4x - 5y - z= 18
-2x - 5y -2z= 12
-2x + 5y + z = 4

Answers

Answer 1

Answer:

x=-4, y=0, z=-2

Step-by-step explanation:


Related Questions

A monsoon dumped rain on a coastal area. in twelve hours 20 inches of rain had fallen. how much rain will fall over a period of 2 days, if it continues to rain at a constant rate?​

Answers

Answer:

80

Step-by-step explanation:

If in 12 hours 20 inches falls in 24 hours 40 inches will fall and another 12 hours would be 60 inches. And another 12 hours you will get 2 days so your answer is 80

please


3. Napoli's in Gateway Plaza sells a cheese pizza for $12.14, with toppings costing $1.44 each. If Jediah ends up paying $19.34 for his pizza, how many toppings did he get?​

Answers

Answer: 5

Step-by-step explanation: you subtract 12.14 from 19.44 to get the amount of money he paid for the toppings alone which is 7.4. Then do 7.4/1.44 to get 5 toppings.

What is 1/8(2-x) -2/3( x - 3/4) + 2x = 13

Answers

Answer:

x=10[tex]\frac{4}{29}[/tex]

Step-by-step explanation:

Answer:

x=294/29

Step-by-step explanation:

u simplify and u get

3(2-x)-16(x-3/4)+48x=312

which is

29x+18=312

then u simplify it again

29x=294 which u get

x=294/29

What is equivalent to (2.0x10^3)(2.0x10^4)

Answers

Answer:

40,000,000

Step-by-step explanation:

to make 5 smoothies that have the same ratio of apple juice to orange juice as 1 smoothie does, how much apple juice and orange juice should sarah use? explain

Answers

Answer:

She must use the ratio into 5.

Step-by-step explanation:

example- say the ratio is 2:3 so she must use 10:15 .

4.7 x 6.8. help pls​

Answers

Answer:

4.7 * 6.8 = 31.96

Step-by-step explanation:

4 is 1/4 of what number?​

Answers

Answer:

16

Step-by-step explanation:

4 1/4

8 1/4

12 1/4

16 1/4

Let the number be x
4 = 1/4x
4 x 4 = x
x = 16

The box plot represents the distribution of speeds, in miles per hour, of 100 cars as they passed
through a busy intersection.
4.
8 12 16 20 24 28 32 36 40 44 48

Answers

Answer:

Median is 28

Step-by-step explanation:

Median is 28 smallest value is 8

Help needed ASAP will give brainliest and 5 STAR RATE (not a real test)

Answers

Answer:

(0,0), (0,1), (1,2), (1,3)

Step-by-step explanation:

To determine what makes ordered pairs a function, we have to make sure each input (x) goes to exactly one output (y).

The reason this is the answer is that each input doesn't have exactly one output. (0 goes to 0 and 1. 1 goes to 2 and 3).

give a numerical example that shows these are not the same expressions. 2(n+5) and 2n+5

Answers

Answer:

The two are different expressions because when you distibute, you multiply all terms inside the parenthesis with the 2 in the first one: 2(n+5) = 2n + 10.

2n + 10 ≠ 2n + 5.

Step-by-step explanation:

Answer: Any number that isn’t 1, 2, -1, or -2 I believe.

Step-by-step explanation: In the first expression, you have to distribute the 2, making it equal to 2n + 10, whereas the first is just 2n + 5.

For example if you were to plug the number 3 into this, you would have 2(3+5), which is 2(8) = 16. Versus the other side, 2(3)+5 = 11

F(x) = x + 4: find f(4) and f(x) = 10

Answers

Answer:

f(4) = 8

f(6) = 10

Step-by-step explanation:

Step 1: Define

f(x) = x + 4

f(4) is x = 4

f(x) = 10

Step 2: Find f(4)

f(4) = 4 + 4

f(4) = 8

Step 3: Find f(x) = 10

10 = x + 4

x = 6

I've attached a picture plz help

Answers

Answer:

Did they say what the a and b are worth

Step-by-step explanation:

Answer:

8a + 6b = 3

Step-by-step explanation:

Simplifying

8a + 6b = 3

Solving

8a + 6b = 3

Solving for variable 'a'.

