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3 years ago

In the equation 3x - 9 = 3, what is the first step we should do?

Mathematics

1 answer:

zavuch27 [327]3 years ago

4 0

Anse

draw the line down the equal sign

Step-by-step explanation:

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I WILL GIVE 20 POINTS TO THOSE WHO ANSWER THIS QUESTION RIGHT NOOOO SCAMS AND EXPLAIN WHY THAT IS THE ANSWER

Step2247 [10]

Answer:

$A = 297\pi$

Step-by-step explanation:

To solve this problem we need to be familiar with the formula for the surface area of a cone:

$A = \pi r(r + \sqrt{h^2+r^2})$

We are given the length of a side and the diameter, to calculate the radius divide the diameter in half:

$r = \frac{d}{2}\\r = \frac{18}{2}\\r = 9 cm$

To calculate the height of the cone, we must use the Pythagorean Theorem:

$C^2 = A^2 + B^2$

We can treat the side length as the hypotenuse $C$ , the radius as the base $A$ , and solve for height $B$ . Set the expression up like this:

$C^2 = A^2 + B^2\\24^2 = 9^2 + B^2\\B^2 = 24^2 - 9^2\\B = \sqrt{24^2 - 9^2}\\B = \sqrt{576 - 81}\\B = \sqrt{495}\\B \approx 22.25$

Now we can plug into our original formula:

$A = \pi r(r + \sqrt{h^2+r^2})\\A = \pi 9(9+\sqrt{\sqrt{495}^2+9^2}\\A = \pi 9(9+\sqrt{495 + 81}\\A = \pi 9(9+\sqrt{576})\\A = \pi 9(9 + 24)\\A = \pi 9(33)\\A = 297\pi$

5 0

2 years ago

Find the value of x showing your steps. identify the postulate that allowed you to solve for x.

Lena [83]

Answer:

x = 14

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

Algebra I

Equality Properties

Geometry

Congruency
All angles in a triangle add up to 180°

Step-by-step explanation:

Step 1: Define

3(x + 7)° = 63°

3(x + 7)° + 63° + y° = 180°

Step 2: Solve for x

Divide 3 on both sides: x + 7 = 21
Subtract 7 on both sides: x = 14

3 0

3 years ago

Find the circumference of a circle with a diameter of 18 inches

ValentinkaMS [17]

Answer:

39.4384

Step-by-step explanation:

C= 2(pi)(r)

C=2(3.14)(9)

39.4384=2(3.14)(9)

7 0

4 years ago

Read 2 more answers

At a concession stand, a pickle and two bags of chips cost a total of $3.25. Three pickles and four bags of chips cost a total o

Ratling [72]

Answer:

p + 2c = 3.25 Start with these two equations

3p + 4c = 7.25

p = -2c + 3.25 Solve for one variable

3(-2c +3.25) + 4c = 7.25 Substitute

-6c + 9.75 + 4c = 7.25

-2c = -2

c = 1

p + 2(1) = 3.25 Substitute

p + 2 = 3.25

p = 1.25

A bag of chips costs $1

A pickle costs $1.25

Step-by-step explanation:

please mark me

3 0

2 years ago

Distributive property, I’ll mark brainliest if correct !!

lions [1.4K]

Answer:

1) -2x + 10

3) -7x -21

5) 5 - 15x

7) 20x -50

9) -4x +1

11) 18x -8

13) 24x + 36

7 0

3 years ago