Answer:
98%.
Step-by-step explanation:
The following data were obtained from the question:
Test 1 (T₁) = 83%
Test 2 (T₂) = 91%
Test 3 (T₃) = 88%
Test 4 (T₄) =?
AVERAGE = 90%
We can obtain the score of 4th test by doing the following:
AVERAGE = (T₁ + T₂ + T₃ + T₄) /4
90 = (83 + 91 + 88 + T₄) /4
90 = (262 + T₄) /4
Cross multiply
90 × 4 = 262 + T₄
360 = 262 + T₄
Collect like terms
360 – 262 = T₄
T₄ = 98%
Therefore, Sam need to score 98% in the 4th test in order to have an average score of 90%.
Divide (5.6*10^15)by(6.4*10^2)and in scientific notation
Answer:
3.584 ×[tex]10^{18}[/tex]
A sandwich is 2 12 feet long. You decide to cut the sandwich into pieces that are 1 14 feet long. How many pieces will you cut?
Answer:
2 pieces
Step-by-step explanation:
2 1/2-1 1/4=1 1/4, so 2
-3(x+4) what’s the answer to this?
Answer:
-3x-12
Step-by-step explanation:
Answer:
-3x-12
Step-by-step explanation:
This is a problem of distribution.
Distribute means to multiply the variable outside the perenthesis to what's inside the perenthesis.
What you are going to do is distribute the -3 to the x and 4
-3 times x is -3x
-3 times 4 is -12
Make sure the signs are correct and the new expression is -3x-12
what is 200 times 1238
Step-by-step explanation:
the answer is 247,600
hope this helps
Answer: the answer is 247,600
Step-by-step explanation:
-
Michael uses lemonade concentrate and water to make lemonade for the family. The ratio of cups of lemonade
concentrate to cups of water is 1:3. If he made 32 cups of lemonade for the family, how many cups of
concentrate did he need?
Answer:
8 cupsStep-by-step explanation:
Given that the ratio is 1:3
concentrate =1
water=3
the total =3+1=4
using the part to all method
1/4=x/32
cross multiply
4x=32
divide both sides by 4 we have
x=32/4
x=8
Therefore the amount of concentrate is 8 cups
what's 4 divided by 142.09 in long division
Answer: 35.522
Step-by-step explanation:
Answer:
35.5225
Step-by-step explanation:
4/142.09
look at each place starting in the hundredth place
how many times does 4 go into 14, 3 times
subtract the 12 from th 14 and you get a remainder of 2
drag the 2 down and you get 22
4 goes into 22 5 times
22-20=2
so on and so on
4/142.09
14-12=22 (3 times)
22-20=2 (5 times)
20-20=0 (5 times)
09-8=1 (2 times)
10-8=2 (2 times)
20-20=0 (5 times)
Thats as best as I can explain it, sorry if its confusing
Help needed! Click on the picture. Thanks to the people that help :)
Describe what you know about the angles of a triangle
Answer:
Similarity is it is beautiful like your mom
Step-by-step explanation:
All 3 angles of the triangle added up will be equal to 180 degrees.
Hope this helps, brainliest pls!
How much cents are in 12 quarterS answer fast!!!!
Answer: 300 cents or 3 dollars
Step-by-step explanation: 12x25=300.
Answer:
300 CENTS
Step-by-step explanation:
hope this helps
An item has a listed price $95. if the sales tax rate is 7%, how much is the sales tax?
Answer:
$6.65
Step-by-step explanation:
Total sales tax = Item cost [tex]*[/tex] sales tax rate
Item Price: $95
Sales tax rate: 7% = 0.07
[tex]95*0.07=6.65[/tex]
Total sales tax = $6.65
I hope this helps! (✿◕‿◕✿)
You are given a set of data with a mean of 50 and standard deviation of 8. Using the normal curve, give an example of an outlier and explain why.
Answer:
Anything less than 26, and greater than 74.
Step-by-step explanation:
In normal distribution, the outlier is more than e ≈ 2.72 standard deviations above quartile 3, and e standard deviations below quartile 1. These quartiles are divisions that make up what is known as the innerquartile range(IQR). Which defines the variability of a data set given by IQR = Q3-Q1.
Given that the mean of this data is 50, and the standard deviation is 8.
Our outliers are anything less than 26, and anything greater than 74. Since outliers are anything outside the mean plus and minus the standard deviation times 3
[tex] outliers :/ = :/ mean :/ \pm [/tex]
What is Y?
8.4=y-4.6
Answer:
13
Step-by-step explanation:
8.4 = 13-4.6
8.4 = 8.4
Answer: y=13
Step-by-step explanation:
I HAVE 2 MIN TO ANSWER THIS, HELP ME PLEASE HELP ME PLEASE HELP ME PLEASE HELP ME PLEASE HELP ME PLEASE HELP!!!!!!!!!!!!?!!!!!¡!
Answer:
its A possibly
Step-by-step explanation:
Answer:
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
Step-by-step explanation:
If 3/4 the way though the game Sam had 21 points, how many points would he expect to have for a full game? points
Answer:
I'm guessing 28
Step-by-step explanation:
because 3/4 of 21 is 28
3. What do you notice?
write each number in word form and short form
9) 543,698
10) 45,987,159.9
Answer:
9) five hundred and forty three thousand, six hundred and ninety-eight
500,000 + 40,00+ 3,000+ 600+ 90+ 8 = 543,698
10)forty-five million nine hundred eighty-seven thousand one hundred fifty-nine and nine tenths
40,000,000 + 5,000,000 + 900,000 + 80,000 + 7,000 + 100 + 50 + 9 + 0.9 = 45,987,159.9
Jenny wants to buy a new dress for her first school dance she barrows $25.63 from her sister to help pay for the dress then Jenny earns $16.33 helping her dad organize his home office if she gives all the earnings to her sister Jenny will still owe her sister $
Answer:
Jenny will owe her sister $9.30
Step-by-step explanation:
Subtract the money she earned from her dad from what she borrowed from her sister. $25.63-$16.33=$9.30 :)
3. Corbett’s sold 3 more footballs than basketballs on Saturday. In total, they sold 27 balls. How many of each kind were sold?
