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trasher [3.6K]
3 years ago
13

The price of a plane ticket has increased from $150 to $200. By what percent has the price increased?

Mathematics
2 answers:
Genrish500 [490]3 years ago
4 0
There is a formula to figure out questions like this:

The price difference/ the original price and times the whole equation by 100 (to get the percentage).

> ($50/$150) x 100 = 33% (rounded)
White raven [17]3 years ago
4 0

Answer:

The answer is the option C

33\%

Step-by-step explanation:

we know that

\$150 ------> represent the 100\%

so

by proportion

Find what percent has the price increased

\frac{100}{150}\frac{\%}{\$}=\frac{x}{200-150}\frac{\%}{\$} \\ \\x=(200-150)*100/150\\ \\x=50*100/150\\ \\x=33.33\%

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A cashier has a total of 30 bills consisting of ones, fives and twenties. the number of twenties is 5 less than the number of on
Varvara68 [4.7K]

Let us say that:

a = ones

b = fives

c = twenties

 

So that the total money is:

1 * a + 5 * b + 20 * c = 229

=> a + 5b + 20c = 229                                       --> eqtn 1

 

We are also given that:

c = a – 5                                                                --> eqtn 2

a + b + c = 30                                                      --> eqtn 3

 

Rewriting eqtn 3 in terms of b:

b = 30 – a – c

Plugging in eqtn 2 into this:

b = 30 – a – (a – 5)

b = 35 – 2a                                                           --> eqtn 4

 

Plugging in eqtn 2 and 4 into eqtn 1:

a + 5(35 – 2a) + 20(a – 5) = 229

a + 175 – 10a + 20a – 100 = 229

11a = 154

a = 14

 

So,

b = 35 – 2a = 7

c = a – 5 = 9

 

Therefore there are 14 ones, 7 fives, and 9 twenties.

7 0
3 years ago
If x -1/7,evaluate x²+1/x²​
SCORPION-xisa [38]

Answer:

given \: x =  -  \frac{1}{7}

x {}^{2}  +  \frac{1}{x {}^{2} }

(  - \frac{1}{7} ) {}^{2}  +  \frac{1}{  (  - \frac{1}{7} ) {}^{2} }

\frac{1}{49}  +  \frac{1}{ \frac{1}{49} }

\frac{1}{49}  +  \frac{1 \times 49}{1}

\frac{1}{49}  + 49

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3 years ago
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xxTIMURxx [149]

Answer:

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Step-by-step explanation:

\frac{ {x}^{2} - 1 }{ x  + 1}

Let x = -5

[(-5)²-1]/(-5+1)

= (25-1)/(-4)

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AleksAgata [21]
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Step2247 [10]

Answer:

2

Step-by-step explanation:

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