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3 years ago

Answer 20 and 21 please

Mathematics

1 answer:

weeeeeb [17]3 years ago

7 0

Answer:

20 is unreal numbers and 21 is no solution

Step-by-step explanation:

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Consider the equation 1/3x−2=x+2. Write a system of linear equations using each side of the equation. Then solve the original eq

Ierofanga [76]

Answer:

(-6,4)

Step-by-step explanation:

1/3x − 2 = x + 2 is obtained by equating the following two functions:

y = (⅓)x - 2

y = x + 2

Graph:

Draw two straight lines

1) joining (0,-2) and (6,0)

2) joining (0,2) and (-2,0)

On the graph, you'll see that the above two lines intersect at: (-6,4)

Hence the solution is (-6,4)

5 0

3 years ago

20 people applied for a job. Everyone either has a school certificate or diploma or even both. If 14 have school certificates an

STatiana [176]

Given:

Either has a school certificate or diploma or even both = 20 people

Having school certificates = 14

Having diplomas = 11

To find:

The number of people who have a school certificate only.

Solution:

Let A be the set of people who have school certificates and B be the set of people who have diplomas.

According to the given information, we have

$n(A)=14$

$n(B)=11$

$n(A\cup B)=20$

We know that,

$n(A\cup B)=n(A)+n(B)-n(A\cap B)$

$20=14+11-n(A\cap B)$

$20=25-n(A\cap B)$

Subtract both sides by 25.

$20-25=-n(A\cap B)$

$-5=-n(A\cap B)$

$5=n(A\cap B)$

We need to find the number of people who have a school certificate only, i.e. $n(A\cap B')$ .

$n(A\cap B')=n(A)-n(A\cap B)$

$n(A\cap B')=14-5$

$n(A\cap B')=9$

Therefore, 9 people have a school certificate only.

3 0

3 years ago

What is the distance between the following points?

Savatey [412]

Answer:

What points?

Step-by-step explanation:

7 0

3 years ago

Pls help me! I will mark brainliest if you are correct

Aleksandr [31]

Answer:

I' would say A but C could be a possibility.

Step-by-step explanation:

8 0

2 years ago

Read 2 more answers

How is this expression written with exponents? 3 . 3 . x . x . x . x

marin [14]

Solve:-

Write it down again:-

3 · 3 · x · x · x · x

We will write it like this:-

3 · 3 · x³

7 0

3 years ago