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Leya [2.2K]
1 year ago
13

What is the solution(s) to the system of equations y = x² +4 and y = 2x + 4

Mathematics
1 answer:
bija089 [108]1 year ago
3 0

Answer:

(x,y) = (0,4)~ \text{and}~ (x,y) = (2,8)

Step by step explanation:

y = x^2 +4~~~~~~~~~...(i)\\\\y = 2x +4~~~~~~~~~...(ii)\\\\\text{From (i) and (ii):}\\\\~~~~~~x^2 +4 = 2x+4\\\\\implies x^2 = 2x\\\\\implies x^2 -2x = 0\\\\\implies x(x-2) = 0\\\\\implies x =0,~ x = 2

\text{Substitute x = 0 in eq (i):}\\\\y = 0^2 +4 = 4\\\\\text{Substitute x = 2 in eq (i):}\\\\y=2^2+4 = 4+4 = 8\\\\\text{Hence,}~ (x,y)= \{(2,8), (0,4)\}

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The equation y=2x+3 represents the cost y (in dollars) of mailing a package that weighs x pounds. a. Graph the equation. b. Usin
FinnZ [79.3K]

Answer:

B. Slightly more than $5

Step-by-step explanation:

y = 2x + 3

Firstly we check variables to make sure we understand.

y = dollars

x = pounds

On the scale, it says 1.126 lb. Which means 1.126 pounds.

And so, x = 1.126

y = 2x + 3

y = 2(1.126) + 3

y = 2.252 + 3

y = 2.252

The graph for part a and park b. It is underneath. I wrote 1.1, because it is rounded down from 1.126 lb, which is part b. The one with one line and no dots is part a.

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2 years ago
a system of equations is shown below 7x + 3y= 22. 3x - 3y =18 what is the solution to the system of equations​
Tju [1.3M]

4,-2

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2 years ago
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A particle moves along a straight line with equation of motion
Basile [38]

Answer:

f(t) = 15 + 160 + 1

Step-by-step explanation:

it said that t= 4 and because the t is after the 40 you would times 40 by 4 to get 160. Then you add them all up and there you go you got your velocity and speed.

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What are the solutions to 3x^2+13x=10?​
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Step-by-step explanation:

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Earth is represented on a map of a portion of the solar system so that its surface is the circle with equation x2+y2+8x+2y−4883=
vodka [1.7K]

Answer:

The general form of the equation for the orbit of the satellite is x^{2}+y^{2}+8\cdot x+2\cdot y = 4939.16.

Step-by-step explanation:

From statement we have the general equation of the elliptic form of Earth. First we have to transform this formula to the standard form of the equation of the circle. That is:

1) x^{2}+y^{2}+8\cdot x +2\cdot y -4883=0 Given

2) (x^{2}+8\cdot x)+(y^{2}+2\cdot y) = 4883 Associative, commutative and modulative properties/Compatibility with addition/Existence of additive inverse.

3) (x^{2}+8\cdot x +16)+(y^{2}+2\cdot y+1)-17=4883 Associative, commutative and modulative properties/Compatibility with addition/Existence of additive inverse.

4) (x+4)^{2}+(y+1)^{2} = 4900 Square perfect trinomial/Result

According the result, the center of Earth is C(x,y) = (4, 1) and the square of the radius of Earth equals 4900. That is: r = 70

If satellite circles 0.4 unit above Earth, then the equation of the orbit of the satellite is:

(x+4)^{2}+(y+1)^{2}=70.4^{2}

(x+4)^{2}+(y+1)^{2} = 4956.16

Now we transform this into its general form:

1) (x+4)^{2}+(y+1)^{2} = 4956.16 Given

2) x^{2}+8\cdot x +16+y^{2}+2\cdot y+1 = 4956.16 Square perfect trinomial

3) x^{2}+y^{2}+8\cdot x+2\cdot y = 4939.16 Associative, commutative and modulative properties/Compatibility with addition/Existence of additive inverse/Result

The general form of the equation for the orbit of the satellite is x^{2}+y^{2}+8\cdot x+2\cdot y = 4939.16.

6 0
3 years ago
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