Answer: C
<u>Step-by-step explanation:</u>
5(z - 4) - z = 4z - 20
<u>5z</u> - 20 <u>- z</u> = 4z - 20
4z - 20 = 4z - 20
<u>-4z </u> <u>-4z </u>
-20 = -20
TRUE
Since it is a true statement, there are infinitely many solutions
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Answer: D
<u>Step-by-step explanation:</u>
Eric: 1 hot dog
Mark: 1 hot dog + 1 soda + 1 peanuts
Total: 2 hot dogs + 1 soda + 1 peanuts
= 2(3.50) + x + 1(4.00)
= 7.00 + x + 4.00
= x + 11.00
Eric paid 3.00: x + 11.00 - 3.00
x + 8.00
Mark paid 11.50 which was the balance owed: 11.50 = x + 8.00
11.50 = x + 8.00
<u>-8.00</u> <u> -8.00 </u>
3.50 = x
the soda cost $3.50
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1. <span>Tribal culture hunts buffalo on grasslands
2. </span><span>Mechanized culture uses plows to turn grasslands into farms
3. </span><span>Climate changes so farms die
4. </span>Group migrates away from area
Answer: 16,000,000
Step-by-step explanation:
The solution to the system of equation are x = -2 and y = 3
<h3>How to find the solution of a system of equation?</h3>
x + 3y = 7
2x + 4y = 8
Let's isolate x in the first equation
x = 7 - 3y
substitute the value of x in the second equation.
Therefore,
2(7 - 3y) + 4y = 8
14 - 6y + 4y = 8
-2y = 8 - 14
-2y = -6
y = -6 / -2
y = 3
Hence,
x + 3(3) = 7
x = 7 - 9
x = -2
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