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Digiron [165]
2 years ago
11

So far this semester, Warren is averaging a score of 72 points on math tests, which is 20% lower than his average last semester.

What was the average of his scores last semester?
Mathematics
2 answers:
ankoles [38]2 years ago
5 0

Answer:

86.4

Step-by-step explanation:

72x.20= 14.4

72+14.4=86.4

I'm pretty sure this is right

ahrayia [7]2 years ago
3 0
86.4
You have to multiply .20 and 72. which equals 14.4. it was 20% lower so u have to add the 14.4 to the 72 which equals 86.4
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Mrs. Crosland asked students to factor the expression 282
Solnce55 [7]

Well formatted version of the question can be found in the picture attached below :

Answer:

Both Carlos and Irene

Step-by-step explanation:

Given the expression (28x - 8)

Carlos : 2(14x - 4)

Danny : 7(4x - 1)

Irene : 4(7x - 2)

The factored expression Given by Carlos, Irene and Danny can be expanded to check if it gives the same expression as that Given in the question :

Carlos :

2(14x - 4)

2*14x - 2*4

28x - 8

Danny :

7(4x - 1)

7*4x - 7*1

28x - 7

Irene :

4(7x - 2)

4*7x - 4*2

28x - 8

From.the expanded solutions obtained ;

Both Carlos and Irene's solution corresponds to the factored form of the original equation and are Hence correct

7 0
3 years ago
Round 97.081 to the nearest 10th
Travka [436]

Answer:97.1

Step-by-step explanation:

7 0
2 years ago
Read 2 more answers
What is the least common multiple of 47, 26, and 7?​
kirza4 [7]

Answer:

The least common mutible for 47,26, and 7 is "8554".

6 0
3 years ago
Read 2 more answers
Help cant use calcultor??? 437 + 356 = ?
Zinaida [17]
437 + 356= 793

ANSWER: 793

Hope this helps! :)
7 0
3 years ago
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The graphs of the function f (given in blue) and g (given in red) are plotted above. Suppose that u(x)=f(x)g(x) and v(x)=f(x)/g(
Rus_ich [418]
U(x) = f(x).(gx)
v(x) = f(x) /  g(x)

Use chain rule to find u(x) and v(x).

u '(x) = f '(x) g(x) + f(x) g'(x)

v ' (x) = [f '(x) g(x) - f(x) g(x)] / [g(x)]^2

The functions given are piecewise.

You need to use the pieces that include the point x = 1.

You can calculate f '(x) and g '(x) at x =1, as the slopes of the lines that define each function.

And the slopes can be calculated graphycally as run / rise of each graph, around the given point.

f '(x) = slope of f (x); at x = 1, f '(1) = run / rise = 1/1 = 1

g '(x) = slope of g(x); at x = 1, g '(1) = run / rise = 1.5/ 1 = 1.5

You also need f (1) = 1 and g(1) = 2

Then:

u '(1) =  f '(1) g(1) + f(1) g'(1) = 1*2 + 1*1.5 = 2 + 1.5 = 3.5

v ' (x) = [f '(1) g(1) - f(1) g(1)] / [g(1)]^2 = [1*2 -  1*1.5] / (2)^2 = [2-1.5]/4 =

= 0.5/4 = 0.125

Answers:
u '(1) = 3.5
v '(1) = 0.125

 


 

3 0
3 years ago
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