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irinina [24]
3 years ago
15

Hello, I need help solving the system of equations by substitution method.

Mathematics
2 answers:
Llana [10]3 years ago
8 0
4x + 2y = 108
x = -5y

4(-5y) + 2y = 108
-20y + 2y = 108
<u>-18x</u> = <u>108</u>
 -18     -18
     x = 6
4(6) + 2y = 108
  24 + 2y = 108
<u>- 24           - 24</u>
           <u>2y</u> = <u>84</u>
            2      2
             y = 41
        (x, y) = (6, 41)
mash [69]3 years ago
5 0
4(-5y) + 2y = 180

-20y + 2y = 180

-18y = 180

y = -10
x = 50
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Which equations illustrate the associative property of addition? Choose exactly two answers that are correct.
sveticcg [70]
Solutions 

Associative Property is a rule that refers to grouping. The rule is "<span>a + (b + c) = (a + b) + c</span><span>". 
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The correct answers are (A) and (D) 

(A) = <span> (11 + 2.2) + (–5) = 11 + [2.2 + (–5)] 

(D) = </span><span>–7 + [4 + (–2.1 • 6)] = (–7 + 4) + (–2.1 • 6)</span> 
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4 years ago
Is the point on the line ?
Oxana [17]

Answer:

i think the answer is no i used tge desmo graphing calculator and tht point wasnt on it

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3 years ago
A flying squirrel jumped from a tree 11 feet in the air at the initial velocity of 9 ft./s the equation H equals negative 2T squ
Nady [450]

Answer:

The squirrel maximum height (h) = 21.125 ft

Step-by-step explanation:

The objective of this question is to determine the squirrel's maximum height.

Given that:

h = -2t² + 9t + 11

Differentiating h with respect to t, we get;

\dfrac{dh}{dt}= -4t +9

At the time dh/dt = 0, the velocity is maximum

Thus;

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t = 2.25 seconds

From;

h = -2t² + 9t + 11

h = - 2(2.25)² + 9(2.25) + 11

h = - 10.125 + 20.25 + 11

h = 21.125 ft

4 0
3 years ago
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zlopas [31]

Answer:

A triangle has angle measures of 45, 110, and 25 degrees would has an orthocenter outside the triangle.

Hope this helps!

:)

8 0
3 years ago
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gregori [183]
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Ratcliff

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8 0
3 years ago
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