How would you algebraically factor x squared minus 15?

Answers

Answer 1

Answer: $Use:a^2-b^2=(a-b)(a+b)\n-----------------------\n\nx^2-15=x^2-(√(15))^2=(x-√(15))(x+√(15))$

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Which angle is coternal with 130 degrees?

Answers

Answer:

- 230°

Step-by-step explanation:

A coterminal angle is the given angle ± 360n ( where n is an integer )

Given 130°

Then a coterminal angle = 130° - 360° = - 230°

OR 130° + 360° = 490°

How many tens are in 39

Answers

Answer:

3 tens and 9 ones

Step-by-step explanation:

Answer:

3 tens and 9 ones

Step-by-step explanation:

3 tens= 30

9 ones = 9

30+9=39

a recipe for cake is 3/4 of cup of milk. You are making 1/2 of the recipe. How much milk do you need?

Answers

Answer is 3/8 cup (or 1/4 cup plus 1/8 cup) There are all sorts of ways to figure this out. Here is one: 1/2 x 3/4 = 3/8

Answer: Answer is 3/8 cup (or 1/4 cup plus 1/8 cup) There are all sorts of ways to figure this out. Here is one: 1/2 x 3/4 = 3/8

What is 6y - 12 = -3x in standard form?

Answers

To get it into standard you need to simplify
6y - 12 = -3x add 12 to both sides
6y = -3x + 12 add 3x to both sides
3x + 6y = 12
And that is in standard which is A + B = C

What is 6a-12=8a ?????????? in solving linear equations???

Answers

$6a-12=8a$

$6a-8a=12$

$-2a=12$ ⇒ $a= (12)/(-2)$

$\boxed {a=-6}$

$6a-12=8a\n8a-6a=-12\n2a=-12\na=-6$

a cylindrical water tower is 24 feet high and has a diameter of 20 feet. approximately how many cubic feet if water could the tower hold? (answers above^^)

Answers

Answer:

Helloo.

Step-by-step explanation:

Because this question is asking how much water the water tower can hold, it's asking for the volume of a cylindrical figure. Let's use this formula:

First, let's find our variables by plugging in our information.

(

)

(

)

(

)

(

)

Following PEMDAS (Parentheses, Exponents, Multiply, Divide, Add, Subtract), we'll find

(

)

first.

(

100

)

(

)

Now, multiply (100) and (24):

(

2400

)

2400

, or

7539.8

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