All categories

3 years ago

Which equation has (2, -1) as a solution

Mathematics

1 answer:

Valentin [98]3 years ago

3 0

Answer:

C. $y=x-3$

Step-by-step explanation:

To find the answer to the problem, you plug in the values for $x$ and $y$ .

Let's plug them in and see which equation is true.

---------------------------------------------

$-1=2(2)-1\\-1=4-1\\-1=3$

Not true.

---------------------------------------------

$-1=2+3\\-1=5$

Not true.

---------------------------------------------

$-1=2-3\\-1=-1$

True.

---------------------------------------------

$-1=-2(2)-1\\-1=-4-1\\-1=-5$

Not true.

---------------------------------------------

You might be interested in

Solve the following equation for y.<br>x-5y=-18<br>

olganol [36]

Answer:

y=15x+185

Step-by-step explanation:

Step 1: Add -x to both sides.

x−5y+−x=−18+−x

−5y=−x−18

Step 2: Divide both sides by -5.

−5y−5=−x−18−5

y=15x+185

6 0

3 years ago

Which expressions are equal to a(6−2a) ?Select each correct answer.

marysya [2.9K]

Answer: e. $6a-2a^{2}$

Step-by-step explanation:

1. You have the following expression given in the problem:

$a(6-2a)$

2. To solve the exercise and find an equal expression, you must simplify that expression. Apply the Distributive property. Multiply the terms inside the parentheses by $a$ . Then, you obtain:

$a(6-2a)=(a)(6)-(a)(2a)=6a-2a^{2}$

8 0

3 years ago

WILL VOTE BRAINLIEST TO THE FIRST CORRECT ANSWER

KonstantinChe [14]

Answer:

Step-by-step explanation:

The D answer choice is the correct functions needed to create the pictured graph, I have pictured these functions in a graphing calculator below

7 0

2 years ago

Lebron wants to put a fence around a community garden plot. The plot is a rectangular shape with a length twice as long as its w

tatyana61 [14]

Answer:

60 feet of fencing

Step-by-step explanation:

Let x feet be the width of the garden plot, then 2x feet is the length of the garden plot.

The area of the garden plot is

$A=x\cdot 2x\\ \\200=2x^2\\ \\100=x^2\\ \\x=10\ feet\\ \\2x=20\ feet$

Find the perimeter of the rectangular garden plot:

$P=x+2x+x+2x\\ \\=10+20+10+20\\ \\=60\ feet$

5 0

3 years ago

Read 2 more answers

Sabendo que x2 + y2=74 e que xy=35, calcule valor de (x - y2)2

Ann [662]

To solve this problem you must apply the proccedure shown below:

1. You have the following information given in the problem above:

- x²+y²<span>=74
xy=35

2. Therefore, you have that (x-y)</span>² is:

=(x-y)²
=x²-2xy+y²
=(x²+y²)-2xy

3. When you substitute the values given in the problem, you obtain:

=74-2(35)
=74-70
=4

4. Therefore, as you can see, the correct answer is: 4

6 0

3 years ago