by-step explanation:
hope this helps have a good day :)
Answer:
Decimal Answer: 1.7
Fraction Answer: 1 39/56
HELP order to find the percentage of households in a town that own more than one vehicle, a survey asks 1000 randomly selected drivers at a
as station how many vehicles are owned in their household. From the results of the survey, it is reported that 67% of households in the town
mave more than one vehicle,
Why is this report biased?
O A. A random sample was used.
O B. The sample size was too small.
C. A survey should not have been used.
D. Households without a vehicle were not surveyed.
quickly help 2//////////////////////////////////
Answer:
A. , C. ,
Step-by-step explanation:
Because perimeter is the area around. there are 4 sides, and two of them are same, and the other two are same. add the sides to get 6.
Answer:
Step-by-step explanation:
multiply each dimension by 2 (P=2W+2L). Only A and C add up to 6 (2+4)
I WILL GIVE BRAINLIEST! Please answer these 5 questions correctly! (NO INCORRECT ANSWERS LINKS WILL BE REPORTED NO TROLL ANSWERS)
Answer:
1.) 4a + 55
2.) 88m + 24k - 55
4.) b and d
5.) b and d
6.) a
7.) 3x + x + 10
Step-by-step explanation:
Hope this helped :)
Two points are shown on the grid. Which line passes through the points?
Answer:
i think its b
Step-by-step explanation:
by the way the ponts are put down i also had this on my test
Maria pulls colored marbles out of a bag one at a time. Her results are shown in the table below.
Color Outcomes
Blue 36
Yellow 42
Black 18
White 24
Based on the outcomes, if 20 more marbles are pulled out of the bag and replaced, how many marbles can be expected to be white?
Answer:
4
Step-by-step explanation:
P(white) = 24/120
set up a proportion based on these results:
24/120 = x/20
cross-multiply:
120x = 480
x = 4
which of the following rectangle or prism‘s have a surface area of 24 square units
Answer:
YOU need to add a photo
A study on how circus ticket pricing influences ticket sales shows that there is an average increase of 4 people for every $3 decrease on the price
of the ticket. A circus owner sells an average of 340 tickets when the price of a ticket is $75. If x represents the number of times the price
decreases by $3, which function describes the revenue earned by the circus owner terms of x?
Answer:
circus ticket pricing influences ticket sales shows that there is an average increase of 4 people for every $3 decrease on the price
of the ticket. A circus owner sells an average of 340 tickets when the price of a ticket is $75. If x represents the number of times the price
decreases by $3, which function describes the revenue earned by the circus owner terms
Find the midpoint of the segment with the following endpoints
(-8, 9) and (0, 1)
Answer:
(-4,5)
x-midpoint -4
y-midpoint 5
Step-by-step explanation:
M=x1+x2/2 ,y1+y2/2
M=-8+0/2 , 9+1/2
M=-8/2,10/2
M=-4,5
x-midpoint -4
y-midpoint 5
The National Collegiate Athletic Association (NCAA) requires colleges to report the graduation rates of their athletes. At one large university, 91% of all students who started their studies in 2000-2010 graduated within 6 years. A sports reporter contacted 152 athletes randomly sampled from that same university and time period and found that 132 of them had graduated within 6 years.
(a) (5 points) Perform the appropriate hypothesis test to determine whether this is significant evidence that the percentage of athletes who graduate is less than for the student population at large, using the significance level a = 0.05. Remember for state the null and alternative hypotheses, the decision rule, and your conclusion.
(b) (3 points) Calculate the P-value for this test. Explain how this P-value can be use to test the hypotheses in part (a).
Answer:
a)
The null hypothesis is [tex]H_0: p = 0.91[/tex].
The alternate hypothesis is [tex]H_1: p < 0.91[/tex].
The decision rule is: accept the null hypothesis for [tex]z > -1.645[/tex], reject the null hypothesis for [tex]z < -1.645[/tex].
Since [tex]z = -1.79 < -1.645[/tex], we reject the null hypothesis and accept the alternate hypothesis that that percentage of athletes who graduate is less than for the student population at large.
b)
The p-value for this test is 0.0367. Since this p-value is less than the significance level of [tex]\alpha = 0.05[/tex], we reject the null hypothesis and accept the alternate hypothesis that that percentage of athletes who graduate is less than for the student population at large.
