What is the reciprocal of 2/5

Answers

Answer 1

Answer: The reciprocal would be 5/2.

Answer 2

Answer: 5/2 in decimal form 2.5

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What is x for number 14.

Answers

It's a right triangle. So

(x²) + (10²) = (7+x)²

x² + 100 = 49 + x² + 14x

That may look ugly, but I'm pretty sure you can handle it from this point.

Wow ! I just noticed that you can subtract x² from each side
and not even have to mess with it again.

x^2 $(x+7)^2=x^2+10^2x^2+14x+49=x^2+10014x+49=10014x=51x=3.64$

If you can only use 3 of these numbers once to find a sum of 30 without subtracting or adding additional numbers, what three numbers would you use out of 1, 3, 5, 7, 9, 11, 13, and 15? ()+()+()=30

Answers

Answer:

The correct answer is

It is impossible to add odd numbers (1, 3, 5, 7, 9, 11, 13, and 15) and odd number of times (3) to get an even number (30)

Step-by-step explanation:

1, 3, 5, 7, 9, 11, 13, and 15 are all odd numbers and 30 is an even number

When odd numbers are added even times the answer is always even for example 3 + 5 = 8, and when odd numbers are added odd times the answer is always odd for example 1 + 5 + 7 = 13

It is not possible to add three odd numbers to get an even number

Where x = odd therefore x + 1 = even = y say

hence 2 × x = 2×(y-1) = 2·y - 2 = even number

Also 3 × x = (3y -3) = odd number

Answer: The answer is 7+(3+5)+15 = 30

Resuelve las siguientes ecuaciones en tu cuaderno y realiza la comprobación decada una.

3x 2 + 12 x = 0

Me ayudan :u y si no saben mejor ni comenten:)

Answers

3x + 2 + 12x = 0
15x + 2 = 0
15x + 2 - 2 = 0 - 2
15x = -2
15x/15 = -2/15
X = -2/15
I hope that answers your question

I need help on this question

Answers

Answer:

Step-by-step explanation:

(f - g)(x)

= f(x) - g(x)

= 5x² - 3 - ( x² - 4x - 8) ← distribute parenthesis by - 1

= 5x² - 3 - x² + 4x + 8 ← collect like terms

= (5x² - x² ) + 4x + (- 3 + 8)

= 4x² + 4x + 5

Answer:

The answer is C. (f-g)(x) simplifies to 4x²+4x+5

I need to write an equation for:

ten times the sum of half a number and 6 is 8

Answers

Let's start with the easy part of this equation. We know it will end with = 8 because of the the phrase "is 8". Now let's work backwards, starting with the sum of half a number and 6. In this example, we will represent "a number" with x. To take half a number is to divide it by 2, so half a number would be x/2. The phrasing "the sum of" indicates addition, therefore the sum of half a number and 6 would be represented by x/2+6. Now for the the first part of the equation, ten times. This phrasing indicates multiplication, and so we will multiply 10 by the remainder of the equation, This gives us the answer of 10(x/2+6). Now all you have to do is add the equals sign and answer to make this expression and equation, and you get 10(x/2 + 6) =8

Can you please help me with this question?

Answers

9514 1404 393

Answer:

240°

Step-by-step explanation:

The sum of angles in a quadrilateral is 360°, so you have ...

a° +b° +60° +60° = 360°

a° +b° = 240° . . . . . . subtract 120° from both sides

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