1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Juliette [100K]
2 years ago
13

Persons taking a 30-hour review course to prepare for a standardized excam averago a score of 620 on that exam. Persons taking a

70-hour review course average a score of 809. Find a linear function, S(t), which fits this data, and which
expresses score as a function of time. Use this function to predict an average score for persons taking a 42-hour review course. Do not round until the final answer. Then round to the nearest tenth as needed.
Mathematics
1 answer:
wolverine [178]2 years ago
6 0

Answer:

S(t) = 4.725t + 478.25

S(t) = 4.725(42)+478.25

S(t) = 676.7

Step-by-step explanation:

In the question, score is a function of time, that means time is the x-axis, while score is the y-axis.

Order the pairs to get:

(30,620) and (70, 809)

With these values, you use the the equation \frac{x2-x1}{y2-y1} to get the slope m.

\frac{70-30}{809-620}  = 4.725

Use this equation and input any ordered pair to get the final function.

y-y1 = m(x-x1)

y-620 = 4.725x-141.75

y = 4.725x + 478.25

Replace x with t and y with S(t) to fit the x & y axis of the question.

You might be interested in
Please help me ASAP! Thank you!
Maurinko [17]
In step 2, you are adding 35.10 and 84.60. You carry the 1 to the 1's place after you add up the tenths and the hundreds place.
6 0
3 years ago
Read 2 more answers
For his long distance phone service, Manuel pays a $2 monthly fee plus 12 cents per minute. Last month, Manuel's long distance b
irga5000 [103]

Answer:

126 minutes

Step-by-step explanation:

8 0
3 years ago
Sam is 3 years younger then Marco . Marco is 15 how old is Sam
vodomira [7]
Sam will be = 15 - 3 = 12 years.
6 0
3 years ago
Read 2 more answers
How do I write y=2x-7 in function notation?
mrs_skeptik [129]
Thus is how you write y=2x-7 in a function notation. ANSWER:F(x)=2x-7.
5 0
3 years ago
Read 2 more answers
Jay estimates that a basketball weights about .5 pounds. Shawna estimates that a basketball weights about.05. Whose estimate is
Natasha_Volkova [10]

Answer:

Jay's estimate is closer to the actual weight of the basketball

Step-by-step explanation:

The standard weight of an NBA basketball is 1.4 pounds.

Judging the accuracy of Jay's and Shawna's answer based on their percentage error when compared with the standard, we have that Jay's answer has a lower error as shown below

Error  = (Standard value - Estimated value)/ Standard Value ×100

Error in Jays answer = \frac{1.4 - 0.5}{1.4} × 100 = 64.28 %

Error in Shawna's answer = \frac{1.4 - 0.05}{1.4} × 100 = 96.42%

From this, It is obvious that Jay's answer has a lower percentage error when compared to the actual value.

8 0
3 years ago
Other questions:
  • A couple decided to have 4 children.
    15·1 answer
  • The health care Jimmy’s employer offers is a fee-for-service plan in which Jimmy and his family must pay for $12,500 in health r
    15·1 answer
  • The first row of a section in a concert hall has 20 seats. The second row has 21 seats. The third row has 22 seats. This pattern
    11·2 answers
  • A) Car A travels x km for every litre of petrol while car B travels
    9·1 answer
  • In a function you cannot have to of the same x values right?
    12·1 answer
  • Daniel and William have some marbles. Daniel finds that 2/5 of the marbles he has is 4/5 the number marbles William has. William
    5·2 answers
  • Jacob has 2 gifts he gives 1 gift to Sally how many gifts does Jacob have now?
    5·2 answers
  • I need help ASAP. I need help can someone explain and can anyone tell me the answer please . I’ll give u anything u want
    8·1 answer
  • Whats is the value of x in 9/5x = 2/3
    9·1 answer
  • Please help me!!!!!!!
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!