MATHEMATICS HIGH SCHOOL

If 30 marks is 40% what is full marks

Answers

Answer 1

Answer:

Answer:

Let the full marks be y.

Then, the statement become : 30 marks is 40 % of y.

to solve for y;

40% of y can be written as $(40)/(100) * y$

Then,

from the given condition we have;

$(40)/(100) * y =30$

$(4)/(10)y =30$

Multiply both sides by $(10)/(4)$ in above equation;

$(4)/(10)y * (10)/(4) =30 * (10)/(4)$

Simplify:

$y= (300)/(4)=75$

Then, the full marks (y) = 75.

Therefore, 30 marks is 40% of 75.

Check:

30 = $(40)/(100) * 75$

30 = $0.4 * 75$

30 =30 [True]

Answer 2

Answer: 100% are 75 marks because,
30 + 30 = 60
(40%+40%)
then you half 30 which is 15
60+15=74
(you half the 40 and add 80 to 20
20+80=100) 75 marks

helped?

can you put me on the brainlest answer?
please

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The answer is the third one.

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-1≤ 3x-10≤ 2 please help me

Answers

Answer:

3≤ x≤ 4

Step-by-step explanation:

-1≤ 3x-10≤ 2

Add 10 to each side

-1+10≤ 3x-10+10≤ 2+10

9≤ 3x≤ 12

Divide each side by 3

9/3≤ 3x/3≤ 12/3

3≤ x≤ 4

Answer:

3 ≤ x ≤ 4

Step-by-step explanation:

Step 1: Add 10 to all parts/sections.

$-1 + 10 \leq 3x - 10 + 10 \leq 2+10$
$9\leq 3x\leq 12$

Step 2: Divide all parts/sections by 3.

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Therefore, the answer is 3 ≤ x ≤ 4.

Find the diagonal of a square with a perimeter of 28 inches

Answers

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The cost to mail a one ounce letter was 39 cents and the cost to mail a two once letter was 63 cents. What is the ratio of the cost to mail a one ounce letter to the cost to mail a two ounce letter

Answers

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