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3 years ago

If 1/4x=5-1/2 y what is the value of 8x-1

Mathematics

1 answer:

Alex73 [517]3 years ago

3 0

Answer:

8x - 1 = 159 - 16y

Step-by-step explanation:

1/4x=5-1/2 y what is the value of 8x-1

Beginning from the given equation, we will find the required

Which mean, we will transform the left hand side (1/4 x) to (8x-1)

$\frac{1}{4} x=5-\frac{1}{2} y$ multiply both sides by 4

∴ x = 20 - 2y

multiply both sides by 8

∴ 8x = 8 * ( 20 - 2y)

∴ 8x = 160 - 16y

Subtract 1 from both sides

8x - 1 = 160 - 16y - 1

∴ 8x - 1 = 159 - 16y

So, the value of 8x - 1 = 159 - 16y

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5(3+t)-3(t+1) I don't understand how to do this problem.

shtirl [24]

Okay, just break it up so you're not overwhelming yourself or anything :)
So here, do it in steps-

Let's do 5(3 + t) first:
Distribute the 5, or in non-mathematical terms, just multiply 5 by 3 and t. This will give you 15 + 5t.

Now onto -3(t + 1):
Again, just multiply -3 by t and 1. This will come out to: -3t - 3.

*Note: the 3 is negative because it's "MINUS 3" in the original equation and remember that any number times a negative, if it isn't negative itself, will turn out to be negative.... (aka "-" x "-" = "+" | "+" x "+" = "+" | "-" x "+" = "-")*

ANYWAY
Now just put both answer together and you get:
15 + 5t -3t - 3. You can only add and minus the LIKETERMS (which are the things that are the same) - in this case, the liketerms are 15 and -3 ,,,, AND 5t and -3t.

15 - 3 = 12
5t - 3t = 2t

12 + 2t is your final answer. Hope that helps! :)

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2 years ago

HELP: Of 580 students in a high school graduating class 45% are planning to go to college. How many of the graduates are plannin

Rina8888 [55]

Answer:

261 of the graduates are planning to go to college.

Step-by-step explanation:

This is a proportion question.

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___ = ___

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1 year ago

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Dahasolnce [82]

8x-77 would be the answer to this

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2 years ago

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DanielleElmas [232]

Answer:

If the stand-alone method would be used the startup would pay $60,000.00.

Step-by-step explanation:

The current cost for Spring Harbor Corporation is $180,000.00, but they use only 70% of the corporate suite.

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3 years ago

4(2x + 1) = 2(x - 13)

MakcuM [25]

The answer would be -5.

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3 years ago