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3 years ago

Find the error and explain why:

Mathematics

1 answer:

Sloan [31]3 years ago

5 0

1) 9x + 2 = x + 5 ---> 9x + 2 = 6

subtracted X from one side but not the other

2) 3(x-4) + 5 = 12 ---> 3x + 4 + 5 = 12

didn't distribute correctly: 3(x-4)

multiplied the X by 3 but not the -4

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Q1) the world is being invade by alien robots but do not fear because 2 superhero are here to save the day.....

jeyben [28]

A) Super Karate Chop Man will chop 240 robots in 10 minutes

B) He will crush 1,431 in 27 minutes.

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3 years ago

Let y be inversely proportional to x. if x doubles, what happens to y?

Mila [183]

When it is said that a variable is inversely proportional to another, it is best to write out an equation to represent it.

This means;

y=k/x (where k is a constant number like 1 or 2, etc)

If you double x, the value of y is halved. I have attached a graph that shows this.

Hope I helped :)

4 0

4 years ago

Y = 5x - 10 Can you solve for x

tensa zangetsu [6.8K]

Answer:

$x = \frac{1}{5}y + 2$ or $x = \frac{y+10}{5}$ (Not sure which one is preferred in your case)

Step-by-step explanation:

Key skills needed: Evaluating expressions

1) We are given: $y = 5x-10$

2) To solve for the x variable, we want to leave the term with "x" by itself.

This means we add 10 to both sides

--> $y + 10 = 5x$ (Since -10 and +10 cancel out to make 0 or nothing)

3) Then we divide by 5 on both sides to get "x" completely by itself.

-----> $\frac{y+10}{5} = x$

4) You can keep it as is so --> $x = \frac{y + 10}{5}$

or you can divide "y" by 5 and "10" by 5 and get --> $x = \frac{1}{5} y + 2$

(I am not sure which form is preferred one is preferred as the teacher matters)

Hope you understood and have a nice day!!

6 0

3 years ago

Read 2 more answers

Carlos has a fair die and a number cube. He will flip the fair die one time and roll the number cube one time. What is the proba

saul85 [17]

Answer: 0.42 and 5 outcomes.

Step-by-step explanation:

i guess that carlos has a fair coin and a number cube.

the probability can be calculated as the number of outcomes that we want divided the total number of outcomes.

The coin has two possible outcomes, heads and tails, then the probability of getting heads is p1 =1/2

the number cube has 6 numbers, 5 of those 6 numbers are greater than 1, then the probability of getting a number greater than 1 is p2 =5/6

the joint probability is the product of those two:

P = 1/2*5/6 = 5/12 = 0.42

The combinations that include heads and number greater than 1 are 5 combinations:

Heads and 2

Heads and 3

Heads and 4

Heads and 5

Heads and 6.

5 0

3 years ago

Customer arrivals at a bank are random and independent; the probability of an arrival in any one-minute period is the same as th

IgorLugansk [536]

Answer:

0.2240418 ; 0.57681

Step-by-step explanation:

Given the information above :

A) What is the probability of exactly three arrivals in a one-minute period?

Using poisson probability function :

p(x ; m) = [(m^x) * (e^-m)] / x!

Here, m = mean = 3, x = 3

P(3 ; 3) = [(3^3) * (e^-3)] / 3!

P(3;3) = [27 * 0.0497870] / 6

= 1.3442508 / 6

= 0.2240418

B) What is the probability of at least three arrivals in a one-minute period?

Atleast 3 arrivals

X >= 3 = 1 - [p(0) + p(1) + p(2)]

P(0 ; 3) = [(3^0) * (e^-3)] / 0! = (1 * 0.0497870) / 1 = 0.0497870

P(1 ; 3) = [(3^1) * (e^-3)] / 1! = (3 * 0.0497870) / 1 = 0.1493612

P(2 ; 3) = [(3^2) * (e^-3)] / 2! = (9 * 0.0497870) / 2 = 0.2240418

1 - [0.0497870 + 0.1493612 + 0.2240418]

1 - 0.42319 = 0.57681

7 0

3 years ago