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Fittoniya [83]
2 years ago
6

A polygon has the following interior angle , (y+10); (y+20); (y+30); (y+40); (y+50);

Mathematics
1 answer:
MrRissso [65]2 years ago
8 0
Y=78
A polygon has a total of 5 interior angles
In order to find the total amount of angles in a shape you do (the amount of angles - 2)x180 degrees
(5-2(3))180
3x180=540
Add the numbers you know (10+20+30+40+50=150)
540-150=390 and there are 5y altogether so divide 390 by 5 which is 78
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The image of (-9,-4) after a reflection over the y-axis?
lidiya [134]

Answer:

The answer is (-4,9)

Step-by-step explanation:

When you reflect across y=-x the x and y coordinates switch places and change signs.

7 0
3 years ago
Please help me with this!!<br> Thank u
topjm [15]

Answer:

Step-by-step explanation:

Left

When a square = a linear, always expand the squared expression.

x^2 - 2x + 1 = 3x - 5                Subtract 3x from both sides

x^2 - 2x - 3x + 1 = -5

x^2 - 5x +1 = - 5                      Add 5 to both sides

x^2 - 5x + 1 + 5 = -5 + 5

x^2 - 5x + 6 = 0

This factors

(x - 2)(x - 3)

So one solution is x = 2 and the other is x = 3

Second from the Left

i = sqrt(-1)

i^2 = - 1

i^4 = (i^2)(i^2)

i^4 = - 1 * -1

i^4 = 1

16(i^4) - 8(i^2) + 4

16(1) - 8(-1) + 4

16 + 8 + 4

28

Second from the Right

This one is rather long. I'll get you the equations, you can solve for a and b. Maybe not as long as I think.

12 = 8a + b

<u>17 = 12a + b         Subtract</u>

-5 = - 4a

a = - 5/-4 = 1.25

12 = 8*1.25 + b

12 = 10 + b

b = 12 - 10

b = 2

Now they want a + b

a + b = 1.25 + 2 = 3.25

Right

One of the ways to do this is to take out the common factor. You could also expand the square and remove the brackets of (2x - 2). Both will give you the same answer. I think expansion might be easier for you to understand, but the common factor method is shorter.

(2x - 2)^2 = 4x^2 - 8x + 4

4x^2 - 8x + 4 - 2x + 2

4x^2 - 10x + 6    The problem is factoring since neither of the first two equations work.

(2x - 2)(2x - 3)     This is correct.

So the answer is D

5 0
3 years ago
Please answer! I give brainliest when I can! It make my day :-) ASAP :-(
hjlf

Answer:

A=1/2h(7+11) or A=1/2h(77)

The area is dependent on the height and the height changes based on the length of both of the bases

Step-by-step explanation:

7 0
3 years ago
Mr James spent $62.60 ordering sandwiches for his staff he tipped the delivery driver 20% how much did he spent altogether.
m_a_m_a [10]

Answer:

He spend 75.12

Step-by-step explanation:

First determine the amount of the tip

62.60 * 20%

62.60 *.20

12.52

Add this to the cost of the sandwiches

62.60+ 12.52

75.12

6 0
2 years ago
Read 2 more answers
3a+20=-25 what is the value of a?
frez [133]
3a+20=-25

Subtract 20 from both sides
3a=-45

Divide both sides by 3
a=-15

Final answer: a=-15
8 0
3 years ago
Read 2 more answers
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