You have $1.75 left
Step-by-step explanation:
Given,
Number of quarters already have = 20
Percent of quarters found = 40% of already have
Number of quarters found = 
Number of quarters found = 
Number of quarters found = 8
New total = 20+8 = 28 quarters
Percent of quarters spent = 75%
Number of quarters spent = 
Number of quarters spent = 
Number of quarters spent = 21
Quarters left = 28-21 = 7
1 quarter = 25 cents
7 quarters = 25*7 = 175 cents
$1 = 100 cents
175 cents = 
You have $1.75 left
Keywords: division, addition
Learn more about division at:
#LearnwithBrainly
Answer:
6 questions
Step-by-step explanation:
<u>First</u>, you divide the total score of 100 by the 64 questions to get 1.5625 points per question. <u>Next</u>, you divide the lowest score to qualify of 90 by the 1.5625 to get 57.6 questions correct to qualify. <u>Then</u>, you round 57.6 questions correct up to 58 questions correct because a fraction of a question correct doesn't make sense. <u>Finally</u>, you subtract the total number of questions (64) by the required correct answers (58) to get 6 questions you can miss to still qualify for the scholarship.
The answer is a, this is because 5(2+4) is the same as multiplying 5 by 6 to get 30. The reason we do this is because the length of the entire side is the sum of the bottom numbers
Answer:
A company produces electric insulators. The strength of the insulators is important since a broken insulator may cause a short circuit. Unfortunately, the strength varies significantly due to the material. Because of the expense, only a limited number of insulators could be tested. The engineers sampled 25 insulators (From a production run of 200), and conducted a destructive test to determine the force that was required to break the insulators. The mean value of this force was 1723 lbf with a sample standard deviation of 90 lbf. You may approximate the population standard deviation with the sample standard deviation for the following questions. a. Determine if the population is large enough or if a finite population correction (FPC) factor is needed. If so, what is the FPC factor? b. For 95% confidence, determine the margin of error (+ lbf) c. For these conditions, estimate the range of the probable population mean. Provide lower and upper values. For 95% confidence, determine the margin of error ( Assume the same mean and sample standard deviation. What is one advantage and one disadvantage of using 50 insulators instead of 25 insulators? d. lbf) if 50 insulators were tested.
Step-by-step explanation:
You solve this by plugging one equation into the other. Usually you have to rewrite one equation to make this work. In this case I choose to rewrite y-4x=0 as y=4x.
After plugging it into the second, you get:
3x + 6*4x = 9 => 27x = 9 => x=1/3
Putting this solution back into y=4x gives us y=4/3
