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Romashka-Z-Leto [24]

2 years ago

12

Solve the system of equations 5x-2y=88 3x+4y=58 show all work

2 answers:

diamong [38]2 years ago

6 0

The given equations are:

5x - 2y = 88
3x + 4y = 58

Multiplying the 1st equation by 2, we get the new set of equations as:

10x - 4y = 176
3x + 4y = 58

Adding the two equations, we get:

10x - 4y + 3x + 4y = 176 + 58
13x =234
x = 18

Using the value of x in 1st equation, we get:

5(18) - 2y = 88
- 2y = 88 -5(18)
-2y = -2
y = 1

So, the solution of the equation is (18, 1)

bagirrra123 [75]2 years ago

3 0

$\left\{\begin{array}{ccc}5x-2y=88&1^o\\3x+4y=58&2^o\end{array}\right\\\\1^o\ 5x-2y=88\ \ \ \ |\text{subtract 5x from both sides}\\-2y=-5x+88\ \ \ |\text{divide both sides by (-2)}\\y=2.5x-44\\\\\text{substitute the value of y to the equation}\ 2^o$

$3x+4\cdot(2.5x-44)=58\\3x+10x-176=58\\13x-176=58\ \ \ |\text{add 176 to both sides}\\13x=234\ \ \ \ |\text{divide both sides by 13}\\x=18\\\\\text{substitute value of x to the equation}\ 1^o\\\\y=2.5\cdot18-44=45-44=1\\\\Answer:\ \boxed{\left\{\begin{array}{ccc}x=18\\y=1\end{array}\right}$

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Maths functions question

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Answer:

a) OA = 1 unit

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Step-by-step explanation:

<u>Given function</u>:

$g(x)=2^x$

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To find the y-value of Point A, substitute x = 0 into the function:

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<h3><u>Part (b)</u></h3>

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The find the x-value of Point C, set the function to 8 and solve for x:

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<h3><u>Part (c)</u></h3>

From parts (a) and (b):

A = (0, 1)
B = (3, 0)

To find the length of AB, use the distance between two points formula:

$d=\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}$

$\textsf{where }(x_1,y_1) \textsf{ and }(x_2,y_2)\:\textsf{are the two points.}$

Therefore:

$\implies \sf AB=\sqrt{(x_B-x_A)^2+(y_B-y_A)^2}$

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$\implies \sf AB=\sqrt{10}\:\:units$

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