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3 years ago

Using the quadratic formula to solve x2 = 5-x, what are the values of x?

Mathematics

2 answers:

Alexus [3.1K]3 years ago

8 0

Answer:

A) (-1 ± √21)/ 2

Step-by-step explanation:

Move all terms onto one side

$x^{2}$ = 5-x

$x^{2}$ + x - 5 = 0

Insert values into quadratic formula

a = 1 b= 1 c= - 5

[-b ± √( $b^{2}$ - 4ac)]/2a

[-1 ± √( $1^{2}$ - 4 (1(-5)]/ 2(1)

(-1 ± √21)/ 2

kodGreya [7K]3 years ago

5 0

Answer:

its the first choice, negative 1 plus or minus square root of 21 over 2

Step-by-step explanation:

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3 years ago

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Aleksandr-060686 [28]

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4 years ago

What angle has the same sine value between 0-180? as Sin 24

Inessa05 [86]

Answer:

$Sin156$

Step-by-step explanation:

Given

$Sin24$

Required

Find equivalent between 0 to 180;

Let 24 be represented by $\theta$

So, $\theta = 24$

From Trigonometry ratios;

$Sin\theta = Sin(180 - \theta)$ where $0\leq \theta \leq 180$

Recall that $\theta = 24$

So, we have to substitute 24 for $\theta$ in the above expression.

This gives

$Sin24= Sin(180 - 24)$

Subtract 24 from 180

$Sin24= Sin156$

Hence, the equivalent of $Sin24$ is $Sin156$

6 0

3 years ago

Write the standard form of the line that has a slope - 3/4 intercept of -2Include your work in your final answer Type your answe

lukranit [14]

Y = -3/4x - 2
Add 2 and subtract y
-3/4x - y = 2
No fractions or negative
Multiply all by 4
-3x - 4y = 8
Now multiply all by (-)
Solution: 3x + 4y = -8

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3 years ago

To find the height of a tower, a surveyor positions a transit the is 2 meters tall at a spot of 40 meters from the base of the t

Mrac [35]

The height of the tower roughly equals 41.421 meters.

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4 years ago