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satela [25.4K]
3 years ago
11

A teacher working's day is 7 1/2 hours long. one certain day, he spent 3 1/2 hours teaching and 2 1/2 hours marking student assi

gnment. What fraction did he spend (a) Teaching (b) Marking.​
Mathematics
1 answer:
SpyIntel [72]3 years ago
4 0

Answer:

(a) 7/15

(b) 1/3

Step-by-step explanation:

(a) teaching:

(3 1/2) / (7 1/2) = (7/2) / (15/2) = 7/2 * 2/15 = 7/15

(b) marking:

(2 1/2) / (7 1/2) = (5/2) / (15/2) = 5/2 * 2/15 = 5/15 = 1/3

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PLEASE HELP LOOK AT THE PICTURE
hammer [34]

Answer:

x = 10

Step-by-step explanation:

-8(-3 + x) = -56

Distribute the -8 into the (-3 + x).

24 - 8x = -56

Subtract 24 from both sides.

-8x = -80

Divide both sides by -8.

x = 10.

Proof:

-8(-3 + x) = -56

Substitute variable.

-8(-3 + 10) = -56

Add inside parenthesis.

-8(7) = -56

Multiply.

-56 = -56

4 0
3 years ago
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About 60,000 acres of wetlands are lost each year in the United states. What integer represents the change in wetlands after 4 y
QveST [7]

Over 4 years, there will be a loss of 60,000 acres per year, so 60,000 times 4 is equal to 240,000 acres. 240,000 is positive because the problem asks for the change, not the increase.

This is the work you will show


c=-60,000(4)

c=-240,000


So -240,000 represents the change.


You could also just count by -60,000 four times.


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4 0
3 years ago
Question 5(Multiple Choice Worth 4 points)
Trava [24]

Answer: it is -1

Step-by-step explanation: rate of change can be defined as Δy/Δx, or the change in y over the change in c (commonly referred to as rise over run). By looking at the numbers we can see that the relationship modeled is linear (has a constant rate of change), so we are able to use this formula to calculate its rate of change. Simply calculate the change between any two values of y and (the associated) values of x and divide them to obtain your solution. I’m not the best at explaining math in words so here is the solution represented symbolically:

Rate of change = Δy/Δx

Δy/Δx = (y2-y1)/(x2-x1)

(y2-y1)/(x2-x1) = (1 - (-2))/(2 - 5) //the selected values for y2,y1,x2, and x1 are the last and first values for each, respectively.

3/-3 = -1

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3 years ago
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Alona [7]
7.856 thats the answer bruh
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3 years ago
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timurjin [86]

Answer:

c is the right answer of this

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3 years ago
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