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3 years ago

What equation is equvalent to 11-4(78)

Mathematics

1 answer:

natali 33 [55]3 years ago

3 0

Answer:

11-4(78)

dominance of solving this question

first solve () =brackets

second solve / (division)

third solve x (multiplication)

forth solve + (addition)

Fifth solve - (subtraction)

11-4(78)

11-312

301

Step-by-step explanation:

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5. x2 +5x-4 Discriminate

ikadub [295]

Answer:

D = 41

Step-by-step explanation:

y = ax² + bx + c

The discriminant D = b² - 4ac tells the types of roots the equation has.

If D < 0 , then quadratic equation has no real roots, has two imaginary roots.

If D = 0 , then quadratic equation has one real root.

If D > 0 , then quadratic equation has two distinct real roots.

~~~~~~~~~~~~

x² + 5x - 4

a = 1, b = 5, c = - 4

D = 5² - 4(1)(- 4) = 25 + 16 = 41

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3 years ago

Lisa's store collects 5% sales tax on every item sold. If a customer's total purchase was $440, how much was the total before ta

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Answer: $418

Step-by-step explanation:

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3 years ago

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Is 1/3 lap per minute a unit rate

Lyrx [107]

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3 years ago

Find the length of side x simplest radical form with a rational denominator

Nuetrik [128]

Answer:

The length of x in the simplest radical form with a rational denominator will be:

$x=\frac{5\sqrt{3}}{2}$

Step-by-step explanation:

Given

hypotenuse = 5

angle Ф = 60°

To determine

x = ?

Using the trigonometric ratio

cos Ф = adjacent / hypotenuse

here

Ф = 60°

adjacent of 60° = x

hypotenuse = 5

so substituting Ф = 60°, adjacent = x and hypotenuse = 5 in the equation

cos Ф = adjacent / hypotenuse

$cos\:60^{\circ }\:=\:\frac{x}{5}$

$\frac{\sqrt{3}}{2}=\frac{x}{5}$

switch sides

$\frac{x}{5}=\frac{\sqrt{3}}{2}$

Multiply both sides by 5

$\frac{5x}{5}=\frac{5\sqrt{3}}{2}$

Simplify

$x=\frac{5\sqrt{3}}{2}$

Therefore, the length of x in the simplest radical form with a rational denominator will be:

$x=\frac{5\sqrt{3}}{2}$

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3 years ago

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kirill115 [55]

Approximately 2.66 I think

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