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Tanya [424]
3 years ago
10

Find the area of the triangle. please explain/show your work. thank you <3

Mathematics
1 answer:
bonufazy [111]3 years ago
4 0
BC = a
AC = b
ACB = C

To find the area of such triangle we are going to use the formula;

1/2 * a * b * sine C

Substitute values.

1/2 * 4 * 4 * sine 45
= 5.65^2

Therefore the area of the triangle is 5.65^2
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If x+y=5,x-y=4,find the value of x²-y²​
inysia [295]

Answer:

20

Step-by-step explanation:

→ First find the value of x and y

x + y = 5

x - y = 4

→ Add the equations to cancel out the y's

2x = 9

→ Divide both sides by 2 to find the value of x

x = 4.5

→ Substitute x = 4.5 back into x - y = 4 to find the value of y

4.5 - y = 4

→ Minus 4.5 from both sides to isolate -y

-y = -0.5

→ Multiply everything by -1

y = 0.5

→ Substitute x = 4.5 and y = 0.5 into x² - y²

4.5² - 0.5² = 20.25 - 0.25 = 20

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3 years ago
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Aleks04 [339]

Answer:

1. x = 21

2. x = 19

Step-by-step explanation:

Since the interior angles of all quadrilaterals add up to 360, all we have to do is add them up and set them equal to 360. Combine like terms and we get

7x + 213 = 360

Which further turns to 7x = 147

So x = 21

For the second problem, it's the same thing

By the end we get 2x + 8 = 46

2x = 38

x = 19

Hope this helps

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Step-by-step explanation:

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A muffin recipe calls for 3 cups of flour for 24 muffins. If you want to make 108
vladimir2022 [97]

Answer:

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Step-by-step explanation:

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3 years ago
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