1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
GREYUIT [131]
3 years ago
8

I need help on 1-6 and If you can, can you explain how to do these? I'm not entirely sure how to.

Mathematics
1 answer:
gayaneshka [121]3 years ago
7 0
1. Using c=2pi(r), plug in 7 for r and solve. Then using a=pi(r)^2, plug in 7 for r once again and solve.

2. First, the diameter (d) is 12 so to get the radius (r), divide 12 by 2 and you should get 6. Then use c=2pi(r) for circumference and a=pi(r)^2 for area to solve.

3. To get the area of the semicircle, divide 16 by 2 to get the radius (r), plug it into a=pi(r)^2, and divide the answer you get for a by 2. To get the area of the triangle, use a=1/2bh, plugging in 16 for b and 10 for h. Finally, add your two answers (the a's from the semicircle and triangle problems).

4. Multiply 20 by 5.5 to get the area of the triangle. Then multiply 4.5 by 20 to get the area of the parallelogram and add your two quotients.

5. Use a=1/2bh and plug in 4 for b and 3 for h and solve. Then multiply the quotient by 10 and there's your volume. To find the surface area, solve SA=(10×4)+(10×3)+(10×5)+12. All I did there was find the area of all the sides and added them together.

6. To find the triangle's volume, use a=1/2bh (b=4, h=1.5) and then multiply the quotient of that by 2.5. To find the rectangle's volume, use v=lwh (l=4, w=2.5, h=2) and solve. Finally, add the triangle's volume and the rectangle's volume to get the total volume. To get its surface area, start with the rectangle. Find the areas of all the sides and add them together but then subtract the 2.5×4 rectangle as it is not on the surface. It should look like this: SA=2(4×2)+2(2.5×2)+10. Again, all I did was find the areas of all the rectangle's sides on the surface and added them. Next, find the triangle's areas on the surface and it should look like this: SA=2(1.5×4)+2(2.5×2.5). Finally, add both values of SA from the triangle and rectangle and there's your surface area.
You might be interested in
Solve 10 X + 8 / 2 X + 7 is equal to 4 ​
ale4655 [162]

Answer:

x = 10

Step-by-step explanation:

\frac{10x + 8}{2x + 7}  = 4

or, 10x + 8 = 4(2x + 7)

or, 10x + 8 = 8x + 28

or, 10x - 8x = 28 -8

or, 2x = 20

or, x = 20/2

or, x = 10

x = 10

4 0
2 years ago
The picture shows the $481 four friends worked together to earn.
makkiz [27]

Answer:

for what you have you need to add one more $10 bill.

or make it total $120.25

good luck!!

5 0
3 years ago
The point P(x,y) lies in the terminal side of an angle theta= -60° in standard position. What are the signs of the values of x a
Molodets [167]

Answer:

Step-by-step explanation:

x is positive and y is negative

5 0
3 years ago
Read 2 more answers
How do you convert 21.76 into a fraction
Bezzdna [24]

Answer:

21 19/25

Step-by-step explanation:

21 76/100

divide 76 and 100 by 4

21 19/25

4 0
3 years ago
6. A pizza's original price is $11. It is on sale for $9.25. What percent off is it?
wolverine [178]

Solution:

<u>We know that:</u>

Original \ price = \$11

Sale \ price = \$9.25

\frac{9.25}{11} + \frac{1.75}{11} =100\%

<u>Simplify the equation to find the percent off:</u>

\frac{9.25}{11} + \frac{1.75}{11} =100\%

84\% + \bold{16\%} = 100\% \space\ \space\ \space\ \ \ \ \ [Rounded]

This means that the <u>original price</u> has decreased about 16%.

4 0
3 years ago
Other questions:
  • Given two dependent random samples with the following results:
    7·1 answer
  • What is the value of the expression below plz help!
    8·1 answer
  • Please help meeeeeeeeeee
    14·1 answer
  • 2/3a - 1/6 = 1/3 Please I need help ASAP
    7·1 answer
  • HELP A GIRL OUT PLEASE!!
    8·1 answer
  • HELP ASAP!! please help me answer 2 and 5.
    13·1 answer
  • HELP ASAP!!!! HELP FAST PLEASE!!
    14·1 answer
  • 3-4(12 divided by 6)
    10·2 answers
  • Help I’m so bad at math
    15·1 answer
  • Please help pleaseeee please now help
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!