3 years ago

Which of these expressions are equivalent???

Mathematics

1 answer:

Usimov [2.4K]3 years ago

7 0

50% and 5/10 are equal to each other bc u have to simplify

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The golden ratio is a solution to a quadratic equation.

Crank

Answer:

Below.

Step-by-step explanation:

a. Φ^2 − Φ − 1 = 0

Φ2 − Φ = 1

(Φ - 0.5)^2 - 0.25 = 1

(Φ - 0.5)^2 = 1.25

Φ - 0.5 = √(1.25) (We only take the positive root).

Φ = 0.5 + √(1.25)

b. I used Completing the square.

c. Φ is irrational That is it cannot be represented as a fraction a/b and because of this it can only be approximated by a decimal.

6 0

3 years ago

Bethany paid $408.75 for a pair of diamond stud earrings. The sale price was $375. What is the Percent of Sales Tax she paid for

9966 [12]

Answer:

She paid 9% of sales tax

Step-by-step explanation:

The sale price of diamond = $375

Let x be percent of sales tax

So, amount of tax = $x\% \times 375 = \frac{x}{100} \times 375 =3.75x$

So, Amount including tax = 375+3.75x

We are given that Bethany paid $408.75 for a pair of diamond stud earrings.

So, 375+3.75x=408.75

3.75x=408.75-375

$x=\frac{408.75-375}{3.75}$

x=9

Hence She paid 9% of sales tax

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4 years ago

5/2x-3 is this a monomial, binomial, or trinomial

Serga [27]

Its a binomial. There are two terms

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3 years ago

Diameter of a circle is two units. What is the radius of the circle?

bonufazy [111]

Answer is 3.5 feet enjoy

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3 years ago

What's 3.318 divided by 0.07? <br><br>THIS IS HOMEWORK AND IT'S DUE IN 2 DAYS

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The answer is ...............47.4

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3 years ago

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