4. A hamburger has twice as many calories as a bowl of soup. Together they have 738 calories. How many calories are in each?
5. Carmen’s golf score was 6 strokes less than Lisa’s. Their two scores totalled 168. What was each girl’s score?
6. The sum of two consecutive numbers is 191. What are the two numbers?
Answer:
3.
let basketballs be x
and footballs will be 3 + x
3 + x + x = 27
2x = 27 - 3
2x = 24
x = 12
basketballs were 12 and footballs 15
4.bowl of soup x
hamburger 2x
2x + x = 738
3x = 738
x = 246
bowl of soup 246 calories
hamburger 492 calories
5. lisa x
carmen x - 6
x - 6 + x = 168
2x = 174
x = 87
lisa 87 strokes and carmen 81 strokes
6. first number x
second number x + 1
x + x + 1 = 191
2x = 190
x = 95
first number is 95 and second number is 96
y = 3x-2
slope
y-intercept =
Answer:
The slope is 3 and the y-intercept is -2
Step-by-step explanation:
The slope will always be the point by the x and the y-intercept is where the line crosses the y axis.
-1 = square root 5x – 9-X
If (62)x = 1, what is the value of x and please explain
From the sum of 3x +4y -3xy and 5x +3y -2xy subtract the sum of 2x +y – 3xy and 10x -9y -8xy
Answer:
5x-1y-11y
Step-by-step explanation:
3x+4y-3xy+5x+3y-2xy-2x+y-3xy+10x-9y-8xy
2x+5x+4y+3y-3xy-2xy-2x+10x+y-9y-3xy-8xy
7x+7y-5xy-12x-8y-11xy
7x-12x+7y-8y-11xy
-5x-1y-11xy
1 2/3 + 4 1/3 equals?
Answer:
6
Step-by-step explanation:
Answer:
6
Step-by-step explanation:
Amanda, Bethany, and Christina are all sisters.
The sum of the ages of the sisters is 40. Amanda is 5 more than double Christina's age. The
difference between Bethany's and Christina's age is 3. Write a system for this scenario.
A+B+C= 40
2C +5=A
B-C=3
A is Amanda, B is Bethany and C is Christina
Which equation best represents the linear function graphed below? CAN YOU BE REALLY QUICKLY THIS IS A MAJOR GRADE AND I ONLY HAVE 90 MINUTES
Answer:
y+1= 1/4(x-4)
Step-by-step explanation:
y+1 = 1/4(x-4)
y+1 = 1/4x-1
y = 1/4x -2 -which is the equation of the line
what is f(1) its for my math assignment
Which of the following values are solutions to the inequality –4 > 5x – 3?
A. -6
B. 7
C. 5
Answer:
B 7
Step-by-step explanation:
5 stars plz mark a brainleast
To gather data for a statistics project, a student asked 10 friends how many hours of sleep they got on the previous night. The data are shown in the following list.
Answer:
3
Step-by-step explanation:
INTERQUARTILE RANGE (IQR) = Q3 - Q1
Rearranging the data: 3, 4, 5, 5, 6, 7, 7, 8, 9, 9
Q3 = 0.75(n+1)th term
Q3 = 0.75(10 + 1) th term
Q3 = 0.75(11)th term = 8.25th term
Taking the 8th term = 8
Q1 = 0.25(11)th term = 2.75th
Taking the average of the 8th and 9th term:
(5 + 5) / 2 = 10/2 = 5
Q3 - Q1 = (8 - 5) = 3
A quadrilateral is shown below.
5bº
4bº
4bº
5b7
Find the value of the variable.
The EPA wants to know the daily level of pollutant discharge in the manufacturing district in Pittsburgh for February 2005. The monitoring equipment reveals that the mean daily discharge per factory (calculated as total areal discharge divided by total areal factories) is 30.2 tons with a standard deviation of 9.1 tons. Construct a confidence interval for the true population mean of pollutant discharge using a 95% level of confidence.
Answer:
The 95% confidence interval for the true population mean of pollutant discharge is (26.7 tons, 33.7 tons).
Step-by-step explanation:
Let X represent the daily level of pollutant discharge in the manufacturing district in Pittsburgh.
The monitoring equipment reveals that for the 28 days of the February month
Mean daily discharge per factory, ([tex]\bar x[/tex]) = 30.2 tons
Standard deviation daily discharge per factory, (s) = 9.1 tons
Compute the critical value of t for 95% level of confidence and (n - 1 =) 27 degrees of freedom as follows:
[tex]t_{0.05/2, 27}=2.052[/tex]
*Use a t-table.
Compute the 95% confidence interval for the true population mean of pollutant discharge as follows:
[tex]CI=\bar x\pm t_{\alpha/2, (n-1)}\cdot\frac{s}{\sqrt{n}}[/tex]
[tex]=30.2\pm 2.052\times\frac{9.1}{\sqrt{28}}\\\\=30.2\pm 3.53\\\\=(26.67, 33.73)\\\\\approx (26.7, 33.7)[/tex]
Thus, the 95% confidence interval for the true population mean of pollutant discharge is (26.7 tons, 33.7 tons).
