3 years ago

1. x = y x – 3y = 4 Substitution

Mathematics

1 answer:

adelina 88 [10]3 years ago

6 0

Answer:

put the value of x

y-3y=4

-2y=4

-y=2

y=-2

in x-3y=4 put the value of y

x-3(-2) =4

x+6=4

x=4-6

x=-2

You might be interested in

Solve and write solution in interval notation 4(x+1)+3>x-5

soldi70 [24.7K]

Answer:

$\large\boxed{x\in\left(-\dfrac{13}{3},\ \infty\right)}$

Step-by-step explanation:

$4(x+1)+4>x-5\qquad\text{use the distributive property}\\\\4x+4+4>x-5\\\\4x+8>x-5\qquad\text{subtract 8 from both sides}\\\\4x>x-13\qquad\text{subtract}\ x\ \text{from both sides}\\\\3x>-13\qquad\text{divide both sides by 3}\\\\x>-\dfrac{13}{3}\to x\in\left(-\dfrac{13}{3},\ \infty\right)$

3 0

3 years ago

Mr. Walker drove for 4 hours at an average rate of 48 miles per hour. How far did he drive ( here's my Buber so you can help mor

GaryK [48]

He drove = 48 * 4 = 192 miles

Hope it helps!

5 0

3 years ago

Read 2 more answers

A cube has a volume of 1/8. If the cube holds 24 of these sugar cubes, what is the total volume of the box?

svetlana [45]

$\frac{1}{8} \div 24 = 3$

8 0

3 years ago

Read 2 more answers

If k(x) = 2x² -3.Vx, then k(9) is

Alexus [3.1K]

Answer:

159

Step-by-step explanation:

k (9) = (2 * $9^{2}$ ) - 3

= (2 * 81) - 3

= 162 - 3

= 159

8 0

2 years ago

Somebody please help me

Elan Coil [88]

4x=6x-14

First isolate the variables onto one side and the numbers on the other so subtract 4x from both sides of the equation and add 14 to both sides of the equation to get 14=2x then you are going to want to completely isolate the variable so you divide 2 on both sides to get an answer of X=7

4 0

3 years ago