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
12345 [234]
2 years ago
13

i really really need help with all of these you don't have to show your work but please help me with at least some or all of the

m pls

Mathematics
1 answer:
svp [43]2 years ago
8 0

Answer:

Step-by-step explanation:

1. Rectangle + Semi-Circle

A = a*b + \frac{\pi r^{2}}{2}\\a=6, b=4, r=\frac{a}{2} = 3\\A = 24 + 4.5 \pi = 38.14 in^{2}\\

2. Large Rectangle - Small Rectangle

A = 15 * 5 -  6*3 = 75 - 18 = 57 in^{2}\\

3. Rectangle - Trapezoid

A = a * b - \frac{c+d}{2}h = 20*17 - 6 * \frac{6+12}{2} = 340 - 54 = 286 cm^{2}\\

4. The composite figure is a rectangle if the triangle is moved to left and fills the missing part

A = a * b = 10 * 9 = 90 m^{2}\\

5. Square - Triangle

A = A = a^{2} - \frac{b^{2}}{2} = 8 * 8 - \frac{4 * 4}{2} = 64 - 8 = 56 cm^{2}\\

6. Circle - Square

A = \pi r^{2} - a^{2} = 64 \pi - 12 * 12 = 64 \pi - 144 = 57.06 m^{2}

7. Square - Triangle

A = a^{2} - \frac{b*h}{2} = 15 * 15 - \frac{10 * 8}{2} = 225 - 40 = 185 sq.ft.

8. Rectangle + Triangle

A = a *b + \frac{a*h}{2} = 9.5 * 9 + \frac{9.5*12}{2} = 85.5 + 57 = 142.5 in^{2}\\

9. Triangle + Rectangle

A = \frac{a*b}{2} + c * d = \frac{12*10}{2} + 12 * 6 = 60 + 72 = 132 sq.ft.

10. Rectangle + Quarter Circle

A = r * b + \frac{\pi r^{2}}{4} = 6 * 8 + \frac{36 \pi}{4} = 48 + 9 \pi = 76.27 in^{2}\\

11. Square + Rectangle

A = a^{2} + b * c = 7 * 7 + 9 * 14 = 49 + 126 = 175 m^{2}

12. Rectangle - 2 * Square

A = a * b - 2 * c^{2} = 25 * 18 - 2 * 8 * 8 = 450 - 128 = 322 sq.ft.

13. Trapezoid

A = \frac{a+b}{2} * h = \frac{10+15}{2} * 15 = 12.5 * 15 = 187.5 sq.ft.

14. Trapezoid - Rectangle

A = a * h  - c * d = 12 * 7 - 9 * 5 = 84 - 45 = 39 in^{2}

15. Rectangle - Triangle

A = a * b - \frac{a * b}{2} = \frac{a*b}{2} = \frac{10 * 20}{2} = 100 in^{2}

16. Square + Trapezoid

A = a^{2} + \frac{a + b}{2} * h = 25 + \frac{5 + 9.5}{2} * 6 = 25 + 43.5 = 68.5 in^{2}

You might be interested in
All prisms are Platonic solids.<br> A. True<br> B. False
dem82 [27]

Answer: False.

Step-by-step explanation: A Platonic solid is a convex polyhedron that is a regular polygon.

5 0
3 years ago
Read 2 more answers
Mrs. Conley asks her class what kind of party they want to have to celebrate their excellent behavior out of all students in the
Vaselesa [24]
20% = 1/5, so 5*5 = 25 students
7 0
3 years ago
There are two numbers such that , if both of them are individually increased by 5 and then by the same percentage as they were i
QveST [7]
Let the two numbers be x and y.
Let m =  the fraction (or percentage) for increasing the numbers.
 
Increase x by 5, multiply (x+5) by (1+m), and set it qual to 36.
(x + 5)*(1 + m) = 36

Increase y by 5, multiply (y+5) by (1+m), and set it equal to 36.
(y+5)*(1+m) = 36

Therefore
(x+5)*(1+m) = (y+5)*(1+m)
x + 5 = y + 5
x = y
x - y = 0

Answer: 0.
The difference between the two numbers is zero.
5 0
3 years ago
A bag contains 4 red marbles and 6 blue marbles. Brandon selects one marble from the bag. Without replacing the marble he then s
IgorC [24]

The probability would be 4/15

4 0
3 years ago
For each hour he babysits, Anderson earns $1 more than half of Carey’s hourly rate. Anderson earns $6 per hour. Which equation c
ozzi
Carey earns c hourly
Anderson earns $6 hourly which is also 1+ c/2
So, 6=1+c/2
      12=2+c
c=$10
Carey earns $10 hourly
3 0
3 years ago
Read 2 more answers
Other questions:
  • HELP WILL GIVE BRAINLIEST QUICK!
    5·2 answers
  • I need help please Someone help me I’m stuck please help me it’s algebra
    8·1 answer
  • A box has a length of 5 cm, a width of 10 cm, and a height of 2 cm. The volume of the box is
    8·1 answer
  • How to do the lesson 4 7th grade
    13·1 answer
  • When p = 12, t = 2, and s = 1/6, r = 18. If r varies directly with p and inversely with the product of s and t, what is the cons
    11·1 answer
  • Are 5/6 and -4.713 on the same side or the opposite side of zero ?
    12·1 answer
  • Please help show work <br><br> A 19<br> B 37<br> C 58<br> D 24
    12·1 answer
  • Which number line correctly illustrates 0.97 ?
    9·1 answer
  • Use the function below to find F-4).<br> F(x) = 2x<br> O A.1/8<br> O B.-16<br> O C.1/16<br> O D.-8
    12·2 answers
  • What is the perimeter of this composite figure?
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!