2 years ago

Help please numbers 12, 13, 14, 15please show work

Mathematics

1 answer:

kari74 [83]2 years ago

5 0

Those are the answers for 12,13,14,15

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Simplify 2√2-√3 --------------- √2+√3

serious [3.7K]

Step-by-step explanation:

$= \frac{2 \sqrt{2} - \sqrt{3} }{ \sqrt{2} + \sqrt{3} }$

$= \frac{2 \sqrt{2} - \sqrt{3} }{ \sqrt{2} + \sqrt{3} } \times \frac{ \sqrt{2} - \sqrt{3} }{ \sqrt{2} - \sqrt{3} }$

$= \frac{ 2( \sqrt{2} - \sqrt{3} )( \sqrt{2} - \sqrt{3} )}{ { \sqrt{2} }^{2} - { \sqrt{3} }^{2} }$

$= \frac{2(2 - \sqrt{6} - \sqrt{6} - 3) }{2 - 3}$

$= \frac{2( - 1 - 2 \sqrt{6} )}{ - 1}$

$= \frac{ - 2(1 + 2 \sqrt{6} )}{ - 1}$

$= 2(1 + 2 \sqrt{6} )$

$= 2 + 4 \sqrt{6}$

6 0

1 year ago

Use mental math to find the difference. 532-116

ExtremeBDS [4]

Answer:

416

Step-by-step explanation:

4 0

2 years ago

Read 2 more answers

Suppose that you have an enormous grapefruit that is 92% water (by weight). The grapefruit weights 100 pounds. If the water cont

yuradex [85]

Answer:

The weight of grapefruit is now 80 pound.

Step-by-step explanation:

Consider the provided information.

Let the x is the weight loss. The weight of grapefruit is 100 pounds and water is 92%. After evaporation water is 90%.

Thus the weight loss is:

$0.92\times100-0.90(100 - x) = x$

$92-90+0.90x=x$

$2=x-0.90x$

$2=0.1x$

$x=20$

Hence, the weight loss is 80 pounds.

Therefore, New weight is 100 - 20 = 80 pounds

The weight of grapefruit is now 80 pound.

3 0

2 years ago

A number has the digits 1, 9 and 5 to the nearest 100 the number rounds to 600. What is the number?

mars1129 [50]

Answer:

591

Step-by-step explanation:

the closest number to 600 out of every combo

195

159

951

915

519

591

4 0

3 years ago

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A gallon of water weighs 8.354 pounds Simon uses 11.81 gallons of water while taking a shower about how many pounds of water did

krek1111 [17]

Simon used about 98.66 pounds

8 0

3 years ago