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Sav [38]
2 years ago
6

Find the area of the circle. Use 3.14 for π. d = 10 cm A = [?] cm² A=TCr2

Mathematics
1 answer:
Stells [14]2 years ago
5 0

Answer:

78.5

Step-by-step explanation:

The diameter (d) is equal to the radius x 2, so take half of d to get r. Use r (5) in the equation to get your answer.

A= 3.12 x 5^2

A= 78.5

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Find x, y and z for the following triangle. ​<br>Please show the steps with details, Thanks!
Lubov Fominskaja [6]

Answer:

x = 100°

y = 125°

z = 55°

Step-by-step explanation:

A straight line is 180°

A triangle is 180°

Solve in this order:

X: 180 - 80 = 100

Z: 180 - 80 - 45 = 55

Y: 180 - 55 = 125

5 0
3 years ago
Can anyone help ?!<br> Please
Vaselesa [24]

Answer:

MARK AS BRAINLIST

Step-by-step explanation:

x=v*(y-3)

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6 0
3 years ago
A birthday celebration meal is $ 47.40 including tax, but not the tip. Find the total cost if a 15% tip is added to the cost of
Afina-wow [57]

Answer:

$54.51

Step-by-step explanation:

an easier way to do this is simply by multiplying 47.40x115%, which is 54.51.

another way to do this is by multiplying 47.40x15%, which is 7.11, then you'll have to added to 47.4, which gives you the same answer of 54.51

6 0
3 years ago
I need some help with this rational equation. It's supposed to = -1, but for some strange reason I keep getting x^2 +2x = -1.
Rasek [7]

This one is so easy that your brain refuses to accept it.
It's looking for a harder answer, but can't find it !

You're totally correct, as far you went.     x² + 2x does = -1

Now add ' 1 ' to each side:     x² + 2x + 1 = 0

Can you factor that quadratic ?
Can you mash it through the quadratic formula ?

Actually, it's the simplest possible perfect square.

                                       x² + 2x + 1  =  (x + 1)²

So the solutions of     x² + 2x + 1 = 0  are both   x = -1 .

Don't say anything.
I know it's embarrassing.

7 0
3 years ago
Use appropriate formulas from geometry to evaluate the integral. Write the exact answer. Do not round.
Leni [432]

Answer: ur answer is 8

Step-by-step explanation:

5 0
2 years ago
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