your friend rent 10chairs and 2 tables for $300. another friend rent 8 chairs and 4 tables for $360 you want to rent 12 chairs and 3 tables how much do you expect to pay? ps I need it today
Answers
10x+2y=300
8x+4y=360
solve for y and substitute to find x
10x+2y=300
2y=300 -10x
y=150 -5x so put 150 -5x in for y in the other equation
8x+4(150-5x)=360
8x+600-20x=360
-12x=-240
x= $20 per chair
put that in for x in either equation to find y
10(20)+2y=300
2y=300-200
y=100/2
y= $50 per table
12 chairs and 3 tables would cost 12(20)+3(50)=240+150=
$390
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A 97 ====> 100
B 118 ===> 120
C 179 ===> 180
D 5091 ==> 5090
No result yet, lets round to the nearest hindred.
A 97 ====> 100
B 118 ===> 100
C 179 ===> 180
D 5091 ==> 5100
As we can see only A give the same result when we round it to the nearest hundred and nearest ten.
Answers
26, 27, 28, 29, 30, 31, 32
Hope i helped. Have a nice day.
Answers
so 420/12=35
35 times7=245 mph
35 x 7(hours) = 245 miles flown in 7 hours
Answers
Answer:
1
Step-by-step explanation:
Answer:
es de 2; 3 ;4...
Step-by-step explanation:
all natural numbers greater than 1
B: Scores below the top 8% and above the bottom 61%
C: Scores below the top 39% and above the bottom 16%
D: Scores below the top 84% and above the bottom 8%
F: Bottom 8% of scores
Scores on the test are normally distributed with a mean of 65.4 and a standard deviation of 9.7. Find the numerical limits for a D grade. Round your answers to the nearest whole number, if necessary.
Answers
B. Scores below the top 8 and above
Final answer:
The numerical limits for a D grade in psychology can be calculated using the Z-score formula. The cutoff scores are below the top 84% and above the bottom 8%. Using the mean of 65.4 and the standard deviation of 9.7, the numerical limits for a D grade are 52 to 79.
Explanation:
To find the numerical limits for a D grade, we need to determine the cutoff scores. According to the given scheme, a D grade corresponds to scores below the top 84% and above the bottom 8%. To calculate these cutoff scores, we can use the Z-score formula. The Z-score is calculated as the difference between a score and the mean, divided by the standard deviation. Using the Z-score table, we can find the Z-scores corresponding to the top 8% and the bottom 8%. Finally, we can use the Z-score formula to find the corresponding scores for those Z-scores.
Given that the mean is 65.4 and the standard deviation is 9.7, we can calculate the Z-scores:
Z-score for the top 8% = 1.405
Z-score for the bottom 8% = -1.405
Using the Z-score formula, where X is the score, the mean is 65.4, and the standard deviation is 9.7:
X = Z * standard deviation + mean
For the top 8%:
X = 1.405 * 9.7 + 65.4 = 79
For the bottom 8%:
X = -1.405 * 9.7 + 65.4 = 52
Therefore, the numerical limits for a D grade are 52 to 79 (rounded to the nearest whole number).
Learn more about Cutoff scores for a D grade in psychology here:
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Answers
The required, Mrs. Simpson's speed was 42 miles per hour.
What is speed?
Speed is defined as when an object is in motion, the distance covered by that object per unit of time is called speed.
Here,
To find the speed (or velocity) in miles per hour, we need to divide the distance traveled (in miles) by the time taken (in hours).
Mrs. Simpson drove 105 miles in 2 1/2 hours, which can be written as:
Time taken = 2.5 hours
Distance traveled = 105 miles
Speed = Distance / Time
Speed = 105 miles / 2.5 hours
To divide 105 by 2.5, we can convert the mixed number 2 1/2 to an improper fraction:
2 1/2 = 5/2
Then we can divide:
Speed = 105 miles / (5/2) hours
Speed = 105 miles * (2/5) hours
Speed = 42 miles/hour
Therefore, Mrs. Simpson's speed was 42 miles per hour.
Learn more about speed here:
brainly.com/question/7359669
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Mrs.Simpsons drove at a rate of 42 miles per hour.