6x-5y-z=7 i have to eliminate x
the full question is
2x+y-3z=5
2x+3y+z=13
6x-5y-z=7

Answers

Answer 1

Answer: 2y - 20z = -16

Step-by-step explanation:

6(2x+y-3z) = 5(6)

=> 12x + 6y- 18z = 30

3(2x + 3y + z) = 13(3)

=> 6x + 9y + 3z = 39

Now minus the top equation from the bottom two:

12x + 6y - 18z = 30

6x + 9y + 3z = 39

6x - 5y - z = 7

12x + 6y - 18z = 30

12x + 4y + 2z = 46

Minus top from bottom:

2y - 20z = -16


Related Questions

Which multiplication problem does the model show?
Please help me it’s-test

Answers

I think the third once because is Making criss-cross

Hannah and Jenny are selling pies for a school fundraiser. Customers can buy cherry pies and
blackberry pies. Castel sold 13 cherry pies and 1 blackberry pie for a total of $97. Jasmine sold
6 cherry pies and 3 blackberry pies for a total of $93. What is the cost each of one cherry pie and
one blackberry pie?

Answers

Answer:

6 for cherry

19 for blackberry

Step-by-step explanation:

Cherry = x

Blackberry = y

Make system of equations:

Castel:

13x + y = 97

Jasmine:

6x + 3y = 93

Substitution w/ Castel's equation:

y = 97 - 13x

Put into Jasmine's equation

6x + 3(97 - 13x) = 93

6x + 291 - 39x = 93

291 - 33x = 93

-33x = -198

x = 6 $ per Cherry Pie

Plug x = 6 into any equation (choose Castel's):

13(6) + y = 97

y + 78 = 97

y = 19 $ per Blackberry Pie

**Check answers... and it's correct yay

Someone please help me in this I don’t want to fail..please..I’m so bad at math..

Answers

Answer:

i think your answer would be d

Step-by-step explanation:

hope this helps!

Solve for the variable

Answers

Answer:

v= 25

Step-by-step explanation:

Try to isolate the variable by getting rid of the 5. Multiply both sides of the equation by 5 to cancel out the 5 on the left side. You are left with 7v= 35(5). Simplified it is 7v= 175. Then to get the v alone, you need to divide both sides by 7 to cancel out the 7 on the left side. You are left with v= 175/7.

This is v= 25

6th grade math help me pleaseee

Answers

Answer:

b=9

Step-by-step explanation:

1/3b=3

divide 1/3 on each side

b=9

Answer:

y=1/3×b 3=1/3×b b=9 So 9 total batched

Can anyone help??? due in 10 mins please.

Answers

Step-by-step explanation:

(6x+4)+(4x+26)+110°=180°{straight angle}

10x+140=180°

10x=180-140

x=40/4

x=10

(6x+4)=(6×10+4)=(60+4)=64°

(4x+26)=(4×10+26)=40+26=66°

hope it helps.

Answer:

6x+4+4x+26+110=180 straight line

10x=180-140

x=40/10=4

<A=4x+26=4×4+26=42

50 is equal to the difference of a number and 17​

Answers

Answer:

67

Step-by-step explanation:

i hope this is right ......

Answer:

50-17=33

33+17=50

could be wrong I don't know

Maya has 200 songs on her cell phone. 48 songs are K-Pop. What ​percent​ of Maya's songs are K-Pop?

Answers

48 /200 x 100/1 = 24%

Answer: 24%

Step-by-step explanation:

Write and solve an equation to find the value of x and a missing angle in the triangle below.

Answers

Answer:

angle UTS +TSU =TUV

THEREFORE, 81 + 12X =24X+9

THEREFORE, 81 - 9 = 24X - 12X

THEREFORE, 72 = 12X

THEREFORE, 72/12 =X

THEREFORE, x = 6

THEREFORE, ANGLE TSU = 12 * X

= 12 *6

= 72

YOUR ANSWER IS

X=6

TSU=72

THANK YOU......

Help please! im confused

Answers

Answer:

1/2

Step-by-step explanation:

area of larger square: 12 x 12 = 144

area of smaller square: 6√2 x 6√2 = 72

S/B = 72/144 = 1/2

For the graphed function f(x) = (4)x - 1 + 2, calculate the average rate of change from x = 2 to x = 4.

