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Elena L [17]
3 years ago
10

If 80% is 72 marks, what is full marks?

Mathematics
1 answer:
zysi [14]3 years ago
6 0
Use\ a\ proportion:\\\begin{array}{ccc}80\%&-&72\\100\%&-&x\end{array}\ \ \ |cross\ multiply\\\\\\80\cdot x=72\cdot100\\80x=7,200\ \ \ |diviede\ both\ sides\ by\ 80\\\boxed{x=90}\leftarrow your\ answer
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Sam is the perpendicular bisectors of tr. angle tsr=120. Find angle str
Gemiola [76]
30 degrees due to the fact that all triangles interior angles add up to 180 degrees and there are two other angles meaning it is 30 degrees
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3 years ago
How do I simplify a fraction? For example if the question is 7 1/5 divided by 2 2/15 what would I do to simplify?
Westkost [7]
7 1/5:
Multiply the denominator and the whole number: 7*5 = 35 and then add the numerator: 35+1= 36/5. Then, do this for the following fraction, the improper fraction value of 2 2/15 is 32/15.
Now we need 36/5 & 32/15 to have common denominators so that we can simplify it a little less complicated.

For Instance,

36/5*3= 108/15

Now we divide, (108/15)/(32/15)
108/32= 3.375 = 3 3/8

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3 years ago
A line passes through (4,5,) which points is also on the line
goldfiish [28.3K]

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Step-by-step explanation:

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3 years ago
The library has 65,400 art books and 9,600 science book what part off all books are science books?
Mashcka [7]
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8 0
2 years ago
What is the solution for the system of equations? Use the elimination method to solve. 2x+y=20 -5y=-6x+12
egoroff_w [7]

Given Equations :

✿  2x + y = 20 ------------------ [1]

✿  6x - 5y = 12 ----------------- [2]

Multiplying Equation [1] with 5, We get :

⇒ 5(2x + y) = 5(20)

⇒ 10x + 5y = 100 -------------- [3]

Adding Equations [2] and [3], We get :

⇒ (10x + 5y) + (6x - 5y) = 100 + 12

⇒ 16x = 112

⇒ x = 7

Substituting x = 7 in Equation [1], We get :

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⇒ y = 20 - 14

⇒ y = 7

So, The Solution for the Given System of Equations is : (x , y) = (7 , 7)

3 0
3 years ago
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