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melomori [17]
3 years ago
6

Create a model to show that 2(2x+3y)=4x+6y

Mathematics
1 answer:
Tom [10]3 years ago
4 0
You would first do 2 multiplied by 2x and that would give you 4x, then you would do 2 multiplied by 3y which would give you 6y, you would put 4x under 2x and put 6y under 3y and bring down your addition symbol 
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Solve the equation -31=-6z-4z
jok3333 [9.3K]
<span>-31=-6z-4z
Subtract 4z from -6z
-31=-10z
Divide both sides by -10
Final Answer: 3.1 or 3 1/10</span>
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3 years ago
Two motorcyclists, who start their journeys at the same instance from two different cities,
padilas [110]

Answer:

54

Step-by-step explanation:

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2 years ago
A butcher has 7 1/3 pounds of ground bee that will be priced at $1.24 per pound. He divides the meat into 7 equal packages. How
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Answer:

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8 0
3 years ago
An air traffic controller is tracking two planes. To start, Plane A was at an altitude of 352 meters, and Plane B was just takin
barxatty [35]

Answe:

a) Altitude of Plane A (in meters) = 352+24t

Altitude of Plane B (in meters) = 22t

b) 352 + 24t = 22t

Step-by-step explanation:

a) We have that Plane A has an altitude of 352m, and is gaining altitude at 14m/s.

Plane B has an altitude of 0m and is gaining altitude at 22 m/s.

To know the altitudes of Planes A and B we have to add the altitude they have plus the product of the altitude they are gaining and the time in seconds:

An expression for this would be:

Altitude of Plane = x + yt

where:

x is the altitude that they start with, in meters

y is the gaining altitude in m/s

t is the time in seconds

We substitute the values for plane A

Altitude of plane A = 352m + 14m/s *t

We substitute the values for plane B

Altitude of Plane B = 0m + 22m/s*t

Altitude of Plane B = 22m/s*t

b) An equation to show that the two planes are at the same altitude we have to equalize the two expressions of the planes:

Altitude of Plane A = Altitude of Plane B

We can change this to:

352m + 14m/s*t = 22m/s*t

This is the expression.

<em>(To know how much time will it take them to have the same altitude we just have to solve for t:</em>

<em>352 + 14t = 22t</em>

<em>352 = 22t - 14t</em>

<em>352 = 8t</em>

<em>352/8 = t</em>

<em>t = 44 seconds</em>

<em>And the planes will have an altitude of:</em>

<em>Altitude of plane A = 352 + 14*44</em>

<em>Altitude of Plane A = 968 m</em>

<em> </em>

<em>Altitude of Plane B = 22*44</em>

<em>Altitude of Plane B = 968 m)</em>

4 0
3 years ago
A hat has a regular price of w dollars at a thrift store. During a sale, the price of the hat is discounted by 10%. Which expres
lbvjy [14]

Answer:

W - 10% = W

Step-by-step explanation:

you would take the original price of the hat (W) and subtract it by 10% to get the new price of the hat

7 0
3 years ago
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