Step-by-step explanation:
Question a:
Perform the appropriate hypothesis test to determine whether this is significant evidence that the percentage of athletes who graduate is less than for the student population at large:
At the null hypothesis, we test if the proportion is the same as the student population, of 91%. Thus:
[tex]H_0: p = 0.91[/tex]
At the alternate hypothesis, we test that the proportion for athletes is less than 91%, that is:
[tex]H_1: p < 0.91[/tex]
The test statistic is:
[tex]z = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}[/tex]
In which X is the sample mean, [tex]\mu[/tex] is the value tested at the null hypothesis, [tex]\sigma[/tex] is the standard deviation and n is the size of the sample.
Test if the proportion is less at the 0.05 level:
The critical value is z with a p-value of 0.05, that is, z = -1.645. Thus, the decision rule is: accept the null hypothesis for [tex]z > -1.645[/tex], reject the null hypothesis for [tex]z < -1.645[/tex].
0.91 is tested at the null hypothesis:
This means that [tex]\mu = 0.91, \sigma = \sqrt{0.91*0.09}[/tex]
A sports reporter contacted 152 athletes randomly sampled from that same university and time period and found that 132 of them had graduated within 6 years.
This means that [tex]n = 152, X = \frac{132}{152} = 0.8684[/tex]
Value of the test statistic:
[tex]z = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}[/tex]
[tex]z = \frac{0.8684 - 0.91}{\frac{\sqrt{0.91*0.09}}{\sqrt{152}}}[/tex]
[tex]z = -1.79[/tex]
Since [tex]z = -1.79 < -1.645[/tex], we reject the null hypothesis and accept the alternate hypothesis that that percentage of athletes who graduate is less than for the student population at large.
(b) (3 points) Calculate the P-value for this test. Explain how this P-value can be use to test the hypotheses in part (a).
The p-value of the test is the probability of finding a sample proportion of 0.8684 or below. This is the p-value of z = -1.79.
Looking a the z-table, z = -1.79 has a p-value of 0.0367.
The p-value for this test is 0.0367. Since this p-value is less than the significance level of [tex]\alpha = 0.05[/tex], we reject the null hypothesis and accept the alternate hypothesis that that percentage of athletes who graduate is less than for the student population at large.
a person deposits rs 55000 in bank p for 2 years at the rate of 10% per annum compounded annually .but after one year , bank has changed the policy and decided to pay semi annual compounded interest at the same rate .what is the percentage difference between the compound interests of the first year and second year
Answer:
The interest generated the first year will be 10% of the principal value, while the second year said interest will be 10.25%.
Step-by-step explanation:
Given that a person deposits Rs 55000 in Bank P for 2 years at the rate of 10% per annum compounded annually, but after one year, bank has changed the policy and decided to pay semi annual compounded interest at the same rate, to determine what is the percentage difference between the compound interests of the first year and second year, the following calculation must be performed:
Year 1 =
55,000 x (1 + 0.1 / 1) ^ 1x1 = X
55,000 x 1.1 = X
60,500
Year 2 =
60,500 x (1 + 0.1 / 2) ^ 1x2 = X
60,500 x 1.05 ^ 2 = X
66,701.25 = X
55,000 = 100
60,500 = X
60,500 x 100 / 55,000 = X
110 = X
60,500 = 100
66,701.25 = X
66,701.25 x 100 / 60,500 = X
110.25 = X
Therefore, the interest generated the first year will be 10% of the principal value, while the second year said interest will be 10.25%.
A box, containing 25 bolts and 25 washers, has a mass of 475 g. Another box, containing 17 bolts and 34 washers, has a mass of 442 g. Determine the mass of one bolt and the mass of one washer
Answer:
bolts=12g and washers=7 g
Step-by-step explanation:
honestly, i tried to solve this by hand and made an error somewhere, but i set up two equations, then tried to use elimintation to solve for one variable. but in the end i went to my trusty calculator and created a matrix, then used the rref math to solve. sorry i couldnt be of more help
[tex] \large\sf \red{Simplify: - }[/tex]
[tex] \sf\: 4 \frac{1}{5}kg : 630g[/tex]
Step-by-step explanation:
=41/5kg/630 g
=21/5kg/630g
=21/5×1000 g/630g
=4200g/630g
=20/3
Answer:
[tex] \large \sf \blue{Find \: the \: H.C.F \: of : }[/tex]
[tex] \sf \purple{➪ \: 84 \: and \: 156}[/tex]
[tex] \large\sf \red{Simplify: - }[/tex]
[tex] \sf\: 4 \frac{1}{5}kg : 630g[/tex]
-,- -,- xD xD
Answer this question please ASAP!!!
