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kozerog [31]
3 years ago
10

43 = 20 + z/3 please help

Mathematics
1 answer:
BabaBlast [244]3 years ago
3 0

Answer:

z = 69

Step-by-step explanation:

43 - 20 = z/ 3

23 = \frac{z}{3}

cross multiply

z = 23 x 3

z =69

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If the sum of the measures of the interior angles of a polygon is 1920°, how many sides does it have?
gizmo_the_mogwai [7]

Answer:

<u>The regular polygon has 13 sides</u>

Correct statement and question:

If the sum of the measures of the interior angles of a polygon is 1980°, how many sides does it have?

Source:

1,920° is not a valid value for a regular polygon. It should be either 1,980° or 1,800° (it has to be a multiple of 180). We pick 1,980° to answer the question.

Step-by-step explanation:

Let's recall that the formula of the sum of the interior angles of any polygon is:

Sum of Interior Angles = (n-2) * 180°, where n is the number of sides of the polygon.

Therefore, replacing with the value we know:

1,980 = (n-2) * 180

n - 2 = 1,980/180

n - 2 = 11

<u>n = 13</u>

7 0
3 years ago
Kelli and Karl each have a job. Kelli earns $20 an hour. She also receives a $100 weekly bonus.
Firlakuza [10]
Answer:   When they work 10 hours each, they both make $300.

kelli    y = 20x + 100
karl    y = 25x + 50

substitution:

y = 20x + 100

25x + 50 = 20x + 100
-20x  -50    -20x   -50
--------------------------------
5x = <span>50 
</span>5       5

x = 10

(Then plug into any equation)
y = 25x + 50
y = 25(10)  + 50
y = 300

When they work 10 hours each, they both make $300.


5 0
3 years ago
20points!!!! 3 2/3 + 2.3 =
Slav-nsk [51]
5.96666 or 6 because if you round it that’s what it’ll be
6 0
3 years ago
If 3x-2=2x+4 what does x equal
Burka [1]

Answer:

6

Step-by-step explanation:

To solve for x you must isolate it.

3x-2=2x+4

-2x -2x Subtract 2x from both sides

x-2=4 Your left with this

+2 +2 Then add 2 to both sides

x=6 x equals to 6

7 0
2 years ago
Find the area of the isosceles triangle.
Zina [86]
Try this thing which you can find on internet

4 0
3 years ago
Read 2 more answers
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