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noname [10]
3 years ago
6

Solve the system by substitution. Check your solution.

Mathematics
1 answer:
Zepler [3.9K]3 years ago
3 0

Answer:

a.  (15, 15)

Step-by-step explanation:

We start with those two equations:

1) a - 1.2b = -3

2) 0.2b + 0.6a = 12

We'll begin by modifying equation #1 to isolate a:

a = -3 + 1.2b

Then we'll use this value for a in the second equation:

0.2b + 0.6 (-3 + 1.2b) = 12

0.2b - 1.8 + 0.72b = 12

0.92b = 13.8

b = 15

Then we'll place that value of b in the first equation to find a:

a - 1.2 (15) = -3

a - 18 = -3

a = 15

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<img src="https://tex.z-dn.net/?f=%5Csqrt%7B272%7D" id="TexFormula1" title="\sqrt{272}" alt="\sqrt{272}" align="absmiddle" class
lozanna [386]

√272 is a real number, and the simplified expression of √272 is 4√17

<h3>How to simplify the expression?</h3>

The expression is given as:

√272

Expand

√272 = √16 * 17

Take the square root of 16

√272 = 4√17

Hence, the simplified expression of √272 is 4√17

Read more about real numbers at:

brainly.com/question/7784687

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7 0
2 years ago
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damaskus [11]
0.367 centimeters squared

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3 years ago
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SCORPION-xisa [38]
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6 0
4 years ago
Describe the transformation that maps the pre-image A to the image A.
jolli1 [7]

Answer:

C) translated 1 unit to the left and then rotated 180° counterclockwise about the origin

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3 0
3 years ago
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suter [353]
To solve for the slope given two lines, use the formula:

(y₂ - y₁)
----------
(x₂ - x₁)

Set one of the points as (x₁, y₁), and the other as (x₂, y₂).

(x₁, y₁) = <span>(0,32)
</span>(x₂, y₂) <span>= (100,212)

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</span>(y₂ - y₁)         (212 - 32)     (180)
----------    =  -------------- = -------
(x₂ - x₁)         (100 - 0)       (100)


180/100 
is your slope

If you want simplified, it will be: 9/5

hope this helps


5 0
3 years ago
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