Solve this system
5x – 4y + 2z = 21
-x - 5y + 6z=-24
--x – 4y + 5z =-21
O x = 5, y = -1, z = -4
0 x = 1, y = 5, z = -4
O x=-5, y = 1, z = -4
O x = -4, y = -1, z = 5

I'm not going to do all of them for you but I'm basically going to teach you what your teacher taught you.

In division with fractions, the second fraction will be flipped around and then you'll multiply normally.

Example:

(5/3)/(2/3)

You would flip around the 2/3 so it would be 3/2

Then you would multiply:

5/3*3/2

To do multiplication, multiply the top numerator by the top numerator and the bottom numerator by the bottom numerator as I'm sure you've already learned

5*3 = 15

3*2 = 6

15/6

Let me know if you have any questions

If you're wondering why I didn't give you the answer, it's because "Give a man a fish and he'll eat for a day; teach a man to fish and he will eat for a lifetime"

Thank you

Answer:

5.714 (rounded to the nearest thousandth)

Step-by-step explanation:

Answer:

What do you need help with

Step-by-step explanation:

Answer:

[tex]r = -9[/tex]

Step-by-step explanation:

Given

[tex]Sequence: 9,-81, 729,-6561...[/tex]

Required

Determine the common ratio

The common ratio r is calculated using:

[tex]r = \frac{T_n}{T_{n-1}}[/tex]

Let [tex]n = 2[/tex]

So, we have:

[tex]r = \frac{T_2}{T_{2-1}}[/tex]

[tex]r = \frac{T_2}{T_1}[/tex]

From the sequence:

[tex]T_2 = -81[/tex]

[tex]T_1=9[/tex]

So, the equation becomes

[tex]r = \frac{-81}{9}[/tex]

[tex]r = -9[/tex]

Answers:

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

Explanation:

The general form of a slope intercept equation is y = mx+b

m = slope

b = y intercept

Something like y = (-7/6)x + 1 matches with y = mx+b such that m = -7/6 is the slope and b = 1 is the y intercept. So that's why problem 1 matches with choice b (in column B).

Similar situations apply for problems 2 and 3

-----------

For problem 4, we can see the slope is m = -1, but unfortunately m = -1 isn't listed in column B. However, m = -7/7 is listed. So this is why problem 4 matches with choice a. This leaves problem 5 to match with choice e.

note: 6/7 = 12/14 after multiplying top and bottom by 2.

Answer:

A. x + y = 4000

   5x + 3y = 15000

Step-by-step explanation:

Total amount raised = $15000

cost of adult tickets = $5

cost of student tickets = $3

Total number of tickets sold = 4000

number of adult tickets sold = x

number of student tickets sold = y

Then we can say,

total number of ticket sold = number of adult tickets + number of student tickets

4000 = x + y

⇒ x + y = 4000 ............. 1

Also,

5x + 3y - 15000 ............. 2

the equations required are:

x + y = 4000

5x + 3y - 15000

Answer:

an annuity is a type of retirement income product that you buy with some or all of your pension pot. it pays a regular retirement income either for life or for a set period. (hope this is a decent answer lol)

Step-by-step explanation:

Answer:

An annuity is a contract between you and an insurance company in which you make a lump-sum payment or series of payments and, in return, receive regular disbursements, beginning either immediately or at some point in the future.

Step-by-step explanation:

Answer:

all of them are right except for A

Step-by-step explanation:

Answer:

40 flapjacks

Step-by-step explanation:

Given the recipe :

Recipe: Makes 10 flapjacks

120 g margarine

100 g sugar

150 mL syrup

225 g oats

40 g sultanas

Given that all other ingredients are kept Constant.

225g of oats produces 10 flapjacks

0.9 kg of oat = 0.9 * 1000 = 900g oat

If :

225 g = 10 flapjacks

900 g = x

Cross multiply :

225x = 900 * 10

225x = 9000

x = 9000 / 225

x = 40

40 flapjacks

Answer:

1440 $

Step-by-step explanation:

3000 - 100%

x - 12%

360 - 1 yea

Step-by-step explanation:

Answer:

I think 32 inches 2.

But I am not 100% sure.

Answer:

I would LOVE to help but your photo is just a black screen for me.  Sorry

Answer:

5

Step-by-step explanation:

It is asking the y-intercept of the x- intercept, 0.

Answer:

The number of guests remaining at 9:00 is;

(20-2x)

Step-by-step explanation:

From the question, we are told that x groups have left

Since they are leaving in groups of 2, x groups means a total of x * 2 = 2x

So we have 2x left out of a total 20; the people remaining at the party will be;

20-2x

Answer:

Step-by-step explanation:

Slope=(y-y)/(x-x)=3/1=3

Answer:

c one demonstrates the distributive property

Answer:

hi :)

Step-by-step explanation:

0 yrs is 350 or 500 im not sure but, and then 6 yrs is 1350 $

Answer:

103.823

Step-by-step explanation:

It's just 4.7 to the third power, so I multiplied to get 103.823. :)

Answer:

C. y = -2/3x + 4

Step-by-step explanation:

y = mx + b

y-intercept of positive 4 on the y axis

m is the slope which is down 4 right 6 which reduces to -2/3

Answer:

x=12

Step-by-step explanation:

If the triangles are similar:

x/8=18/12

x/8=1.5

x=12

Answer:

12.

Step-by-step explanation:

Answer:

i need points

Step-by-step explanation:

Answer:

1.a and 2.b.

Step-by-step explanation: let's say the area=2. if you multiply by 2, it gets bigger. if d<1, it's like dividing by a number, meaning that the area becomes smaller.

Answer:

1. a

2. b

Step-by-step explanation:

1. If d is greater than one (d>1), then that means that the shape will be dilated outward, or expanded because the number is larger than the unit of 1.

2. Multiplying the coordinates by a fraction that is less than one (0<d<1) makes the shape smaller, because fractions are smaller than the unit of 1.

Answer:

13-h is h less than 13. this is how you answer this.

Hey there!

Sometimes “less than” means “>” ( a number smaller than the number that’s being compared to) or “subtraction”

So, therefore your answer should be

[h < 13] or [h - 13]

Good luck on your assignment and enjoy your day!

~Amphitrite1040:)

Answer:8

Step-by-step explanation:

Khan academy answer

Answer: 1/6

Step-by-step explanation:

Slope is the m in y=mx+b

Answer:

1.75

Step-by-step explanation:

1.75 :) you can check your answer by multiplying by 3!

Brainliest would be appreciated

Answer:

125 women

Step-by-step explanation:

Answer: 75 women

Step-by-step explanation:

4/5

60/4=15

15x5= 75

Given:

Consider the given sequence is 9, 81, 729, 6561.

To find:

The common ratio.

Solution:

We have,

9, 81, 729, 6561

Here,

First term = 9

Second term = 81

Divide the second term by first term to get the common ratio.

[tex]r=\dfrac{81}{9}[/tex]

[tex]r=9[/tex]

Similarly,

[tex]\dfrac{81}{9}=\dfrac{729}{81}=\dfrac{6561}{729}=9=r[/tex]

Therefore, the common ratio is 9.