Find the value of x. A.)x=5 B.)x=10 C.)x=14 D.)x=16

bonufazy [111]

The best way to solve this is to find a common denominator! Don't worry, it's super easy

Take 4 1/5 and change it to a single fraction by multiplying 5(4) and adding the 1, then put it over 5 again. This gives you 21/5, which is equal to 4 1/5.

Then do the same thing with 2 1/2:
2(2) +1 over 2= 5/2.

The problem is asking you to subtract. So 21/5- 5/2.

So how can you subtract that? Easy: common denominators!
The smallest number that is divisible by both 2 and 5 is 10, so you want both numbers to have 10 on the bottom.

To do this, multiply 21/5 by 2/2 (Note: 2/2 is equal to 1, so you are not changing the value of the fraction, you're only changing how it is written).
This is 42/10.

Then multiply 5/2 by 5/5 for 25/10.

NOW you can finally subtract!

42/10 - 25/10 = 17/10

17/10 is your answer!!

(Think 42-25/10 if you're confused on how to subtract Fractions)

5 0

4 years ago

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Você precisa colocar suas renas, Raposa, Trovão, Cometa e Relâmpago, em uma fila única para puxar o seu trenó. No entanto, Comet

Gennadij [26K]

Answer:

If the reindeer do not fight, there are 5!=120 ways to line them up in a straight line.

Out of these, Bloopin and Rudy are together in 4!=24 times. Similarly Rudy and Bloopin will be together 4!=24 times. So the number of ways they are not together is 120-24-24=72 ways.

Hope this helps. :)

Step-by-step explanation:

Spanish:

Si los renos no luchan, hay 5! = 120 formas de alinearlos en línea recta.

De estos, Bloopin y Rudy están juntos en 4! = 24 veces. De manera similar, Rudy y Bloopin estarán juntos 4! = 24 veces. Entonces, el número de formas en que no están juntas es 120-24-24 = 72 formas.

Espero que esto ayude :)

4 0

3 years ago

Solve 2(x + 1) + 4 = 8

mel-nik [20]

Answer:

x=1

Step-by-step explanation:

2(x + 1) + 4 = 8

2x+2+4=8

2x+6=8

2x+6-6=8-6

2x=2

x=1

7 0

3 years ago

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Hey need help....heheheh Oki do u guys know wut 2.19 times 43.7 is......it's for a test -_-

Vikentia [17]

Answer:

95.703

Step-by-step explanation:

If you could subscribe to penny_pg3d that would be great :>

7 0

4 years ago

A certain model of automobile has its gas mileage (in miles per gallon, or mpg) normally distributed, with a mean of 28 mpg and

Dmitry_Shevchenko [17]

Answer:

Step-by-step explanation:

We are finding the probability, which is a percentage, of each of these intervals on our standard bell curve. In order to find this percentage, we need to find the z-score that provides this percentage. To find the z-score:

$z=\frac{x_i-\bar{x}}{\sigma}$ which is the number in question minus the mean, all divided by the standard deviation. We're first looking for the probability that the gas mileage on a certain model of car is less than 26 mpg.

To find this z-score:

$z=\frac{26-28}{4}=-.5$ Depending upon which table you look at for the z-score determines how you will find it. The z-score that measure from the value and to the left of it is what we need. This decimal is .3085375, or 30.8538%.

Onto b., which is for the percentage of cars that have gas mileage over 34 mpg. Find the z-score, and this time, we look to the right of the value for the percentage:

$z=\frac{34-28}{4}=1.5$ and to the right of 1.5 standard deviations we will find .0668072, or 6.68072%

Then finally c., which wants the probability that the gas mileage on one of these cars is greater than 22 but less than 34 mpg. To do this we have to find the z-scores of each and then do some subtracting. First the z-scores:

$z=\frac{22-28}{4}=-1.5$ The percentage of data that lies to the right of that z-score is .9331927

The z-score for the other value, 34, was already found as 1.5, having .0668072 of the data to the right of that z-score. We subtract the smaller from the larger to determine what's left in-between:

.9331972 - .0668072 = .86639, or as a percentage, 86.639% of the cars fall into this interval for gas mileage.

7 0

3 years ago