3 years ago

Solve by substitution 1. 6x+ 5y=7 x-y=3 2. 3a +2b =4 2a + b=6 3. 2x + y= 4 4x -y=2

Mathematics

1 answer:

Juli2301 [7.4K]3 years ago

8 0

Answer:

1. y = 11

x = -48

2. a =8

b= -10

3. x= 1

y= 2

Step-by-step explanation:

1 . 6x + 5y = 7

x-y= 3

6x+5y = 7

6x-6y =18

-1y = - 11

6x + 5y = 7

y = 11

6x + 55 = 7

6x = -48

x = -48

You might be interested in

What is the value of x in the equation 3x -1/9 y = 18, when y = 27? 5 7 45 63

almond37 [142]

Answer:

$x=7$

Step-by-step explanation:

we have

$3x-\frac{1}{9}y=18$

Substitute the value of y=27 in the equation and find the value of x

$3x-\frac{1}{9}(27)=18$

$3x-3=18$

$3x=18+3$

$3x=21$

$x=7$

4 0

3 years ago

A cylindrical container has a radius of 0.3 meter and a height of 0.75 meter. The container is filled with kerosene. The density

saveliy_v [14]

Answer:

172.83 kg

Step-by-step explanation:

A cylindrical container has a radius (r) of 0.3 meter and a height (h) of 0.75 meter and density of 815 kg/m³.

The density of a substance is the mass per unit volume, it is the ratio of the mass of a substance to the volume occupied. The density is given by the formula:

Density = Mass / volume

The volume of a cylinder is given as:

V = πr²h

V = π × (0.3)² × 0.75 = 0.212 m³

Density = Mass/ volume

Mass = Density × Volume

Mass = 815 kg/m³ × 0.212 m³

Mass = 172.83 kg

6 0

3 years ago

Simplify each expression, #1: 4(f+2g) - 4g +f. #2: 5g(9m-2) + 3g

Serjik [45]

Answer:

1) 5f

2) 45gm-7g

Step-by-step explanation:

hope this helped!

7 0

3 years ago

Find the area a and b circumference of the circle with radius 10 m and use 3.14 for pi

zhenek [66]

Answer:

$\rule6cm99999cm$

6 0

2 years ago

Read 2 more answers

Determine the average rate of change between x=-1 and x=1.

Olegator [25]

Answer:

Step-by-step explanation:

5 0

3 years ago