6x-4y=54
-9x+2y=-6
substitution

Answers

Answer 1

Answer: $\left \{ {{6x-4y=54} \atop {-9x+2y=-6\ \ | *2}} \right. \n\n \left \{ {{6x-4y=54} \atop {-18x+4y=-12}} \right. \n+-----\naddition\ method\n\n-12x=42\ \ \ | divide\ by\ -12\nx=-3.5\n\n2y=-6+9x\ny=(-6+9x)/(2)=(-6+31.5)/(2)=(25.5)/(2)=12.75\n\n \left \{ {{y=12.75} \atop {x=-3.5}} \right.$

Answer 2

Answer: -9x + 2y = -6 and that's how u solve it and u can thank me wants u get it right lol

Related Questions

Evaluate the exact value: tan(pi/6)
PLEASE HELP, CURRENTLY STUCK ON THIS QUESTION ! Find the general term for the sequence -3, 1, 5, 9, ....
2x-1/6 = 2(x-3)/3 + 1?
Markus scored 85, 92, 82, and 94 on the first four tests of the semester. His teacher has not yet told him his score on his fifth test, but did tell him that his score on the fifth test is five points lower than the average (arithmetic mean) of all five tests. Which equation could Markus use to determine the score of the fifth test, x?
The two lines represent the distance traveled by Noah and Diego. Which person is running more quickly? Explain how you know.

Which of the following is equivalent to √-50a) 5√2
b) 5i√2
c) 5√2i
d) -5√2

Answers

$√(-50)=√(-1\cdot50)=√(-1)\cdot√(50)=i√(25\cdot2)=i√(25)√(2)=\boxed{5i√(2)}$

Answer b)

Option (D) is the answer
-5 root2

Triangle PQR is right angle at Q. |PQ| = 3a cm and |QR| =4a cm. Determine |PR| in terms of a

Answers

A^2 + B^2=C^2 Pythagorean’s Theorem

(3a)^2 + (4a)^2 = C^2

9a^2 + 16a^2 = C^2

a^2(9+16) = C^2

a^2(25) = C^2

sqrt ((a^2(25)) = sqrt (C^2)

5a=C=|PR|

shortcut would have been to recognize a 3-4-5 triangle

Caroline has $2.55 in her purse and nickels and dimes. the number of nickels is nine less than three times the number of dimes. find the number of each type of coin.

Answers

An equation is formed when two equal expressions. The number of dimes and nickels in Caroline's purse is 12 and 27, respectively.

What is an equation?

An equation is formed when two equal expressions are equated together with the help of an equal sign '='.

Let the number of dimes in Caroline's purse be represented by x, while the number of nickels is represented by y.

Given that the number of nickels is nine less than three times the number of dimes. Therefore, we can write,

y = 3x - 9

Also, Caroline has a total of $2.55 in her purse. Therefore, we can write,

0.10x + 0.05y = 2.55

Substitute the value of y from the above equation,

0.10x + 0.05(3x - 9) = 2.55

0.10x + 0.15x - 0.45 = 2.55

0.25x = 2.55 + 0.45

0.25x = 3

x = 3/0.25

x = 12

Substitute the value of x in the equation of y,

y = 3x - 9

y = 3(12) - 9

y = 36 - 9

y = 27

Hence, the number of dimes and nickels in Caroline's purse is 12 and 27, respectively.

Learn more about Equation here:

brainly.com/question/14686792

#SPJ2

.05N+.1d=2.55
N=3d-9
0.05(3d-9)+0.1d=2.55
0.15d-0.45+0.1d=2.55
0.25d=2.55+0.45
0.25d=3
D=12
N=3(12)-9
N=36-9
N=27
Hope this helps

Which value of x is in the solution set of 4/3x +5 < 17?would the answer be 8 or 9?

Answers

Well, 4/3x<12, 1/3x<3, x<9
All numbers below 9 are in the set. 9 itself isn't.

Answer:

the answer would be 8

Step-by-step explanation:

Why do u think each letter in a polygon's name can be used only once

Answers

It is not true.

An octagon is a polygon of 8 sides. The letter "o" appears in octagon two times.

If f(x) = 3x + 10 and g(x) = 2x - 4, find (f+g)(x).O A. (f+g)(x) = -34 - 2x - 14
B. (f+ g)(x) = 3x - 2x + 14
O C. (f+ g)(x) = 5x + 6
D. (f+ g)(x) = 3x + 2x + 6

Help! I’m getting really confused which one it is