Move all terms containing a to the left, all other terms to the right.

Add '-6b' to each side of the equation.

8a + 6b + -6b = 3 + -6b

Combine like terms: 6b + -6b = 0

8a + 0 = 3 + -6b

8a = 3 + -6b

Divide each side by '8'.

a = 0.375 + -0.75b

Simplifying

a = 0.375 + -0.75b

If h(x) = {(0, -9), (5,2), (8, -3), (10, 11)}, which set of ordered pairs represents
the inverse of h(x)?
O A. {(0,9),(-5, -2), (-8,3), (-10,-11)}
O B. {(-9, 0), (2,5), (-3, 8), (11, 10)}
C. {(0, -9), (5,2), (8, -3), (10, 11)}
D. {(9,0), (-2,-5), (3, -8),(-11, -10)}

Answers

Answer:

B

Step-by-step explanation:

Consider the figure below where l2 intersects l1 and m∠2=90°.

YOOOO HELP ME PLEASE ASAP LOL ILL MARK YOU AS THE BRAINLEST


Which of the following statements are correct? Select all that apply.

∠1 and ∠4 are adjacent angles.
∠1 and ∠2 are complementary angles.
∠3 and ∠4 are adjacent angles and complementary angles.
∠5 is a vertical angle to the combination of ∠3 and ∠2.
∠1 and ∠3 are vertical angles.
∠4 and ∠5 are adjacent angles, supplementary angles, and form a linear pair.
There is at least one angle bisector in the above graph.

Answers

Answer:

Layla bu la 520 and glue 729

Step-by-step explanation:

Find the midpoint.
(-1,6) and (14,9)

Answers

(6.5,7.5) is the midpoint c

Use the ruler to measure the length of Rs to the nearest centimeter.


cm


1


2


3


4


5


7


8


9


10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30


7


8


9 10 11


[Not drawn to scale]


The length of RS is


centimeters

Answers

Answer:

18cm

Step-by-step explanation:

Find the image to the question attached.

From the ruler, we are to find the distance between R and S i.e RS

From the ruler, R is on 8 and S is on 26.

Initial point R = 8

Final point S = 26

Length of RS = Final point S - initial point R

RS = 26 - 8

RS = 18

Hence the length of RS is 18cm

Account A and Account B both have a principal of $2,000 and an annual interest rate of 2%. No additional deposits or withdrawals are made. Account A earns simple interest. Account B earns interest compounded annually. Compare the amounts in the two accounts after 20 years. Which earns more interest? How much more?


After 20 years, account (A or B) will have earned $____ more.

Answers

Answer:

Account B earns more interest.

After 20 years, account B will have earned $171.89 more.

Step-by-step explanation:

Let's calculate the total for each account.

Account A:

Account A earns simple interest. We know that the principal value is $2000 and the interest rate is 2% or 0.02. We can use the simple interest formula:

[tex]A=P(1+rt)[/tex]

Where A is the future value, P is the principal, r is the rate, and t is the time in years.

So, let's substitute 2000 for P, 0.02 for r, and 20 for t. This yields:

[tex]A=2000(1+0.02(20))[/tex]

Multiply and add:

[tex]A=2000(1+0.4)=2000(1.4)[/tex]

Multiply. So, the total amount of money in Account A after 20 years is:

[tex]A=\$2800[/tex]

Since we initially deposited $2000 and our total is now $2800, this means that we earned an interest of [tex]2800-2000=\$ 800[/tex]

Account B:

Account B earns compound interest. Like Account A, Account B has a principal value of $2000 and the interest rate is 2% or 0.02. We also know that it's compounded annually, so once per year. We can use the compound interest formula:

[tex]B=P(1+\frac{r}{n}})^{nt}[/tex]

Where B is the future value, P is the principal, r is the rate, n is the times compounded per year, and t is the time in years.

