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xxMikexx [17]
3 years ago
9

Is u = - 1/2 a solution of 8u - 1 = 6u

Mathematics
2 answers:
saul85 [17]3 years ago
6 0

Answer: No.

Step-by-step explanation: Sub -1/2 in for u in the equation:

8(-1/2) - 1 =6(-1/2)

=-4-1 = -3

=

-5=-3 which is false, so it is not a solution

kakasveta [241]3 years ago
5 0

Answer:

No

Step-by-step explanation:

Plugging in -1/2 for u:

8(-1/2) - 1 = 6(-1/2)

-4 - 1 = -3

-5 = -3 ... these are not equal

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7 0
3 years ago
What is the answer to this 4 1/3 x 6 please help
netineya [11]
Hope this helps...
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6 0
3 years ago
-1 3/8 ÷ ( -1 4/7) =
vazorg [7]

Answer:

121/56 or 2.160714

Step-by-step explanation:

invert the second fraction and multiply the fractions then simplify

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3 0
3 years ago
The population of a city of 826,000 people decreases 3% per year.
Lubov Fominskaja [6]

Answer:

588200

Step-by-step explanation:

3% of 826,000 is 24780, 24780 x 10 years is 247800

826,000-247800= 588200

5 0
3 years ago
If 2x + 5 = 8x, then 12x = ?A.5B.10C.15D.20
butalik [34]
<h2>Answer:</h2>10.\text{ Option B is correct}

<h2>Explanation:</h2>

Given the equation expressed as:

2x+5=8x

First, we need to calculate the value of "x" from the given expression.

Step 1: Given the equation 2x + 5 = 8x

Step 2: Subtract 5 from both sides:

\begin{gathered} 2x+5-5=8x-5 \\ 2x+\cancel{5}-\cancel{5}=8x-5 \\ 2x=8x-5 \end{gathered}

Step 3: Subtract 8x from both sides

\begin{gathered} 2x-8x=8x-8x-5 \\ -6x=\cancel{8x}-\cancel{8x}-5 \\ -6x=-5 \end{gathered}

Step 4: Divide both sides by -6

\begin{gathered} \frac{-6x}{-6}=\frac{-5}{-6} \\ x=\frac{5}{6} \end{gathered}

Step 5: Get the value of 12x. Substitute x = 5/6 into the expression to have:

\begin{gathered} 12x=12(\frac{5}{6}) \\ 12x=\cancel{12}^2(\frac{5}{\cancel{6}^1}) \\ 12x=2\times5 \\ 12x=10 \end{gathered}

Therefore the value of 12x is 10

3 0
1 year ago
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