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alexgriva [62]
2 years ago
8

Solve the system using elimination.

Mathematics
1 answer:
Alchen [17]2 years ago
7 0
\left \{ {{7x+5y=15\ \ |*4} \atop {-6x-4y=-14\ \ |*5}} \right. \\\\ \left \{ {{28x+20y=60} \atop {-30x-20y=-70}} \right. \\+------\\
-2x=-10\ \ \ |Divide\ by\ -2\\
x=5\\\\
5y=15-7x\\
5y=15-7*5\\
5y=15-35\\
5y=-20\ \ \ |:5\\
y=-4\\\\\ Solution\ is\ B(5,-4).
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The ratio 4/7 to 8/9 has the unit rate 9/14
Setler79 [48]

Answer:

Answer:

true

Step-by-step explanation:

4/7 = 8/9

= 4*9/7*8

= 36/56

= 2*2*3*3/2*2*2*7

= 9/14

proved

Step-by-step explanation:

6 0
2 years ago
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Answer:

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Step-by-step explanation:

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8 0
2 years ago
Please help with this question
Iteru [2.4K]

Answer:

Inequality Form:

x ≥ − 30

Interval Notation:

[ − 30 , ∞ )

4 0
3 years ago
Lainey bought a set of 20 markers for $6 dollar sign, 6. What is the cost of 1 marker?
marin [14]
Hello!

To find the price of one marker you divide the price paid by the amount of markers bought

6 / 20 = 0.30

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The answer is $0.30

Hope this helps!
5 0
2 years ago
Read 2 more answers
Select True or False to correctly classify each inequality.
Ksivusya [100]
<h2><u><em>Answer:</em></u></h2>

<u><em>1. FALSE</em></u>

<u><em>2. TRUE</em></u>

<u><em>3. FALSE</em></u>

<u><em>4. TRUE</em></u>

<h2>Step-by-step explanation:</h2>

<em>6≤-6 = False</em>

<em>-3<3 = True</em>

<em>2.9>2.9 = False</em>

<em>4.5≥4.5 = True</em>

<em>I Hope That This Helps You GOOD LUCK</em>

3 0
2 years ago
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