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2 years ago

the sum of the measures of the interior angels of a convex polygon is 3240 classify the polygon by the number of sides

Mathematics

1 answer:

Ipatiy [6.2K]2 years ago

5 0

Answer:

20-gon

Step-by-step explanation:

First we start with the formula to find what the sum of angles will be if we know the number of sides.

S=(n-2)*180 where S is the sum of angles and n is the number of sides.

Normally you'd plug in n to find S, but you can do the opposite too.

3240=(n-2)*180

Let me know if you need help working it from here.

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Anybody know the answer to this problem be correct

REY [17]

Answer:

28 out of 40

2(20 - x)/40 for x questions wrong

Step-by-step explanation:

total points: 40

total Qs: 20

20-6 = 14

14/20 = 28/40

8 0

2 years ago

If a varies directly as the cube root of b and if a=3 and b=64.find the formula connecting the variables hence find b when a=15/

Liono4ka [1.6K]

Answer:

b = 125

Step-by-step explanation:

Given a varies directly as $\sqrt[3]{b}$ then the equation relating them is

a = k $\sqrt[3]{b}$ ← k is the constant of variation

To find k use the condition a = 3 , b = 64 , then

3 = k $\sqrt[3]{64}$ = 4k ( divide both sides by 4 )

$\frac{3}{4}$ = k

a = $\frac{3}{4}$ $\sqrt[3]{b}$ ← equation of variation

When a = $\frac{15}{4}$ , then

$\frac{15}{4}$ = $\frac{3}{4}$ $\sqrt[3]{b}$ ( multiply both sides by 4 to clear the fractions )

15 = 3 $\sqrt[3]{b}$ ( divide both sides by 3 )

5 = $\sqrt[3]{b}$ , then

b = 5³ = 125

6 0

2 years ago

Elena walked 20 minutes more than Lin. Jada walked twice as long as Elena. Jada walked for 90 minutes. The equation 2(x+20) = 90

alisha [4.7K]

Answer:

5 21 ²48⁴95839383838462901747493948

7 0

2 years ago

Read 2 more answers

Evaluate 2/3x -16 when x= 18<br>A.-6<br>B.-4<br>C.2<br>D.4

const2013 [10]

2/3 of 18 is 12
then 12- 16 is -4
SO B

8 0

2 years ago

Example:

Iteru [2.4K]

Answer:

Step-by-step explanation:

Brigitte is putting a border, so she needs a perimeter

P=2(L+W)=2L+2W= 2*12+2*14.5=24+29=53

3 0

3 years ago