MATHEMATICS HIGH SCHOOL

Figure PQR is an equilateral triangle with a semicircle added to its base.What is the perimeter of figure PQR? Use 3.14 to approximate pi.

Answers

Answer 1

Answer:

Perimeter of the figure PQR is 91.42 cm.

What is Perimeter?

Perimeter of a straight sided figures or objects is the total length of it's boundary

Given figure PQR consists of an equilateral triangle and a semicircle.

Length of side of an equilateral triangle = 20 cm

Perimeter of equilateral triangle = sum of the length of three sides

Perimeter = 3 × 20 = 60 cm

Now circumference of a circle = 2πr, where r is the radius.

Here there is a semicircle, which is the half of the circle.

Circumference of semicircle = 2πr / 2 = πr

Here Diameter = 20 cm

Radius = 20 / 2 = 10 cm

Perimeter of semicircle = 10π = 31.42 cm

Total perimeter = 60 cm + 31.42 cm = 91.42 cm

Hence the total perimeter is 91.42 cm.

Learn more about Perimeter here :

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Answer 2

Answer: 71.4. you add the two faces of the triangle with half of the circumference of a circle of radius 10

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Round 7,639,552 to the nearest ten thousand

Answers

The nearest ten thousand is:
7,640,000.

The ten thousand digit in 7 639 552 is 9. After the 9, the next digit is 5, so we round up the 9.

≈ 7 640 000 to the nearest ten thousand digit.

Which of the following statements shows the distributive property?5 + (4 – 2) = 20 – 10

5(4 – 2) = 20 – 10

5 + (4 – 2) = 9 + 3

5(4 – 2) = 9 – 7

Answers

Answer:

$\displaystyle 5(4 - 2) = 20 - 10$

This is a genuine statement of you look real closely at it.

I am joyous to assist you anytime.

Which expression is equivalent to 27 + 45?8(3 + 6)
8(19 + 37)
9(3 + 5)
9(18 + 36)

Answers

Answer:

9 (3 + 5)

Step-by-step explanation:

The given expression is 27 + 45

We can write both terms in factored form as

9×3 + 9×5

Now, since 9 is in both the factors. Hence, we can factored out 9

Factored out 9, we get

9 (3 + 5)

Therefore, the equivalent expression for 27 + 45 is 9 (3 + 5)

Answer:

9 (3 + 5) is the answer.

Helppppppppppppppppppppppppp

Answers

I’m pretty sure the answer is 1
I wouldn’t double check that tho
Sorry

Write 3.72x10^7 in standard notation

Answers

$3.72 * 10^7 = 3\underbrace{7,200,000}\n~~~~~~~~~~~~~~~~~~~~~~~~~~7\n\n\n\n3.72 * 10^7 = \boxed{\bf{37,200,000}}$

Since the exponent 7 is positive, you would move the decimal 7 places to the right. So the answer is 37200000.

If t+8=-12 what's the value of t + 1

Answers

To find out what t + 1 is, we first must find out the value of t.
We know that t + 8 = -12, so all we need to do to solve for t is subtract 8 from both sides.

t + 8 = -12

t + 8 - 8 = -12 - 8

t = -20

So now that we know the value of t, all we need to do to find t + 1 is insert the value of t into the variable and solve.

t + 1 = ?

-20 + 1 = ?

-19

And there we have it.
t + 1 = -19
Hope that helped! =)

the reason it gives us t + 8 = -12 is because they want us to figure out what t is. this is very simple trust me:) given our problem.
t + 8 = -12 what we have have to do here is isolate t alone. lets subtract 8 from both sides.
t + 8 = -12
- 8 = - 8 the 8 on the left hand side of the equal side is canceled out! and we have to subtract 8 from -12. lets do the math:)
-12 - 8 = -20 well lets see what we have left of our problem.
t = -20
hey we have our answer we know that t = -20
but the question is asking us to find the value of t + 1
well lets plug -20 for t
-20 + 1 = -19 since we are adding 1 it moves plus 1 towards the number zero.
so whats the answer? you may be asking..
-19
have a good one :)

merry christmas:D

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