Answers

Answer:

[tex]Average = 30[/tex]

Step-by-step explanation:

Given

[tex]f(x) = 4^{x - 1} + 2[/tex]

Required

Average [tex]rate\ of\ change[/tex] from 2 to 4

This is calculated using:

[tex]Average = \frac{f(b) - f(a)}{b - a}[/tex]

Where

[tex]a= 2[/tex]  and  [tex]b = 4[/tex]

So:

[tex]Average = \frac{f(4) -f(2)}{4 - 2}[/tex]

[tex]Average = \frac{f(4) -f(2)}{2}[/tex]

Calculate f(2) and f(4)

[tex]f(x) = 4^{x - 1} + 2[/tex]

[tex]f(2) = 4^{2-1} + 2[/tex]

[tex]f(2) = 4 + 2[/tex]

[tex]f(2) = 6[/tex]

[tex]f(4) = 4^{4-1} + 2[/tex]

[tex]f(4) = 4^3 + 2[/tex]

[tex]f(4) = 66[/tex]

So:

[tex]Average = \frac{f(4) -f(2)}{2}[/tex]

[tex]Average = \frac{66 - 6}{2}[/tex]

[tex]Average = \frac{60}{2}[/tex]

[tex]Average = 30[/tex]

At Mauras feeding boutique for out of the 40 beads on clearance are plastic what percentage of beads on clearance are plastic

Answers

Answer:

The answer is "6".

Step-by-step explanation:

Please find the complete question in the attached file.

Given:

[tex]percenatge= 15 \%\\\\beads= 40[/tex]

[tex]\to \frac{15}{100} \times 40\\\\\to \frac{600}{100} \\\\\to 6[/tex]

12ax² - (9a² - 8b²) x + (2a² + 5ab + 2b²) = 0 solve for x​

Answers

Answer:

[tex]\sqrt{\frac{(8b^2-9a^2)^2}{576a^2}-\frac{2b^2+5ab+2a^2}{12a} } -\frac{8b^2-9a^2}{24a} \\\\or\\-\sqrt{\frac{(8b^2-9a^2)^2}{576a^2}-\frac{2b^2+5ab+2a^2}{12a} } -\frac{8b^2-9a^2}{24a}[/tex]

Step-by-step explanation:

The quadratic formula for

[tex]ax^2+bx+c=0[/tex]

the solution is: (-b±√(b²-4ac))/(2a)

The solution is:

[tex]\sqrt{\frac{(8b^2-9a^2)^2}{576a^2}-\frac{2b^2+5ab+2a^2}{12a} } -\frac{8b^2-9a^2}{24a} \\\\or\\-\sqrt{\frac{(8b^2-9a^2)^2}{576a^2}-\frac{2b^2+5ab+2a^2}{12a} } -\frac{8b^2-9a^2}{24a}[/tex]

this is wrong bc i need a problem not only one number what is the problem for "When I triple my number and add four, I get ten. What is my number?" this

Answers

Answer: 2

Step-by-step explanation:

Let's substitute the number as x in the equation.

Triple means you multiply it by 3.

Then you add four, and get 10.

We can write that like this:

3x + 4 = 10

Then subtract 4 from both sides:

3x = 6

And then divide both sides by 3:

x = 2

So the number is 2.

Quadrilateral M' is the image of quadrilateral M under a dilation.
What is the center of the dilation?

Answers

Answer:

3

Hope that helps!

Step-by-step explanation:

9514 1404 393

Answer:

  D

Step-by-step explanation:

Draw lines through corresponding vertices. Where those lines meet is the center of dilation. It is point D.

HELP ME PLZ

Marta has a bag of 10 orange blocks and 10 purple blocks she selected a block with out looking and return it to the bag she repeats this 20 times ( which charts show result that are most likely )

Answers

i believe it’s 9:11

a teacher invested $600 in an account that paid 2% annual simple interest the teacher did not maker any additional deposits or withdrawals. What is the total amount of interest paid by this investment at the end of 3 years?

Answers

Answer:

$36.00

Step-by-step explanation:

The formula for simple interest is I = P x r x t where P is the principal amount, $600.00, r is the interest rate, 2% per year, or in decimal form, 2/100=0.02, and t is the time involved, 3....year(s) time periods. So t is 3....year time periods. To find the simple interest, we multiply 600 × 0.02 × 3 to get that the interest is $36.00 . Usually now, the interest is added onto the principal to figure some new amount after 3 year(s), or 600.00 + 36.00 = 636.00.

identify the values of a, b, and c for the quadratic function in standard form y=-8x^2+6x-3

Answers

a=8. b=6 3=c is the answer

Parallel lines cut by a transversal...I need X, no decimals.
(Hint: The answer is either 9 or 26)

Answers

Answer:

x = 26

Step-by-step explanation:

These angles are equal b/c of alt exterior angles

9x + 18 = 10x - 8

9x - 10x = -8 - 18

-x = -26

x = 26

help please, i don’t understand

Answers

Answer:

x = 13

Step-by-step explanation:

Since the triangles are congruent by AAS.

