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Savatey [412]
2 years ago
10

to pass a course with an a grade a student must have an average of 90 or greater. a student's grade's on three tests are 83 91 a

nd 86. find what score the student must get on the next test to get an a average
Mathematics
1 answer:
Sedaia [141]2 years ago
5 0

Answer:

90

Step-by-step explanation:

Find total marks needed for a 90.

90 x 4 = 360 marks

Then, add up the marks on the three tests.

83+91+86 = 260 marks

Finally, subtract from the 360 marks needed.

360 - 260 = 100

Thus, the student needs to score 100 marks in order to get a 90.

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The length of a rectangular floor is 2 feet more than its width. The area of the floor is 168 square feet. Kim wants to use a ru
ioda
Let width of the floor be x feet, them area is
x(x+2)  = 168
x^2 + 2x - 168 = 0
(x - 12)(x + 14) - 0
so x = 12
the floor is 12 ft by 10 ft

the width of the rug should be 10 - 2(2) = 6 feet


4 0
3 years ago
Find the lengths and determine the measure of the missing angel (x)
inysia [295]
B= 60 
To find b you must do the pythagorean theorem because it is a right triangle
65^2 - 25^2=b^2
3600=b^2
60=b

x= 18 
To find x you must know that a triangle is made up of 180 degrees.
x= 180-(72+90)
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x=18

hope this helped :)
3 0
3 years ago
I need help!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Zina [86]

Answer:

Yes, x and y have a proportional relationship.  

Step-by-step explanation:

A proportional relationship means that, when comparing two quanities, that they are both changing at a constant (same) amount.  When looking at a table to compare quantities, you can see that the pounds of tomatoes 'x' is increasing by one (1) each time.  If you look at the amount spent in dollars 'y', you can see that for each pound (x), the cost is increasing by $4.  So, since for every pound of tomatoes that is purchased increases by $4, then their relationship is proportional.  

8 0
2 years ago
Logic gates I have no clue how to do this
kobusy [5.1K]

Answer: It is the 3rd option. But I am not sure if it is correct- pls tell me back if the answer was correct!

6 0
2 years ago
A sphere has a diameter of 4 x 10^-3 mm. What is the approximate volume of the sphere? Use 3.14 for pi.
kolezko [41]

Answer:

3.349 \times {10}^{ - 10} \:  {mm}^{3}

Step-by-step explanation:

d = 4 \times  {10}^{ - 3}  \: mm \\ r = 2 \times  {10}^{ - 3}  \: mm \\ V_{sphere}  =  \frac{4}{3} \pi {r}^{3}   \\ = \frac{4}{3}  \times 3.14 \times {(2 \times  {10}^{ - 3} )}^{3} \\  = \frac{4}{3}  \times 3.14 \times 8\times  {10}^{ - 9}  \\ = \frac{100.48}{3}  \times   {10}^{ - 9}  \\  = 33.4933333\times   {10}^{ - 9}  \\  = 33.49 \times {10}^{ - 9} \\  = 3.349 \times {10}^{ - 10} \:  {mm}^{3}

8 0
3 years ago
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