What is the value of the Y coordinate of the solution to the system of equations x-2y=1 and x+4y=7?

Answers

Answer 1

Answer: $\left\{\begin{array}{ccc}x-2y=1\nx+4y=7&/\cdot(-1)\end{array}\right\n\n+\left\{\begin{array}{ccc}x-2y=1\n-x-4y=-7\end{array}\right\n-----------\n.\ \ \ \ \ \ \ \ \ -6y=-6\ \ \ \ \ /:(-6)\n.\ \ \ \ \ \ \ \ \ \ \ \ \ \ y=1\n\nx-2\cdot1=1\nx-2=1\nx=1+2\nx=3\n\nAnswer:\n\left\{\begin{array}{ccc}x=3\ny=1\end{array}\right$

Answer 2

Answer:

Answer:

Step-by-step explanation:

x - 2y = 1

+ (-x - 4y = -7)

_______________________

-6y = -6

-6 -6

We divide -6 both sides of the equation in order to get our answer.

y = 1

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Answers

Answer:

Dude I can't read that are you trying to solve for x?

Step-by-step explanation:

Answer:

x = 15

Step-by-step explanation:

What are the roots of the equation x^2+4x-16=0

Answers

$x^2+4x+16=0 \n \n \Delta=b^2-4ac \n \Delta=4^2-4*1*16 \n \Delta = 16-64 \n \Delta=-48 \n \Delta \ \textless \ 0 =\ \textgreater \ \text{we don't have REAL solutions} \n \n \text{but it can solve with the multitude of complex numbers }\mathbb{C}$

Simplify 28 over 35

Answers

4 / 5
use the 7 to reduce each numer of the fraction

if we simplify 28/35 it will equal 4/5. You use the Greatest Common Factor to divide it which is 7 and it will equal 4/5

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Answers

Answer:

(-2,-3)

Step-by-step explanation:

A=(8,-5)

M=(3,-4)

The difference between them is that m is 5 to the left and 1 up. We need to do the same thing to find B.

B=(-2,-3)

Match the expression with its name. 3x + 7A. linear monomial

B. linear binomial

C. cubic binomial

D. quadratic monomial

Answers

The expression 3x + 7 can be matched with the name B. linear binomial.

To understand why this expression is classified as a linear binomial, let's break down the terms:

Linear: The expression is linear because it is a degree-one polynomial. The highest power of the variable 'x' is 1, and there are no other variables or exponents present.

Binomial: The expression is a binomial because it consists of two terms. In this case, the two terms are 3x (the first term) and 7 (the second term), connected by the plus sign.

A linear binomial represents a straight line when graphed on a coordinate plane, where the variable 'x' represents the horizontal axis, and the resulting expression represents the vertical axis. The term "binomial" indicates that there are two terms in the expression.

In conclusion, the expression 3x + 7 is a linear binomial because it is a degree-one polynomial with two terms: 3x and 7.

To know more about linear binomial:

brainly.com/question/30967878

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Your answer is B. linear binomial.

The difference of two numbers is 20 and their product is 125 what is the answer

Answers

The value of the two numbers will be -25 and -5.

What is an expression?

The mathematical expression combines numerical variables and operations denoted by addition, subtraction, multiplication, and division signs.

Mathematical symbols can be used to represent numbers (constants), variables, operations, functions, brackets, punctuation, and grouping. They can also denote the logical syntax's operation order and other properties.

Given that the difference between the two numbers is 20 and their product is 125. Let the two numbers are x and y.

x - y =20 or x = y + 20

xy = 125

Solve the equations,

y(y+20) = 125

y² + 20y -125 =0

y² +25y - 5y -125=0

y(y + 25) --5(y + 25) = 0

( y + 25 )( y - 5 ) = 0

y = -25 and y = 5

x = y + 20

x = -25 + 20