6x - 1 = 4x + 25

or 2x = 26

x = 13

please help i’m in a test rn. Consider the geometric sequence -7, 14, -28, .... Select all that apply.
A
The 8th term is –7(-2)
B
The common ratio is 2.
С
The 9th term is greater than the 10th term.
D
The 7th term is 4 times the 5th term.
E
The 5th term of the sequence is -112.

Answers

nsweres el dodeel s  Step-by-step explanationen

people ask me sometimes why can’t you do your homework and I say it’s because I help people with theres and they never help me :((((((

Answers

Answer:

6/6 6= 1

Step-by-step explanation:

may be this Is the ans sorry if l am wrong

36 is divided
6 is divisor
And the =6 is the quotient

PLEASE URGENTLY ANSWER THESE 2 QUESTIONS, I WILL PROVIDE MORE POINTS AND CROWN YOU BRAINLIEST IF YOU DO!!!
-
Use a virtual dice roller or a physical die to roll a die 60 times. record your results in the table below:

Number-----Frequency
1----------------------15
2---------------------13
3---------------------5
4---------------------9
5---------------------8
6---------------------10

What is the proportion of times did you roll a 1? (Already answered)
15 Times (This will be your value of p-hat)

1. Say you want to analyze how likely it is that you rolled the proportion of 1s that you did. Would it be appropriate to use a normal model to figure this out? why or why not?


2. Find the probability that the proportion of 1s that you rolled is less than your value of p-hat. Interpret what you find in context.

Answers

Answer:

1. I would think it would be a appropriate to use a normal model to figure this out because sometimes when you are using stuff online you can get the same number like 20 times in a row, whereas, if you use a real dice, you most likely won't roll the same number 20 times.

2. { sorry two doesn't make sense }

Please help me with question 3 guys

Answers

Equiangular. They are all 90 degrees but they don’t have the same length of sides so they are equiangular meaning equal angles.

im in 7th can i get help on these quetion

Answers

Answer:

so what is the question pls brief it up

Answer:

CAN U CUMMM?

Step-by-step explanation:

14. Find x, y, and z in the figure.
900
2ནས་
15. Find x and y in the figure.
3
4yº (5r-20)

Answers

we know that

The sum of the internal angles in the triangle must be  degrees

see the attached figure with letters to better understand the problem

Step

Find the measure of the angle x

In the triangle ABC

solve for x

therefore

the answer Part a)  is

the measure of angle x is

Step

Find the measure of the angle z

we know that

--------> by supplementary angles

substitute the value of x

therefore

the answer Part b)  is

the measure of angle z is

Step

Find the measure of the angle y

In the triangle ACD

solve for y

therefore

the answer Part c)  is

the measure of angle y is

please help!

1. select all solutions to the equation

3x - y = 10

A). Neither

B). only (3, 1)

C). (4, -2)

D). both (4, -2) and (3, 1)

2. which of the following points are NOT
solutions to the equation? (select all that apply)

y = 5x - 7

A). (1, -2)

B). (3, 8)

C). (1, 2)

D). 0, 1)

E). (-1, -2)

F). (0, -7)

Answers

1. B) only (3,1)

2. A), B) and F)

Alberto pagó el año pasado 350 euros por un servicio de teléfono móvil. Si este año ha pagado 378 euros, ¿qué tanto por ciento ha aumentado en el gasto de teléfono móvil?

Answers

Answer:

the percentage increase is 5.3%

Step-by-step explanation:

The computation of the percentage increase is shown below:

= (Current year - last year) ÷ (last year)

= (378 euros - 359 euros) ÷ (359 euros)

= 19  euros ÷ 359 euros

= 5.3%

hence, the percentage increase is 5.3%

What is the solution for m? 2/3m + 6 = 18

Answers

Answer:

m=18

Step-by-step explanation:

[tex]\frac{2}{3} m+6=18\\\\\frac{2}{3} m=12\\\\m= 18[/tex]

Answer:

18

Step-by-step explanation:

18 - 6 = 12

2/3m = 12

2m = 36

divide by 2

m = 18

really hard problem need help asap

Answers

Answer:

interior angle sum = (Number of sides x 180°) - 360°

interior angle sum = (6 x 180°) - 360° = 720°

∠CDE = (720° - 90° - 90°)/4 = 135°

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