So, let's substitute 2000 for P, 0.02 for r, n for 1 (since it's compounded annually), and t for 20. This yields:

[tex]B=2000(1+\frac{0.02}{1})^{(1)(20)}[/tex]

Simplify this to acquire:

[tex]B=2000(1.02)^{20}[/tex]

Evaluate. Use a calculator. So, after 20 years, the amount of money in Account B is:

[tex]B\approx\$2971.89[/tex]

Since our principal was $2000, this means that we earned an interest of approximately  [tex]2971.89-2000=\$ 971.89[/tex].

So, Account A earned an interest of $800 and Account B earned an approximate interest of $971.89.

So, Account B earned more interest.

And it earned [tex]971.89-800=\$ 171.89[/tex] more than Account A.

And we're done!

The slope of a line is the ratio of the
A.
vertical change to the horizontal change between any two points on the line.
B.
x-intercept to the y-intercept.
C.
y-intercept to the x-intercept.
D.
horizontal change to the vertical change between any two points on the line.

Answers

Answer:

A.

vertical change to the horizontal change between any two points on the line.

Step-by-step explanation:

slope is the ratio of the vertical and horizontal changes between two points on a surface or a line. The vertical change between two points is called the rise, and the horizontal change is called the run. The slope equals the rise divided by the run: . This simple equation is called the slope formula.

The slope of a line is the ratio of the : A.  Vertical change to the horizontal change between any two points on the line.

The slope of a line is the gradient of a line and it describes (represents) both the direction and steepness of an equation of a straight line.

Mathematically, the slope of a line is calculated by using this formula;

[tex]Slope. \;m = \frac{Change \; in \; y \;axis}{Change \; in \; x \;axis} \\\\Slope. \;m = \frac{y_2 - y_1}{x_2 - x_1}[/tex]

Hence, the slope of a line is the ratio of the change in y-axis (vertical) to the change in x-axis (horizontal) of a line.

Additionally, the standard form of an equation of line is given by the following formula;

[tex]y = mx + b[/tex]

Where:

x and y are the points. m is the slope. b is the intercept.

In conclusion, the ratio of the  vertical change to the horizontal change between any two points on the line is the slope of a line.

Read more: https://brainly.com/question/18123312

Quadrilateral ABCD is a parallelogram. If m

Answers

Answer: Angle D would be the same as Angle B so the answer is 49 degrees.

Step-by-step explanation:

Yes it is a parallelogram

8y- 10 =
What is y ?

Answers

8y-10=
+10 +10
8y = 10
/8 /8

Y= 1.25

Carl worked 5 hours anand made a total of $42.50. The equation 42.50/5 = 153/x can be used to determine the number of hours, x, it will take him to earn $153. How many hours will Carl need to work to earn $153?
A. 15 hours
B. 17 hours
C. 18 hours
D. 21 hours

Answers

Answer: c

Step-by-step explanation: divide 42.50 by 5 and then divide your answer (8.3) to 153

Answer:

C. 18 Hours

Step-by-step explanation:

Can someone pleaseeee help meee
16.Edwin scored 64 points in 4 games of basketball. At the same rate, how many points
can she score in 15 games?

Answers

64/4 = 16 per game
16 x 15 = 240 in 15 games

240 (Answer)

Hope this helps

Answer:

in 15 games, she will score 240 points

8(b+1)=-3(2+b) simply​

Answers

Step-by-step explanation:

8(b+1)=-3(2+b)

8b+8=-6-3b

8b +3b = -6-8

11b = -14

b = -14/11

(7n7 − 4n6 − 14) − (2n7 + 15n6+ 11)

Answers

Answer: 5n^2 -19n^2-25

Step-by-step explanation: combine like terms / distribute

Find the percent increase. Round to the nearest percent.
From 17 friends to 19 friends

Answers

I do believe it would be 12 percent, if rounded.

