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3 years ago

73=( 3)/(43) Need to find the missing number before the 3

Mathematics

1 answer:

Butoxors [25]3 years ago

3 0

Answer:

the missing number is 84

Step-by-step explanation:

Let the missing number be represented by N. Then we have ...

7*3 = N*3/(4*3)

Canceling common factors on the right, we have ...

7*3 = N/4

Multiplying by 4 gives ...

4*7*3 = N = 84

The missing number is 84.

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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

Make x the subject of the formula х +12c = 5d 63

dezoksy [38]

X=5db^3-2cb^3
Workup in photo below.
Good luck

7 0

3 years ago

An airplane flew for 4 hours at a speed of a miles per hour (mph), and at (x + 10) mph for next 4 hours. What expression can be

Akimi4 [234]

Answer:

I think it would be C in my cass

Step-by-step explanation:

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2 years ago

8(3n + 5) = -32 what does n =

olga_2 [115]

Answer: n = -3

Step-by-step explanation:

8(3n + 5) = -32

Divide both sides by 8.

(3n + 5) = -4

Subtract 5 by both sides.

3n = -4 - 5

3n = -9

Divide both sides by 3.

n = -3

8 0

2 years ago

What is 3 In 3 - In 9 expressed as a single natural logarthm? in 3 In 6 In 18 In 27

topjm [15]

Step-by-step explanation:

$3 \: In \: 3 - In \: 9 \\ = 3 \: In \: 3 - In \: {3}^{2} \\ = 3 \: In \: 3 - 2In \: {3} \\ = (3 - 2)In \: 3 \\ = In \: 3 \\$

Thus first option is the correct answer.

8 0

3 years ago

7*3=( *3)/(4*3) Need to find the missing number before the *3

73=( 3)/(43) Need to find the missing number before the 3