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Pavlova-9 [17]
3 years ago
12

Determine whether quantities vary directly or inversely and find the constant of variation. A teacher grades 25 students essays

in 4 hours. Assuming he grades at the same speed, how long will it take him to grade 35 essays?
Mathematics
1 answer:
Gnom [1K]3 years ago
8 0
It will take him 5.6 hours to grade 35 essays
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If a point is om the prependicular bisector of a segm
irina [24]
Yes, that's a true statement.  It's either a theorem or
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5 0
3 years ago
3. What is the average speed in miles per hour if it takes 25 minutes to travel 4 miles?
alekssr [168]

Answer:

9.6 miles per hour

Step-by-step explanation:

First find the unit rate.

25/4= 0.16 miles per minute

Then multiply by 60 ( which we know theres 60 minutes in a hour.)

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6 0
3 years ago
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An orchard has 651 orange trees. The number of rows exceeds the number of trees per row by 10. How many trees are there in a row
natima [27]

Answer:

The number of trees in each row is  21.

Step-by-step explanation:

Let us assume the number of trees in each row  = m

So, the number of rows in the orchard = Number of trees in each row + 10

or, total number of trees in each row = (10 +m)

Now, Total number of Trees = Number of Rows x Number of trees in 1 row

⇒ 651  = m (m + 10)

651 = m^2 + 10m\\\implies  m^2 + 10m - 651 =0\\or,   m^2 + 31m  21m - 651 =0\\or, m(m +31) -21(m+31) =0\\\implies (m +31) (m-21) = 0

⇒ (m +31) = 0, or (m-21) = 0

⇒ m= -31, or m = 21

Now, as m = The number of trees in each row, so m ≠ -31

So, m =  21

Hence, the number of trees in each row is m = 21.

8 0
3 years ago
I fixed the question need help​
STatiana [176]

Answer:

D

Step-by-step explanation:

90-33=57

57-1=56

56/2=28

28

8 0
3 years ago
Which facts could be applied to the simplified expression. Check all that apply. 5x+3y+(-x)+62
Anettt [7]

Answer:

4x+3y+62

Step-by-step explanation:

the other variables wouldnt be able to do anything to 62 because they are different variables.

7 0
2 years ago
Read 2 more answers
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