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3 years ago

Find the value of the variable.

Mathematics

1 answer:

Step2247 [10]3 years ago

4 0

Answer:

sin 30=14/x

x=14*2

x=28

and

x=√{28²-14²}

x=14√3

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How manyy solutions does this system of equations have? explain how you know y + 2x = 5 y = 3x + 5

tigry1 [53]

Answer:

(-5, -10)

Step-by-step explanation:

y+2x = 5y

==>2x=4y

x=2y

5y=3(2y)+5

==>

y = -5

x = -10

==>

one solution

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3 years ago

Which statement best describes the relationship between the two variables?

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3 years ago

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Eight expressions are given below. Determine whether each expression is equivalent to 5^10 or not equivalent to 5^10.

KengaRu [80]

Answer:

See Explanation

Step-by-step explanation:

The question is incomplete, as the 8 expressions are not given.

The general explanation is as follows

As complex as an expression may seem, you have to simplify each expression until it cannot be further simplified.

Then you categorize each result, depending on if it equals $5^{10}$ or not

Take for instance:

$5^5 * 5^5$

Using law of indices:

$5^5 * 5^5 = 5^{5+5$

$5^5 * 5^5 = 5^{10$ ---- equivalent

$\frac{5^5 + 5^5}{2 * 5^{-5}}$

Factorize the numerator

$\frac{5^5 + 5^5}{2 * 5^{-5}} = \frac{5^5(1 + 1)}{2 * 5^{-5}}$

$\frac{5^5 + 5^5}{2 * 5^{-5}} = \frac{5^5 * 2}{2 * 5^{-5}}$

Cancel out 2

$\frac{5^5 + 5^5}{2 * 5^{-5}} = \frac{5^5}{5^{-5}}$

Apply law of indices

$\frac{5^5 + 5^5}{2 * 5^{-5}} = 5^{5--5}$

$\frac{5^5 + 5^5}{2 * 5^{-5}} = 5^{5+5}$

$\frac{5^5 + 5^5}{2 * 5^{-5}} = 5^{10$ ---equivalent

$125 * 78125$

Express as exponent

$125 * 78125 = 5^3 * 5^7$

Apply law of indices

$125 * 78125 = 5^{3+7$

$125 * 78125 = 5^{10$ ---- equivalent

$5^3 + 5^7$

Solve exponents

$5^3 + 5^7 = 125 + 78125$

$5^3 + 5^7 = 78250$ ---- not equivalent

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3 years ago

What would the answer be to 1/2+1/8-1/4

Inga [223]

The answer for that equation will be 0.375.

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2 1/2 divided by -1 1/3

11111nata11111 [884]

Answer:

The answer is -1.879699

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