All categories

3 years ago

- Write the expression you can substitute

Mathematics

2 answers:

irinina [24]3 years ago

7 0

Answer:

y= 13/22

Step-by-step explanation:

x=4-6y

equation: 4x + 2y=3

4(4-6y) +2y = 3

use distributive property

16 - 24y + 2y = 3

Combine and collect like terms:

16 -22y = 3

-22y = 3 - 16

-22y = -13

y= -13/-22

y= 13/22

Hope this helps :)

AveGali [126]3 years ago

4 0

Answer:

4(4-6y) + 2y = 3

Step-by-step explanation: Just substitute x into 4-6y multiplied by 4 since x is by itself in the second equation.

You might be interested in

-6(1 + 2x) + 6x = 6(-3x - 3)

Maksim231197 [3]

Answer:

x = - 1

Step-by-step explanation:

Isolate the variable by dividing each side by factors that don't contain the variable.

PLEASE MARK BRAINLIEST!!

7 0

3 years ago

Help!!!!!

photoshop1234 [79]

c) 45 degrees west of south

7 0

2 years ago

Read 2 more answers

A street light is mounted at the top of a 15-ft-tall pole. A man 6 ft tall walks away from the pole with a speed of 4 ft/s along

mina [271]

Answer:

The tip of the man shadow moves at the rate of $\frac{20}{3} ft.sec$

Step-by-step explanation:

Let's draw a figure that describes the given situation.

Let "x" be the distance between the man and the pole and "y" be distance between the pole and man's shadows tip point.

Here it forms two similar triangles.

Let's find the distance "y" using proportion.

From the figure, we can form a proportion.

$\frac{y - x}{y} = \frac{6}{15}$

Cross multiplying, we get

15(y -x) = 6y

15y - 15x = 6y

15y - 6y = 15x

9y = 15x

y = $\frac{15x}{9\\} y = \frac{5x}{3}$

We need to find rate of change of the shadow. So we need to differentiate y with respect to the time (t).

$\frac{dy}{t} = \frac{5}{3} \frac{dx}{dt}$ ----(1)

We are given $\frac{dx}{dt} = 4 ft/sec$ . Plug in the equation (1), we get

$\frac{dy}{dt} = \frac{5}{3} *4 ft/sect\\= \frac{20}{3} ft/sec$

Here the distance between the man and the pole 45 ft does not need because we asked to find the how fast the shadow of the man moves.

7 0

3 years ago

PLEASE EXPLAIN!

stepladder [879]

Answer:

Step-by-step explanation:

5(2)(3)-2(2)+13+7(2)-6(2)(3)-4(2)+(2)(3)

30-4+13+14-36-8+6

6 0

3 years ago

Group of answer choices Phone A Phone B Phone C Phone D

Otrada [13]

Answer:

Phone B

Step-by-step explanation:

5 0

3 years ago

Read 2 more answers