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erik [133]
3 years ago
11

If 2x+z=2y and 2x+2y+z=20 what is the value of y?

Mathematics
1 answer:
mixer [17]3 years ago
3 0
2x+z=2y\to2x=2y-z\\\\substitute\ to\ 2x+2y+z=20:\\\\(2y-z)+2y+z=20\\2y-z+2y+z=20\\4y=20\ \ \ \ /:4\\y=5\to answer
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Show me how to do this on paper i need it right now
postnew [5]

Answer:

Step-by-step explanation:

32 x 10 = 320

32 x 4 = 128

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3 0
3 years ago
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A tennis ball travels at speed of 120 miles per hour.convert this rate to feet per second
Vanyuwa [196]
120\frac{mile}{hour}\\\\
1 \ mile=5280\ feet\\
1\ hour=3600\ seconds\\\\
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\boxed{120\frac{mile}{hour}=176\frac{feet}{second}}
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3 years ago
What is the value of x ? 6.75 + 3/8x = 13 1/4
Bad White [126]

Let's solve your equation step-by-step.

6.75+38x=1314

Step 1: Simplify both sides of the equation.

38x+6.75=534

Step 2: Subtract 6.75 from both sides.

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Step 3: Multiply both sides by 8/3.

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x=1713

7 0
3 years ago
Desperately need help and an explanation so I can do it on my own later.
Mashutka [201]

Step-by-step explanation:

since the sumation of f(x) of a probability is 1

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4 0
2 years ago
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Damm [24]

Answer:

63.6 feet

Step-by-step explanation:

5.3×12=63.6 feet

4 0
3 years ago
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