All categories

4 years ago

Solve system of equation by substitutionx-2y=3, 4x-8y=12

1 answer:

8 0

Set a y equation or x equation
x-2y=3
x= 2y+3
plug in the x equation to the other equation
4x-8y=12
4 (2y+3)-8y=12
8y + 12 -8y=12
0=0?? I think this means y=0
plug in the y value to the x equation
x= 2 (0) +3
x= 3
points (3,0)

You might be interested in

Write a linear equation for the statement below:

liberstina [14]

Answer: y = $\frac{-19}{2} x + \frac{219}{2}$

Step-by-step explanation:

1. Find the slope

2. Substitute the slope, along with x and y coordinates into linear equation to solve for y-intercept

3. Write equation

I'm kind of late but if you need more help, feel free to ask :)

6 0

3 years ago

Can someone please help me

Ksenya-84 [330]

There are 24 right handed people and 6 left handed people.

3 0

3 years ago

What is the measure of each angle foreign by the intersection

skad [1K]

300 degrees

Step-by-step explanation:

4 0

2 years ago

Dan bought x pounds of potatoes for $0.85 per pound and y pounds of grapes for $1.29 per pound. The total cost was less than $5.

aleksandrvk [35]

Answer:

0.85x+1.29y<

Step-by-step explanation:

bc x is potatoes for 0.85 and y is 1.29 and the cost was less than 5 u have to write it how it is written in the word problem

8 0

3 years ago

The number of milligrams of a certain medicine a veterinarian gives to a dog varies directly with the weight of the dog. If the

serg [7]

Answer:

$d = \frac{1}{50} k$

Step-by-step explanation:

Let

w be the weight of the dog

and

d be the dosage given to the dog

As both of them are directly proportional

d ∝ w

Whenever the proportion symbol is removed from proportion, a proportionality constant is introduced.

So,

d = kw Eqn 1

As we are given the values of d and w, putting the values

3/5 = 30k

$\frac{3}{5*30} = k$

$\frac{3}{150} = k$

So,

k = 1/50

Putting

K=1/50 in Eqn 1

$d = \frac{1}{50} k$

So d = 1/50 * k relates dosage and weight ..

7 0

3 years ago