3 years ago

What is the square root of 16 over 81

Mathematics

2 answers:

jek_recluse [69]3 years ago

5 0

Answer:0.4

Step-by-step explanation:

Dafna1 [17]3 years ago

3 0

Answer:

0.04938271604

Step-by-step explanation:

Hope this helps :)

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Write a function rule that represents the sentence. y is 4 less than the product of 7 and x.

goldenfox [79]

Answer:

ｙ = 7x - 4

just as it says in words

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2 years ago

What are the exact solutions of x2 − 5x − 7 = 0, where x equals negative b plus or minus the square root of b squared minus 4 ti

Marat540 [252]

Answer:

$x = \frac{5 + \sqrt{53}}{2}$ or $x = \frac{5 - \sqrt{53}}{2}$

Step-by-step explanation:

Given

$x^2 - 5x - 7 = 0$

Required

Solve for x using:

$x = \frac{-b \± \sqrt{b^2 - 4ac}}{2a}$

First, we need to identify a, b and c

The general form of a quadratic equation is:

$ax^2 + bx + c = 0$

So, by comparison with $x^2 - 5x - 7 = 0$

$a = 1$ $b = -5$ $c = -7$

Substitute these values of a, b and c in

$x = \frac{-b \± \sqrt{b^2 - 4ac}}{2a}$

$x = \frac{-(-5) \± \sqrt{(-5)^2 - 4 * 1 * -7}}{2 * 1}$

$x = \frac{5 \± \sqrt{25 +28}}{2}$

$x = \frac{5 \± \sqrt{53}}{2}$

Split the expression to two

$x = \frac{5 + \sqrt{53}}{2}$ or $x = \frac{5 - \sqrt{53}}{2}$

To solve further in decimal form, we have

$x = \frac{5 + 7.28}{2}$ or $x = \frac{5 - 7.28}{2}$

$x = \frac{12.28}{2}$ or $x = \frac{-2.28}{2}$

$x = 6.14$ or $x = -1.14$

4 0

3 years ago

1 + 1 = A- 3 B- 2 C- 1 D- 4

aliina [53]

Answer:

Step-by-step explanation:

because thats what I learned

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2 years ago

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-9(x+8)+81=13-10x what does x equal?

ankoles [38]

The answer to the problem is x= -4

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2 years ago

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-14x - 10x + 19x please answer

Anit [1.1K]

the answer is -5x :) I'm pretty sure

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2 years ago