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tatuchka [14]
3 years ago
14

An instructor has graded 23 exam papers submitted by students in a class of 24 students, and the average so far is 67. (The maxi

mum possible score is 100.) How high would the score on the last paper have to be to raise the class average by 1 point? By 2 points?
Mathematics
1 answer:
Ne4ueva [31]3 years ago
6 0

Answer:

(oo) ========8

Step-by-step explanation:

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Name the property shown by the statement 3(42) = 3(40) + 3(2)
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You and your family left the house for a vacation at 8 A.M. You promptly fell asleep in the
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201 miles.

Step-by-step explanation:

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Hamish and Harry work as plumbers. Harry earns a dollar more than the amount Hamish earns per hour. The amount Harry earns per h
natulia [17]

Answer:

Hamish and Harry work as plumbers. Harry earns a dollar an hour more than 5/4 the amount hamish earns per hour. harry earns per hour is 2$ less than 7/5 the amount hamish earns per hour. how much do each of them make an hour

Step-by-step explanation:

Let

x is the  amount Harry earns 

y is the amount Hamish earns 

x=(5/4)y+1 ⇒ (x-1)*4/5 = y-------- equation 1

x=(7/5)y-2⇒ (x+2)*5/7 = y-------- equation 2

equals 1 and 2

(x-1)*4/5 = (x+2)*5/7

(4x-4)/5 = (5x+10)/7

(4x-4)*7 = (5x+10)*5

28x-28 = 25x+50

28x-25x = 50+28

3x = 78

x = 26

substitute x = 26 for y=(x-1)*4/5

y = (x-1)*4/5

y =  (26-1)*4/5

y = 20

the answer is

<h3>Harry earns $26 an hour</h3><h3>Hamish earns  $20 an hour</h3>
7 0
3 years ago
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I need help answering these algebra questions, please help me i will qive brainliest to who ever answers first and is correct
Lynna [10]

Answer:

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Step-by-step explanation:

1. x=5, is a vertical line cutting the x axis at 5

2. y=-3 is a horizontal line cutting the y axis at -3

3. x= -4, is a vertical line cutting the x-axis at -4

4. y=9, is a horisontal line cutting the y-axis at 9

4 0
3 years ago
Please help! Chapter test tomorrow!!<br>PLEASE i need to show the work, the equations.
Nana76 [90]

Answer:

x=6

Step-by-step explanation:

4x-15=2x-3

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