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3 years ago

Please answer 14 and 13

Mathematics

2 answers:

Colt1911 [192]3 years ago

7 0

7/4 * 301/2 (changed into mixed numbers)
2107/8
263.375
C
because when you change 3 into a mixed fraction its 263*8+3/8
263.375
#1

sasho [114]3 years ago

7 0

13: I would convert 1 3/4 to 1.75 percent. Then, change 150 1/2 to 150.50. Multiply those:
150.50
x 1.75
263.375. Convert that into a fraction which equals 263 3/8, making the answer (C), 263 3/8.

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3 years ago

john has us and foreign stamps in his album. the ratio of the numer of us stamps to foreign stamps is 5:2. after paul gives him

VLD [36.1K]

Answer:

The number of U.S stamp he has is 120.

Step-by-step explanation:

John has us and foreign stamps in his album. the ratio of the number of U.S stamps to foreign stamps is 5:2.

After Paul gives him 12 foreign stamps the ratio becomes 2:1.

Now, to find the number of U.S stamps.

Let the U.S stamps be $x.$

And the foreign stamps be $y.$

Now, to solve by using cross multiplication method:

So, the ratio is:

$\frac{x}{y} =\frac{5}{2}$

By cross multiplying we get:

$2x=5y$

Dividing both sides by 2 we get:

$x=\frac{5y}{2}$ ......(1)

Now, after Paul gives him 12 foreign stamps the ratio becomes:

$\frac{x}{12+y} =\frac{2}{1}$

By cross multiplying we get:

$x=24+2y$

Putting the value of $x$ as we get in above equation (1):

$\frac{5y}{2} =24+2y$

Multiplying both sides by 2 we get:

$5y=48+4y$

Subtracting both sides by 4y we get:

$y=48.$

The number of foreign stamps = 48.

Now, to get the number of U.S stamps by putting the value of $y$ in equation (1):

$x=\frac{5\times 48}{2}$

$x=\frac{240}{2}$

$x=120.$

Therefore, the number of U.S stamp he has is 120.

7 0

4 years ago

<img src="https://tex.z-dn.net/?f=R%5E8xR%5E6" id="TexFormula1" title="R^8xR^6" alt="R^8xR^6" align="absmiddle" class="latex-for

Nina [5.8K]

Answer:

R^14

Step-by-step explanation:

Formula : -

a^m x a^n = a^( m + n )

Here,

a = R

m = 8

n = 6

R^8 x R^6

= R^( 8 + 6 )

= R^14

5 0

3 years ago