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3 years ago

100 POINTS PLEASE ANSWER IM BEGGING YOU!!!

Mathematics

2 answers:

Kazeer [188]3 years ago

5 0

Answer:

A (1/7)

Step-by-step explanation:The square root goes into 1 and 49 turning them into 1 and 7, which means it's a real number and u get A.

svetlana [45]3 years ago

3 0

Answer:

1/7

Step-by-step explanation:

If you multiply 1/7 by 1/7 you get 1/49. That is why it is the square root.

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The number 9 has only one prime factor, 3. What is another number less than 50 with only one prime factor?

blagie [28]

There is 15. 5x3=15 but nothing else equals 15

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3 years ago

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What is the fully simplified answer to sqrt(7/18) + sqrt(5/8) - sqrt(7/2)

NeX [460]

Answer:

$=\frac{-4\sqrt{7}+3\sqrt{5}}{6\sqrt{2}}$

Step-by-step explanation:

Given expression as:

$=\sqrt{\frac{7}{18}}+\sqrt{\frac{5}{8}}-\sqrt{\frac{7}{2} }$

We need to simplify the given expression.

Solution:

We have:

$=\sqrt{\frac{7}{18}}+\sqrt{\frac{5}{8}}-\sqrt{\frac{7}{2} }$

Rewrite the expression as:

$=\frac{\sqrt{7}}{3\sqrt{2}} - \frac{\sqrt{7}}{\sqrt{2}} +\frac{\sqrt{5}}{2\sqrt{2}}$

$\frac{\sqrt{7}}{\sqrt{2} }$ is a common factor to the first two terms.

Using distributive property we can factor out $\frac{\sqrt{7}}{\sqrt{2} }$ from the first two terms.

$=\frac{\sqrt{7}}{\sqrt{2}}(\frac{1}{3} -1) +\frac{\sqrt{5}}{2\sqrt{2}}$

$=\frac{\sqrt{7}}{\sqrt{2}}(\frac{1-3}{3}) +\frac{\sqrt{5}}{2\sqrt{2}}$

$=\frac{\sqrt{7}}{\sqrt{2}}(\frac{-2}{3}) +\frac{\sqrt{5}}{2\sqrt{2}}$

$=-\frac{2\sqrt{7}}{3\sqrt{2}} +\frac{\sqrt{5}}{2\sqrt{2}}$

$\sqrt{2}$ is common factor, so we can factor $\sqrt{2}$ from the above expression.

$=\frac{1}{\sqrt{2} }( -\frac{2\sqrt{7}}{3} +\frac{\sqrt{5}}{2})$

$=\frac{1}{\sqrt{2} }( \frac{-2\times 2\sqrt{7}+3\times \sqrt{5}}{6})$

$=\frac{1}{\sqrt{2} }( \frac{-4\sqrt{7}+3\sqrt{5}}{6})$

$=\frac{-4\sqrt{7}+3\sqrt{5}}{6\sqrt{2}}$

Therefore, we get simplified answer as.

$=\frac{-4\sqrt{7}+3\sqrt{5}}{6\sqrt{2}}$

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3 years ago

A tile installer has selected four different size square tiles to cover a floor. The areas of the tiles are:

snow_lady [41]

Answer:

C and D

Step-by-step explanation:

The length of the sides will be irrational if it is not a whole number. The tile installer has a square shape, so the formula for area is

area= $side^{2}$

Since we need to find if the side has the whole number, we can make the function to solve for side

side= $\sqrt{area} }$

Then the side for each tile installer will be:

A= $\sqrt{25 in^{2} }$ = 5 inch

B= $\sqrt{36 in^{2} }$ = 6 inch

C= $\sqrt{46 in^{2} }$ = 6.78 inch

D= $\sqrt{60 in^{2} }$ = 7.74 inch

Both C and D have irrational sides

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3 years ago

student tickets for a football game cost $2 each. adult tickets cost $4 each. ticket sales at last week's game totaled $2800. wr

ELEN [110]

Answer:

Let s = students

Let a = adults

2s + 4a = 2800

Step-by-step explanation:

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3 years ago

Solve: 4x -2 = 2x +3

andre [41]

Answer:

x=5/2

Step-by-step explanation:

4x-2=2x+3

1) Add 2 to both sides:

4x=2x+5

2) Subtract 2x from both sides:

2x=5

3) Divide both sides by 2:

x=5/2

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3 years ago

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