A professor determined the relationship between the time spent studying (in hours) and performance on an exam. Performance = 70.443 + 4.885 * (time) Ann studied 2.6 hours for the last exam. However there was a concert in town the night before and her score was 16 points lower than expected. What was her score on this exam, rounded to the nearest integer?

Answers

Answer 1

Answer: First we need to calculate Ann's predicted score.

$Predicted Score = 70.443 + (4.885)(2.6)$

Ann's predicted score was 83.114

Since her actual score was 16 points lower than this, we just subtract.

$Real Score = 83.114 - 16$

Ann's real score was 67.114

When rounded to the nearest interger Ann's score is 67

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What adds up to 11 and multiplies to -80

Answers

let your number be x

your equation will be (x+11)x = -80
expand the equation x^2 +11x +80 = 0
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its +16 and -5.
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The water level drops 6 inches over 2 an a half days by how much did it change each day?

Answers

Answer:

2.4

Step-by-step explanation:

6/2.5=2.4

Walmart sell toothbrushes for 3.50 a pack but only pays 1.15 for them.What is the markup rate based on selling price?(answer Quickly please)

Answers

Answer:

2.45

Step-by-step explanation:

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using the tables presented in your reading material,find the maturity value of a $1 at a compound interest rate of 9% over 4 periods.a.1.3859 b.1,4116 c.1,4641 d.1,4661

Answers

The value is 1 dollar.
With compound interest rate of 9% over 4 period.
=> 1 dollar * .09 = 0.0081
=> 1.0081 * 0.09= 0.090729
=> 0.090729 + 1.0081 = 1.098829
=> 1.098829 * .09 = 0.09889461
=> 1.098829 *+ 0.09889461 = 1.19772361
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Answer:

b. $1,4116

Step-by-step explanation:

just look in the chart it shows you the answer

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Answers

10 hours is the answer

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3.) 103.30
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Answers

The answer is option 2. Pam will earn an interest of $133.50 from his savings account of $890 with an interest of 3%. Simple interest, also known as flat rate interest, is an interest to be paid or earned each year having a fixed percentage from a principal amount. It is calculated as follows:
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