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3 years ago

5

How many sides do 1980 have

1 answer:

mel-nik [20]3 years ago

8 0

Answer:

13 sides

Step-by-step explanation:

1980 = (n − 2)×180 Formula for number of sides

n − 2 = 1980/180 Divide both sides by 180

n - 2 = 11

+ 2 + 2 Add 2 to both sides

n = 13

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Write a system of linear equations with -3,9 as its solution

lozanna [386]

Let the variable of the equation be x.

Solution of the equation is given to us, hence,

x = -3 and x = 9

x + 3 = 0 and x - 9 = 0

Multiplying,

(x + 3)(x - 9) = x² - 9x + 3x - 27 = x² - 6x - 27

Hence, the linear equation with solution -3 and 9 is x² - 6x - 27.

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4 years ago

Which choices are equivalent to the quotient below? Check all that apply.<br><br> √75/√15

Lubov Fominskaja [6]

The value of the fraction is $\rm \sqrt{5}$ , Option D is the correct answer.

The complete question is

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<h3>What is a Fraction ?</h3>

When a number is represented by p/q , where q ≠ 0 is called a fraction.

The given fraction is

$\rm \dfrac{\sqrt{75}}{\sqrt {15}}\\\\\\\\dfrac{\sqrt{3*5 *5}}{\sqrt {3*5}}\\\\\\\sqrt{5}\\$

Therefore , the value of the fraction is $\rm \sqrt{5}$ , Option D is the correct answer.

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2 years ago

Keisha had a bag of ribbons. she took 29 ribbons out of the bag. then there were 17 ribbon still in the bag. how many ribbons we

Len [333]

Total ribbons would be the sum of two numbers.

So, x = 29 + 17 = 46

In short, Your Answer would be: 46 ribbons

Hope this helps!

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3 years ago

Read 2 more answers

6. Multiply: (x – 4)(x + 5)

igor_vitrenko [27]

$\mathbb{PROBLEM}$

==========================================

$\tt{6. Multiply:}{ ( \times - 4)(x + 5)}$

==========================================

$\mathbb{ANSWER}$

$\tt{option. \: (d) \: \times 2 + \times - 20}$

==========================================

$\mathbb{SOLUTION}$

$\: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \tt{( \times - 4)( \times + 5)}$

$\: \: \: \: \: \: \: \: \: \: \: \: \: \tt= x(x + 5) -4(x + 5)$

$\: \: \: \: \: \: \: \: \: \: \: \: \: \tt{ = \times 2 + 5 \times - 4 \times - 20.}$

$\: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \tt\underline \red{= \: x2 + x - 20.}$

$\tt{Answe r \: is \: Option \: (d)}$

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3 years ago

What is the correct order of the numbers from least to greatest. 1/2, 0.6, 6%, 6/5

Anton [14]

Answer:

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Step-by-step explanation:

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