PLZ HELP ASAP 30 PTS AND BRAINLIEST

Answers

Answer 1

Answer:

Answer:

b = 12

Step-by-step explanation:

The mistake Megan has made is that she has squared the lengths and then added it instead of taking away the squared length's. The method she used was to work out the hypotenuse, so the correct method would be as follows:

a² + b² = c²

→ Substitute in the values

5² + b² = 13²

→ Simplify the equation

25 + b² = 169

→ Minus 25 from both sides to isolate b²

b² = 144

→ Square root both sides to find the value of b

b = 12

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What is the sum of 15 and it's additive inverse

Answers

The sum of 15 and it's additive inverse is 0.

What is additive inverse?

If the sum of two number is 0. Then the numbers are called additive inverse of each other.

Let the additive inverse be $x$

Therefore $x+15=0$

⇒ $x=-15$

Hence we can conclude that $-15$ is correct answer.

Learn more about additive inverse here:brainly.com/question/13592196?referrer=searchResults

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The opposite of a number. For example, the additive inverse of 12 is –12. The additive inverse of –3 is 3. Formally, the additive inverse of x is –x. Note: The sum of a number and its additive inverse is 0. Hope i helped :)

-3x + 1 = 2 (4x - 5)

Answers

-3x + 1 = 2 (4x - 5) =

-3x = 1 ( 4x - 5) =

-3x + 5 = 4x =

5 = 7x

Simplify
1) 3b + b + 6 =
2)n + 5n - 3c =
3) 12d - 2d + e =

Answers

1. 4b plus 6
2. 6n minus 3c
3. 10d plus e

Answer:

1) 4b +6

2) 6n - 3c

3) 10d +e

Step-by-step explanation:

Three sides of a regular polygon with 8 sides are chosen at random. Find the probability that, when these sides are extended, they form a triangle containing the polygon.

Answers

$|\Omega|={8\choose 3}=(8!)/(3!5!)=(6\cdot7\cdot8)/(6)=7\cdot8=56$

There are two possibilities of choosing three sides of the polygon, so when they are extended, they form a triangle containing the polygon (pictures in the attachment). Multiplying it by the number of sides, gives us 16 possibilities in total.

$|A|=16\n\nP(A)=(|A|)/(|\Omega|)\nP(A)=(16)/(56)=(2)/(7)$

you have $550 in a savings account that earns 3% simple interest each year . how much will be in your account in 10 years?