All categories

2 years ago

1)5x + 7 = -12step by step

Mathematics

1 answer:

tia_tia [17]2 years ago

4 0

Answer:

x=-1

Step-by-step explanation:

Let's solve your equation step-by-step.

5x−7=−12

Step 1: Add 7 to both sides.

5x−7+7=−12+7

5x=−5

Step 2: Divide both sides by 5.

5x/5=-5/5

x=−1

You might be interested in

第 5 个问题 a multiple choice exam has 10 questions. each question has 3 possible answers, of which one is correct. a student knows

tatuchka [14]

The chances that the student was merely guessing is 1/3.

Bayes Theorem determines the conditional probability of an event A given that event B has already occurred.

denoted by

$P(A/B)=\frac{P(A)*P(B/A)}{P(B)}$

let A be the event that the student knows the answer .

B be the event that the student does not knows the answer .

and

E be the event he gets answer correct .

According to the given question

$P(A)=\frac{4}{10} \\\\ P(B)=1-\frac{4}{10} =\frac{6}{10}$

Probability that the answer is correct ,given that he knows the answer is

$P(E/A)=1$

Probability that the answer is correct ,given that he guesses it is

$P(E/B)=\frac{1}{3}$ [as the MCQ has 3 options and only one is correct]

We need to find the probability that he guesses the answer given that it is correct.

Required probability $P(B/E)=\frac{P(B)*P(E/B)}{P(A)*P(E/A)+P(B)*P(E/B)}$

Substituting the values we get

$P(B/E)=\frac{\frac{6}{10} *\frac{1}{3} }{\frac{4}{10} *1+\frac{6}{10} *\frac{1}{3} }$

$=\frac{6}{30}*\frac{30}{18} \\ \\ =\frac{6}{18} \\ \\ =\frac{1}{3}$

Therefore , the chances that the student was merely guessing is 1/3.

Learn more about Probability here brainly.com/question/13140147

#SPJ4

8 0

6 months ago

62 divide 7 what remains number

yarga [219]

Answer:

Step-by-step explanation:

3 0

2 years ago

Really bad at this Helppppppp!!!!!!!

lana66690 [7]

Add them all the rest I'm going to put is bc there needs robbery more letters 673):?:):$:8/!?:$3&38:8!3?3$:&

5 0

2 years ago

Nick bought raffle tickets to try to win a prize. He paid $3.00 for 12 tickets.

natima [27]

The answer is B, it's 0.25 a ticket.

7 0

2 years ago

Read 2 more answers

Write a number in which the value of 9 is 1/100 the value of the 9 in the number 392,065.018

Harman [31]

Answer:

that number is 100

Step-by-step explanation:

Firstly, we will find place value of 9 in 392,065.018

3<u>9</u>2,065.018

We can see that

it is at 10th thousand place

so, place value of 9 is

$=10000$

now, we are given

a number in which the value of 9 is 1/100 the value of the 9 in the number 392,065.018

so, we can get a number as

$=\frac{1}{100}\times 10000$

now, we can simplify it

$=100$

So, that number is 100

5 0

3 years ago

1)5x + 7 = -12step by step​

1)5x + 7 = -12step by step