Help me pls I am confused for al parts of this pls help.

Answers

Answer:

i think it's 5/4

Step-by-step explanation:

Triangle DEF contains two congruent acute angles. The sum of the measures of the two congruent acute angles is greater than 90 degrees. Anna concludes that the triangle must be an acute triangle. Which best describes her conclusion?

She is correct. A triangle having at least one acute angle is an acute triangle.
She is correct. The remaining angle of the triangle measures less than 90 degrees.
She is incorrect. The angles measure greater than 90 degrees so the triangle is obtuse.
She is incorrect. The third angle in a triangle with two congruent acute angles is a right angle.

Answers

Answer:

She is correct. The remaining angle of the triangle measures less than 90 degrees

Step-by-step explanation:

Edgunity

Anna is correct. The remaining angle of the triangle measures less than 90 degrees.

What are acute angles?

Acute angles are angles that measures less than 90 degrees.  

Triangle DEF contains 2 congruent  acute angles. This means each of those 2 acute angles in the triangle are less than 90 degrees.

The sum of the measure of the two congruent acute angles is greater than 90 degrees.

Therefore,

let

∠D and ∠E be the acute angles.

∠D + ∠E > 90°

An acute triangle:

An acute-angled triangle is a type of triangle in which all the three internal angles of the triangle are acute, that is, they measure less than 90°.

The sum of angles of a triangle is 180 degrees.

Since ∠D + ∠E > 90°, then ∠F must be less than 90 degrees.

This simply means the triangle is an acute-angled triangle. Therefore,

Anna is correct.

learn more on acute angles here: https://brainly.com/question/1634742?referrer=searchResults


Geometry: CC 2015 > Chapter 2: Chapter 2 Test >
Conjecture: Twice the number of units in the length of any side of a rectangle is equal to the number of square units in the area of the rectangle.


The area of ABDE is 4 and 2 X AB = 4

The area of ABCF is 2 and 2 x BC = 2.
The area of ABCF is 2 and 2 x AB = 4

The area of ABDE is 4 and 2 x BD = 4
The statement proves that the conjecture is

Answers

Answer:

The area of ABCF is 2 and 2 × AB = 4

The statement proves that the conjecture is false

Step-by-step explanation:

A conjecture is a proposition or conclusion that is presumed to be true or correct but which is based on incomplete details or information

Given the length of the sides of rectangle ABDE, we have;

Length AB = 2 units

Length DE = 2 units

The area of ABDE = 2 × 2 = 4 unit²

Therefore, the area of the rectangle ABDE is equal to 2 × the length of either AB or DE

However, the are of rectangle ABCF = 2 × 1 = 2 unit²

While the area of rectangle 2 × the length of side AB = 2 × 2 = 4 unit², which is not equal to the number of square units in the area of the rectangle.

Therefore;

The area of ABCF is 2 and 2 × AB = 4

The statement (above) proves that the conjecture is false.

Is 0.2971 irrational?

Answers

Answer:

Yes

Step-by-step explanation:

An irrational number can be written as a decimal, but not as a fraction. An irrational number has endless non-repeating digits to the right of the decimal point.

Answer:

yes

Step-by-step explanation:

Lorenzo has 4 packages of granola bars. Each package has 10 bars. He eats one bar from each package.

Answers

Answer:

4x10-4=36

Step-by-step explanation:

Lorenzo ate 1 bar from each. so 36 is left.

Answer:

4 × 10 - 4 = 36 granola bars

Step-by-step explanation:

4 packages with 10 bars each means 40 bars (4 packages × 10 bars each = 40 bars total)

one bar from each package

there are 4 packages so if he eats only one from each then he eats 4 bars total

40 bars total - 4 bars he ate = 36 bars left over

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