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snow_tiger [21]
3 years ago
7

HELP PLEASEEEE!!! First correct answer gets brainliest! ​

Mathematics
1 answer:
RUDIKE [14]3 years ago
5 0

Answer:

It is a solution

Step-by-step explanation:

y = -4x - 8

Let x = -9 and y = 28

Substitute these values in

28 = -4(-9) -8

28 = 36 -8

28 =28

This is true so it is a solution

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Why I can't go to my k12 school but it keeps saying
k0ka [10]

Answer:

you're gonna have to turn it off and on again

Step-by-step explanation:

1. off

2. on

3 0
2 years ago
Read 2 more answers
P and Q are sunsets of the universal set U={n:1<n<10} and n is an integer. P consists of even numbers less than 7 and Q co
Sauron [17]

Part A

<h3>Answer:    P' u Q' = {3,4,5,6,7,8,9}</h3>

---------------------------------

Work Shown:

The universal set here is U = {2,3,4,5,6,7,8,9} so we're listing all the integers between 2 and 9. We don't include 1 or 10 since n is larger than 1, and smaller than 10.

P = even numbers less than 7, subset of U

P = {2,4,6,8}

P ' = {3,5,7,9}

Note how the set P' is the set of everything in U that is not in set P. It's the opposite of set P. We call this the complement of set P.

Q = prime numbers less than 10, subset of U

Q = {2,3,5,7}

Q ' = {4,6,8,9}

Applying the union set operation on the sets P' and Q' leads to

P' u Q' = {3,5,7,9,     4,6,8,9}

All I did was combine the two sets of numbers under one umbrella. From here we toss out the duplicate entry of 9. This next step is optional, but sorting the values is standard convention.

Doing all this leads to

P' u Q' = {3,4,5,6,7,8,9}

This set represents all the values that are in set P' or in set Q' or both.

=======================================================

Part B

<h3>Answer:   P' n Q' = {9}</h3>

---------------------------------

Work Shown:

Now we're looking at the intersection of sets P' and Q'

List out those sets

P ' = {3,5,7,9}

Q ' = {4,6,8,9}

We see that only the value 9 is in common

Therefore,

P' n Q' = {9}

=======================================================

Part C

Answer:

(P' n Q')' = {2,3,4,5,6,7,8}

---------------------------------

Work Shown:

You start with the result from part B. Then you erase that item (9) from the universal set. Everything in this answer set is not found in the set {9}

Put another way: we're finding the complement or opposite of P' n Q'

=======================================================

Part D

<h3>Answer:     (P u Q)' = {9}</h3>

---------------------------------

Work Shown:

P = {2,4,6,8}

Q = {2,3,5,7}

P u Q = {2,3,4,5,6,7,8}

Everything in set P u Q is either found in P, Q, or both. Any duplicates are tossed out.

Take the opposite of this to get

(P u Q)' = {9}

It is not a coincidence we get the same result as part B. It turns out that the two equations are true for any two sets P and Q

  • (P u Q)' = P' n Q'
  • (P n Q)' = P' u Q'

For more information, check out De Morgan's Laws. Use of a Venn Diagram may help visualize what is going on, so you can organize the values.

5 0
3 years ago
Three customers open a bank account that does not earn interest with first bank. The table below displays the amount each custom
EastWind [94]

Answer:  kim earns the most

Step-by-step explanation:

6 0
2 years ago
Can someone please help me with this?
lyudmila [28]

Answer:

∠b=133°

∠c=47°

∠d=133°

Step-by-step explanation:

We are given with two lines intersecting at a point and thus forming 4 angles

∠a , ∠b ,∠c and ∠d

Here we must understand the properties of angles formed by two intersecting lines.

Supplementary Angles :

In our image following pairs are supplementary angles

∠a and ∠b

∠b and ∠c

∠c and ∠d

∠d and ∠a

the properties of supplementary angles say that their sum is 180°

Hence if ∠a=47°

∠a+∠b=180°

47°+∠b=180°

∠b=180°-47°

∠b=133°

Vertically opposite angles. When two lines intersects , they form two pairs of vertically opposite angles

here

∠a and ∠c

∠b and ∠d

are vertically opposite angles

The property says that they are equal.

Hence

if ∠a=47° , ∠c=47°

if ∠b=133° , ∠d=133°

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3 years ago
The governor of Florida would like to estimate the mean age of all Florida residents. To do so, he randomly selects 500 Florida
lukranit [14]

Answer:

I would say sample

7 0
3 years ago
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