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Andru [333]
3 years ago
12

Use exterior angles to show that the angle sum of quadrilateral PQRS is 360°.​

Mathematics
1 answer:
Shkiper50 [21]3 years ago
8 0

Answer:

I don't really know but one triangle is 180 degrees so two added together is 360 degrees...

but ohh I remembered

a=c+d (since a+b=180 and c+d+b=180)

e=g+h (since e+f=180 and g+h+f= 180)

and the fact is that c+d+g+h+b+f=the angle sum of quadrilateral PQRS

a+e+b+f= the angle sum of quadrilateral PQRS (by substitutions)

a+e+b+f=360 (four angles are from one origin so it's 360 degrees )

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Andrew has three times as many pencils as Noah and five pens he has 17 pens and pencils altogether how many pencils does Noah ha
Novay_Z [31]

9514 1404 393

Answer:

  4

Step-by-step explanation:

The distributive property does not appear to be involved in this question.

Let n represent the number of Noah's pencils. Then Andrew's total is ...

  3n +5 = 17

  3n = 12 . . . . . subtract 5 from both sides

  n = 4 . . . . . .  divide both sides by 3

Noah has 4 pencils.

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2 years ago
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X=12.5
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3 years ago
QUESTION NUMBER ONE
Mashutka [201]

Answer:

$68.85

Step-by-step explanation:

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5 0
3 years ago
You are buying a party pack of chips for $14.50 with a 3% tax. How much do you pay in total?
myrzilka [38]

Answer:

Step-by-step explanation:

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6 0
2 years ago
Read 2 more answers
What are the possible values of x if (4x - 5)2 = 49? Check all that apply.<br> uw we we
kogti [31]

Answer:

x = - \frac{1}{2}, x = 3

Step-by-step explanation:

Given

(4x - 5)² = 49 ( take the square root of both sides )

4x - 5 = ± \sqrt{49} = ± 7 ( add 5 to both sides )

4x = 5 ± 7, thus

4x = 5 - 7 = - 2 ( divide both sides by 4 )

x = \frac{-2}{4} = - \frac{1}{2}

or

4x = 5 + 7 = 12 ( divide both sides by 4 )

x = 3

As a check

Substitute these values into the left side of the equation and if equal to the right side then they are the solutions.

x = - \frac{1}{2}

left side = (- 2 - 5)² = (- 7)² = 49 = right side ⇒ solution

x = 3

left side = (12 - 5)² = 7² = 49 = right side ⇒ solution

7 0
3 years ago
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