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Juli2301 [7.4K]
3 years ago
8

For several years, Graham has gathered data on students who own a computer and on their performance on a typing-speed test. He c

reates the linear model y = 3.8x + 17.4 where y represents the typing speed, in words per minute, of a student and x represents the number of years the student has owned a computer. According to Graham’s model, what is the approximate speed of a student who has owned a computer for three years?
Mathematics
1 answer:
MrRa [10]3 years ago
7 0

Answer:

29 words/min

Step-by-step explanation:

y = 3.8x + 17.4

y = (3.8 x 3) + 17.4

y= 11.4 + 17.4

y = 28.8 --- 29 words

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In the figure, AB is a diameter of circle P. What is the arc measure of AD in degrees?
fiasKO [112]

The arc measure of AD in degrees is 43 degrees.

<u>Step-by-step explanation</u>:

  • The angle measure of the straight line is 180°.
  • ∠APD + ∠DPC + ∠CPB = 180°

⇒ (7x+1)° + 90° + (9x-7)° = 180°

⇒ 16x + 84° = 180°

⇒ 16x = 96°

⇒ x = 96/16

x = 6

Substitute x=6 for angle ∠APD = (7x+1)°

∠APD = 7(6)+1 = 43°

The arc measure of AD in degrees = 43 degrees.

8 0
3 years ago
A bike tire has a diameter of 16 inches. What is the radius of the bike? What is the circumference of the bike?
Alexeev081 [22]

Answer:

radius-8 inches cause math

circumference-50.27

Step-by-step explanation:

3 0
3 years ago
Drew works at a laundromat. Every day for two weeks, he records the total number of loads of laundry washed at the laundromat. T
Afina-wow [57]

Answer:

B

Step-by-step explanation:

The first quartile of his data is 60.

The median of his data is 82.

The first quartile Q1 is the median of the lower half of the data set. This means that about 25% of the numbers in the data set lie below Q1 and about 75% lie above Q1.

The median Q2 is the median of  the data set. This means that about 50% of the numbers in the data set lie below Q2 and about 50% lie above Q2.

Between Q1 and Q2 lie exactly 25% of the numbers in the data set.

25% of 200 is exactly 50, so option B is true.

6 0
3 years ago
What is the value of x in 145.95-2x=-4.05?
kotykmax [81]
145.95 - 2x = -4.05
subtract -145.95 from both side of the equation
-2x = -4.05 - 145.95
-2x = -150
Divide both sides by -2
-2x/2 = -150/2

x = 75
Final answer

Hope this helps!!!!
3 0
3 years ago
the new basketball team playoff shirts are $42.52 plus $7.05 sales tax what is the amount and what's the cost of the t-shirts​
baherus [9]
The total would be $49.57
3 0
3 years ago
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