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dolphi86 [110]
3 years ago
15

If 120 marks is 60% what is full marks

Mathematics
1 answer:
AveGali [126]3 years ago
3 0
Let's say is "x", so, then "x" is the 100%, and we know that the 60% is 120, what the dickens is "x" anyway?

\bf \begin{array}{ccll}
marks&\%\\
\text{\textemdash\textemdash\textemdash}&\text{\textemdash\textemdash\textemdash}\\
x&100\\
120&60
\end{array}\implies \cfrac{x}{120}=\cfrac{100}{60}\implies x=\cfrac{120\cdot 100}{60}
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Solve the equation. Check for extraneous solutions. <br> 2|7−7x|=2x+4
Vesna [10]

2|7 − 7x| = 2x + 4

|7 - 7x| = x + 2

7 - 7x = x + 2   or   7 - 7x = -(x + 2)

-8x = -5   or   7 - 7x = -x - 2

x = 5/8   or -6x = -9

x = 5/8   or   x = 9/6

x = 5/8   or   x = 3/2

To check for extraneous solutions, we check both solutions in the original equation.

<em>Check solution 5/8:</em>

2|7 - 7x| = 2x + 4

|7 - 7x| = x + 2

|7 - 7 * 5/8| = 5/8 + 2

|56/8 - 35/8| = 5/8 + 16/8

21/8 = 21/8

<u>Solution x = 5/8 works.</u>

<em>Check solution 3/2:</em>

2|7 - 7x| = 2x + 4

|7 - 7x| = x + 2

|7 - 7 * 3/2| = 3/2 + 2

|14/2 - 21/2| = 3/2 + 4/2

|-7/2| = 7/2

7/2 = 7/2

<u>Solution 3/2 also works.</u>

Answer: x = 5/8 or x = 3/2

5 0
3 years ago
PLZZZZZZZZZ HELP ASAP!!!!!
expeople1 [14]

I don't know if this helps but the slope is -6/4

4 0
3 years ago
The mass of a vase is 0.3kilgram. A flower has a mass that is 0.03 times the mass of the vase. What is the mass of the flower?
deff fn [24]
Hello!

0.3 × 0.03 = 0.009

The mass of the flower is 0.009 kilogram.
8 0
3 years ago
Given two points what’s the slope intersect form (-3, 7) and (1, -1)
UNO [17]
Change in y over the change in x
-1-7=-8
1- -3=4

-8 divided by 4

Slope=-2
5 0
3 years ago
Hamburger: $6.00<br> Fries: $2.00<br> Tax: 7%<br> Tip: 20%<br><br> Total: ___
Salsk061 [2.6K]

Answer:

$10.27

Step-by-step explanation:

H + F = $8, (7% of 8 is 0.56) [$8.56] + 20% = 10.272 --> $10.27

3 0
3 years ago
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