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3 years ago

Solve.

Mathematics

2 answers:

e-lub [12.9K]3 years ago

7 0

Your answer would be A)-20! (:
Basically you simplify both sides of the equation, then isolate the variable (:
x

kirill115 [55]3 years ago

5 0

Add 7 to both sides : -6 = v

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Use the distributive property to write an equivalent expression <br><br> 5(6y - 5b + 1)

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Answer: 30y - 25b +5

Step-by-step explanation:

(look at attachment image fir explanation)

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3 years ago

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2 years ago

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3 years ago

Given x² - 16x + 4 = 0:

arsen [322]

PART A
General formula of quadratic equation
ax² + bx + c = 0
To find the discriminant of the quadratic equation shown above, use this following formula.
d = $\sqrt{b^{2}-4ac}$

There is a quadratic equation below
x² - 16x + 4 = 0
therefore
a = 1
b = -16
c = 4

Plug in the numbers to the formula
d = $\sqrt{b^{2}-4ac}$
d = $\sqrt{(-16)^{2}-4(1)(4)}$
d = $\sqrt{(256-16}$
d = $\sqrt{240}$

Simplify
d = $\sqrt{16*15}$
d = $4 \sqrt{15}$
The value of the discriminant is 4√15

PART B
If the discriminant is less than zero (negative), the quadratic equation has imaginary solution.
If the discriminant is equal to zero, the quadratic equation has only one solution.
If the discriminant is more than zero (positive), the quadratic equation has two real solutions.

Because the discriminant of the quadratic equation is 4√15 and it's positive, <u>the quadratic equation has two real solutions.</u>

4 0

4 years ago

Find the value of x in the triangle shown below

Anna007 [38]

Answer:

=72.52°

Step-by-step explanation:

We use sin rule: sinA/a = sinB/b

Angle 32 faces side 4

Angle x faces side 7.2

So,

sinx/7.2 = sin32/4

Cross multiply

4sinx = 7.2sin32

Divide both sides by 4

We have,

sinx = (7.2sin32)/4

sinx = (7.2 * 0.5299)/4

sinx = 3.8153/4

sinx = 0.9538

x = sin⁻¹(0.9538)

x = 72.52°

5 0

4 years ago

Read 2 more answers