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3 years ago

Use addition to solve the linear system of equations. Include all of your work in your final answer.

Mathematics

1 answer:

lys-0071 [83]3 years ago

7 0

Answer:

x=-12, y = 8

Step-by-step explanation:

-x-y=4

x+2y=4

Add these two equations together to eliminate x

-x-y=4

x+2y=4

-----------------

y=8

Now we need to find x

x+2y =4

Substitute y in

x +2(8) =4

x+16 =4

Subtract 16 from each side

x+16-16 =4-16

x=-12

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Y=-6x-4 as integer form

Maksim231197 [3]

Answer:

y=-24

Step-by-step explanation:

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3 years ago

Solving multi-step equations 1) p-1=5p+3p-8

Feliz [49]

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3 years ago

Read 2 more answers

A plane takes off from an airport and flies at a speed of 400km/h on a course of 120° for 2 hours. the plane then changes its co

butalik [34]

Answer:

Distance from the airport = 894.43 km

Step-by-step explanation:

Displacement and Velocity

The velocity of an object assumed as constant in time can be computed as

$\displaystyle \vec{v}=\frac{\vec{x}}{t}$

Where $\vec x$ is the displacement. Both the velocity and displacement are vectors. The displacement can be computed from the above relation as

$\displaystyle \vec{x}=\vec{v}.t$

The plane goes at 400 Km/h on a course of 120° for 2 hours. We can compute the components of the velocity as

$\displaystyle \vec{v_1}=$

$\displaystyle \vec{v_1}=\ km/h$

The displacement of the plane in 2 hours is

$\displaystyle \vec{x_1}=\vec{v_1}.t_1=.(2)$

$\displaystyle \vec{x_1}=km$

Now the plane keeps the same speed but now its course is 210° for 1 hour. The components of the velocity are

$\displaystyle \vec{v_2}=$

$\displaystyle \vec{v_2}=km/h$

The displacement in 1 hour is

$\displaystyle \vec{x_2}=\vec{v_2}.t_2=.(1)$

$\displaystyle \vec{x_2}=km$

The total displacement is the vector sum of both

$\displaystyle \vec{x_t}=\vec{x_1}+\vec{x_2}=+$

$\displaystyle \vec{x_t}=km$

$\displaystyle \vec{x_t}=$

The distance from the airport is the module of the displacement:

$\displaystyle |\vec{x_t}|=\sqrt{(-746.41)^2+492.82^2}$

$\displaystyle |\vec{x_t}|=894.43\ km$

8 0

3 years ago

Can someone help me ?

Lapatulllka [165]

Answer:

A) 1/6

Step-by-step explanation:

Common Ration means you need to divide second term/first term, third term/2nd term

12/72 = 1/6

2/6 = 1/6

Therefore the common ratio is 1/6

3 0

3 years ago

Peter paid $12.83 for a dvd. The price of the dvd was $11.98. How much sales tax did peter pay?

ArbitrLikvidat [17]

Peter paid 0.85 tax which is at 7.1% sales tax

6 0

3 years ago