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
lorasvet [3.4K]
3 years ago
8

Can someone help will all the problems I will mark you the brainest!

Mathematics
1 answer:
lyudmila [28]3 years ago
6 0

Answer:

1. C = 29.52 inches A = 69.63 square inches

2. C = 28.26 inches A = 63.59 square inches

3. Each side of the lawn is 13 yards.

4. 7 is a rational number (\frac{14}{2}), a whole number, and an integer.

5. x = 16

6. h = 12.4

Step-by-step explanation:

1.

π = 3.14

The formula for the circumference of a circle that uses radius is C = 2πr.

C = 2 × 3.14 × 4.7 --- plug in known info

C = 29.516 inches --- solve

C = 29.52 inches

The formula for the area of a circle that uses radius is A = πr².

A = 3.14 × 4.7² --- plug in known info

A = 3.14 × 22.09 --- solve

A = 69.3626 square inches --- solve

A = 69.63 square inches

2.

The formula for the circumference of a circle that uses diameter is C = πd.

C = 3.14 × 9 --- plug in known info

C = 28.26 inches --- solve

To solve for area with the diameter, divide it by 2 and use the radius area formula.

\frac{9}{2}

r = 4.5

A = πr²

A = 3.14 × 4.5² --- plug in known info

A = 3.14 × 20.25 --- solve

A = 63.585 square inches --- solve

A = 63.59 square inches

3.

Because the lawn is square, the length and width of the lawn are equal.

Let x = the length and width.

x × x = 169 --- l × w = area of rectangle

x² = 169 --- x × x is the same as x²

x = 13 --- square root both sides to get rid of square on x

Each side of the lawn is 13 yards.

4.

√49 = 7

Rational number: a number that can be expressed as a simple fraction of 2 integers, 7 = \frac{14}{2}

Irrational number: a number that cannot be expressed as a simple fraction of 2 integers, √2

Whole number: All natural numbers, including 0, up to infinity, 0, 1, 2, 3, 4, 5...

Integer: All whole numbers and their negative counterparts -4, -3, -2, -1, 0, 1, 2, 3, 4…

7 is a rational number (\frac{14}{2}), a whole number, and an integer.

5.

We can solve for x using the Pythagorean theorem: If a triangle is right, a² + b² = c².

12² + x² = 20² --- plug in known info

144 + x² = 400 --- solve

x² = 256 --- subtract 144 from both sides

x = 16 --- square root both sides

6.

Same as problem 5, we will use the Pythagorean theorem to solve.

3² + 12² = h² --- plug in known info

9 + 144 = h² --- solve

153 = h² --- solve

h = 12.36931688 --- square root both sides

h = 12.4 --- round to nearest 10th




You might be interested in
Solve for x. <br> 7x - 3 = 4x - 9
artcher [175]

Answer:

x= -2

Step-by-step explanation:

7x-3=4x-9

3x-3= -9

3x= -6

x= -2

7 0
2 years ago
Read 2 more answers
Four times a number minus twice another number is -8. The sum of the two number is 19.Find the numbers
grigory [225]
1. To solve this exercise, you must make a system of equations.

 2. You have that f<span>our times a number minus twice another number is -8:
</span>
 4x-2y=-8

 3. And t<span>he sum of the two number is 19:
</span>
 x+y=19

 4. As you can see, you have two equations:

 4x-2y=-8   (i)
 x+y=19     (ii)

 5. Let's clear the "x" from the equation (ii):

 x=19-y

 6. Now, you need to susbtitute x=19-y into the equation (i):

 4x-2y=-8
 4(19-y)-2y=-8
 76-4y-2y=-8
 76-6y=-8
 -6y=-8-76
 -6y=-84
 y=-84/-6
 y=14

 7. You must susbstitute y=14 into the equation (ii) and clear "x":

 x+y=19
 x+14=19
 x=19-14
 x=5

 The answer is: 5 and 14
6 0
3 years ago
WILL NAME BRAINLIST!!
Novosadov [1.4K]

Answer:

D

Step-by-step explanation:

The fourth graph makes sense, and follows Deepak's equation. To check if a graph follows an equation, all you have to do is substitute the values of x and y into the equation and see if they follow the equation.

3 0
3 years ago
Read 2 more answers
A video game store was getting rid of old games selling them 3 for $56.28 .if they sold 7 games how much money would they have m
Liula [17]
You divide 56.28 by 3 so 18.76 then multiply by 7 which is 131.32 hope this helps!
7 0
2 years ago
ADMIT
Alex_Xolod [135]

Answer:

What is a factor?

Step-by-step explanation:

5 0
3 years ago
Other questions:
  • Use the drop-down menus to complete these statements.
    14·2 answers
  • The rectangle shown is enlarged such that each side is multiplied by the value of the width, 2x. Which expression represents the
    14·1 answer
  • How do you get the x intercepts?
    12·1 answer
  • Which of these describes the transformation of the triangle
    15·1 answer
  • Please help!! I need to make up my own formula with LENGTH X WIDTH, can someone please help me!!!
    13·1 answer
  • Please help me! I'm spending 50 points on this question and my last two questions never even got answered!
    6·1 answer
  • Please help me with my math homework!<br> -16/9=-4/3(5/3+n) please show work
    15·1 answer
  • Figure ABCD is a parallelogram.
    15·2 answers
  • Janessa can run 1/2 of a mile in 4 1/3 minutes what is her unit rate in miles per minute ​
    11·1 answer
  • What is the value of 55−−√ to the nearest tenth? Show or explain how you got your answer.
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!