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3 years ago

1+4=5 2+5=12 3+6=21 8+11=

Mathematics

2 answers:

Naily [24]3 years ago

6 0

21+8+11 equals to 40.
40 is your answer

ICE Princess25 [194]3 years ago

6 0

1 + 4 = 5

2 + 5 = 7 but you have to add the 5 from the previous addition problem, and it'll give you 12

3 + 6 = 9 but you have to add the 12 from the previous addition problem, and it'll give you 21

If you continue the pattern (4+7, 5+8, 6+9, 7+10) then 8 + 11 will be 96.

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2 years ago

The sum of the numerator and the denominator of the certain fraction is equal to 4,140. When the fraction was reduced, the resul

Sunny_sXe [5.5K]

Answer:

1449/2691

Step-by-step explanation:

We must start from the fraction that is 7/13. Now, we know that it was simplified, with trial and error we can reach the result.

First, let's multiply both by 200:

7 * 200 = 1400

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It means that we are missing 140, to reach the objective, that is, we are close, let's try 205 now:

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3 0

3 years ago

A shopkeeper allows 15% discount on the marked price, still he manages to have 7% profit. How much high did he mark his goods ab

lianna [129]

Answer: $25.9\%$

Step-by-step explanation:

Given

Shopkeeper allows 15% discount on the marked price and still manages a profit of 7%

Suppose the marked price is $x$

So, the selling price is $(1-0.15)x=0.85x$

Suppose the cost price is $y$

$\Rightarrow \dfrac{0.85x-y}{y}=7\%\\\\\Rightarrow \dfrac{0.85x}{y}-1=0.07\\\\\Rightarrow \dfrac{0.85x}{y}=1.07\\\\\Rightarrow y=\dfrac{0.85x}{1.07}\\\\\Rightarrow y=0.794x$

So, the percentage the shopkeeper marked his goods above cost price

$\Rightarrow \dfrac{x-y}{y}\times 100\\\\\Rightarrow \dfrac{x-0.794x}{0.794}\times 100\\\\\Rightarrow \dfrac{0.2056}{0.794x}\times 100\\\\\Rightarrow 25.89\%\approx 25.9\%$

6 0

3 years ago