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katrin [286]
2 years ago
9

Find the perimeter of the following regular polygons 1.An equilateral when the length of one side is 3.5cm​

Mathematics
1 answer:
devlian [24]2 years ago
7 0
P=10.5cm
Explanation:
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The given line passes through the points (−4, −3) and (4, 1).
dimulka [17.4K]
1+3/4+4
4/8
1/2
y-3=-2(x+4)
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5 0
2 years ago
Identify the exact value of 157.5°
steposvetlana [31]
<span>exact value of sin 157.5 without using a calculator
sin(157.5)=sin(315/2)
Identity: sin(x/2)=±√[(1-cosx)/2]
select positive identity since 175 is in the 2nd quadrant where sin>0
sin(315/2)=√[(1-cos315)/2]

cos 315=cos45 in quadrant IV=√2/2
sin(315/2)=√[(1-√2/2)/2]=√[(2-√2)/4]=√(2-√2)/2
sin(157.5)=√(2-√2)/2
check using calculator:
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√(2-√2)/2≈0.382...</span>
8 0
3 years ago
If speed varies inversely as the time it takes to drive and Kris takes 5 hours driving at 55 mph, what speed will Martin need to
galina1969 [7]

Answer:

55mph

None of the option is correct

Step-by-step explanation:

Let v be the speed and t as the time taken. If speed varies inversely as the time it takes to drive, then v ∝ 1/t.

v = k/t where k is the constant of proportionality.

IF it takes Kris 5 hours when driving at 55 mph, then v = 55mph when t = 5 hours.

Substituting this values into the formula above;

55 = k/5

k = 55*5

k = 275mp/hr²

To calculate the speed it will Martin to  drive for 5 hours, we will substitute k = 275 and t = 5 into the original equation v = k/t

v = 275/5

v = 55 mph

<em>Hence, martin will also need to drive at 55mph to take 5 hours</em>

3 0
3 years ago
What is the equation of the line?
Rudik [331]

Answer: It’s B) y=-1/3x-2

Step-by-step explanation:

5 0
2 years ago
How do you find the area of a parallelogram if the base or height aren’t given?
postnew [5]

If height isn't defined/given you do the equation - h=A /b

If base isn't defined/given you do the equation - b=A /h

A=Area

B=Base

H=Height

5 0
2 years ago
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