Answer:
B.34
Step-by-step explanation:
i did the math and I sure it's correct but if it's not am sorry
Shelby Middle School is thinking of changing its dress code. What would be the best way to collect data?
Answer:
Choose every tenth student entering the school and ask them if they like the dress code or not.
Step-by-step explanation:
This is a question of sampling. We need to make non-biased predictions using non-biased data. We can sample from every tenth student to stay proportional. Sampling many students can collect more data and can help keep the data non-biased.
If my answer is incorrect, pls correct me!
If you like my answer and explanation, mark me as brainliest!
-Chetan K
TS is a midsegment of GHI, solve the value of x
Answer:
2x-7=(x+10)/2
2(2x-7)=x+10
4x-14=x+10
4x-x=10+14
3x=24
x=24/3
x=8
Step-by-step explanation:
Answer:
x = 8
Step-by-step explanation:
The midsegment is half of GI , that is
2x - 7 = [tex]\frac{1}{2}[/tex] (x + 10) ← multiply both sides by 2 to clear the fraction
4x - 14 = x + 10 ( subtract x from both sides )
3x - 14 = 10 ( add 14 to both sides )
3x = 24 ( divide both sides by 3 )
x = 8
Find the LcM of 160, 192,240
Given:
The numbers are 160, 192, 240.
To find:
The LCM of 160, 192, 240.
Solution:
The given numbers are 160, 192, 240. Write the factor forms of these numbers.
[tex]160=2\times 2\times 2\times 2\times 2\times 5[/tex]
[tex]160=2^5\times 5[/tex]
[tex]192=2\times 2\times 2\times 2\times 2\times 2\times 3[/tex]
[tex]192=2^6\times 3[/tex]
[tex]240=2\times 2\times 2\times 2\times 3\times 5[/tex]
[tex]240=2^4\times 3\times 5[/tex]
Now, the LCM of given numbers is the product of all prime factors with highest degrees.
[tex]LCM=2^6\times 3\times 5[/tex]
[tex]LCM=64\times 15[/tex]
[tex]LCM=960[/tex]
Therefore, the LCM of given numbers is 960.
It takes 2 minutes to fill a tank with 16 gallons of gasoline.
Answer:
and the question is...
Step-by-step explanation:
help me plsi have 7 mins to complete this test
Answer:
Step-by-step explanation:
the second one
PLEASE HELP!!
Which statement correctly describes the lines shown on the graph?
A) All three lines represent a proportional relationship.
B) None of the lines represent a proportional relationship.
C) Only the yellow line represents a proportional relationship.
D) Only the green and pink lines represent a proportional relationship.
Answer:
d
Step-by-step explanation:
Which expressions are equivalent to the given expression. Help me out please
Answer:
.............. .......
lemme explain, im a middle schooler and my school just jumped into this with no explanation.
Answer:
the first question is c
Step-by-step explanation:
2 x pi x the radius
2 x 3.14 x 8
which of the following expressions would solve for angle A?
Answer:
D
Step-by-step explanation:
The answer is the side opposite / hypotenuse.
Definitions
The side opposite is the side which is not connected directly with angle (A). So it is the line that is 24 units long.
The hypotenuse is the longest line of a right triangle. It is opposite the right angle. It is 30 in this case.
Answer
Sin-1(24)/30
You haven't got an answer that is correct.
Tan-1(24/18) would work
The answer that is given that will work is cos-1(18/30)
Question 6
2 pts
Charlotte invested $100 per year into a business for 3 years. The total value of her
investment after 3 years is represented by the algebraic expression below, where x is the
growth in value each year.
100 (x3 + x2 + x)
What is the total value of her investment when x = 2?
O $6400
O $1200
O $600
O $1400