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umka2103 [35]
4 years ago
12

Solve the system by substitution. Check your solution. a-1.2b=-3 0.2b+0.6a=12

Mathematics
2 answers:
velikii [3]4 years ago
7 0
A - 1.2b = - 3         ⇒ eq. 1
0.2b + 0.6a = 12   ⇒ eq. 2

a - 1.2b = - 3  
a = 1.2b - 3           ⇒ eq. 3

Substitute eq. 3 to eq. 2
0.2b + 0.6(1.2b - 3) = 12
0.2b + .72b - 1.8 = 12
Combine like terms
0.92b = 12 + 1.8
0.92b = 13.8   ⇒ divide both sides by 0.92 to get the value of b
<span>b = 15

</span>Substitute the value of b to eq. 3
a = 1.2b - 3
a = 1.2(15) - 3 
<span>a = 15

</span>to check: substitute the values of a and b to:
eq. 1
a - 1.2b = - 3 
15 - (1.2)(15) = -3 
15 - 18 = - 3 
- 3 = -3    ⇒ correct!

eq. 2 
0.2b + 0.6a = 12 
(0.2)(15) + (0.6)(15) = 12
3 + 9 = 12
12 = 12   ⇒ correct!
ahrayia [7]4 years ago
5 0

Answer:

the answer is A on edgenuity

Step-by-step explanation:

(15,15)

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3 years ago
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. Micro Office Products has issued 5,000 shares of cumulative preferred stock that will earn dividends at $2.38 per share; it ha
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110000 is the total dividends of both preferred stock and common stock
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It’s 50/50 hope this helps
4 0
3 years ago
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Show that triangle MPT =Triangle MTP​
exis [7]

Unusual notation.  I won't fuss with it.

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By the definition of angle bisector, angle MTP = angle MTF, and angle MPT = angle MPU.

We have m angle RTP = m angle MTF + m angle MTP = 2 m angle MTP

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2 m angle MTP = 2 m angle MPT

angle MPT = angle MPT

That's the first part.

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x = 28 degrees

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Bad drawing, PUT looks acute.

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Tan + Cos / 1 + Sin = Sec
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7 0
2 years ago
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