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3 years ago

14

Solve with algebra:

x} = 12" alt="2^x - 2^{-x} = 12" align="absmiddle" class="latex-formula">

1 answer:

ValentinkaMS [17]3 years ago

6 0

Answer: No solution.

Step-by-step explanation: There are no values of x that make the equation true.

Hope this helps you out.

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Evaluate the following expression when x = 4 and y = 5:

marissa [1.9K]

It would be 23.5 idk if your aloud to do that
or 141/6

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3 years ago

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Write 7/14 • (-7/12) in lowest terms

Marizza181 [45]

The final answer should be -49/168.

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3 years ago

Christopher estimates it will take him half an hour to complete his math homework. He is able to complete it in 25 minutes. What

marin [14]

Answer:

The percent error in his estimate is<u> 16.67%</u>.

Step-by-step explanation:

Given:

Christopher estimates it will take him half an hour to complete his math homework.

He is able to complete it in 25 minutes.

Now, to find the percent error in his estimate.

Time estimates of completing homework = 30 minutes.

Time actual taken to complete homework = 25 minutes.

Error in estimate = Time estimates of completing homework - Time actual taken to complete homework.

Error in estimate = 30 minutes - 25 minutes.

Error in estimate = 5 minutes.

Now, to get the percent error:

$Percent\ error =\frac{Error\ in\ estimate}{Time\ estimates\ of\ completing\ homework} \times 100.$

$Percent\ error=\frac{5}{30} \times 100$

$Percent\ error=\frac{500}{30}$

$Percent\ error=16.67\%.$

Therefore, the percent error in his estimate is 16.67%.

6 0

3 years ago

The seniors on the student council bought a total of 36 plants to use in landscaping the front of the school. They bought some a

Artyom0805 [142]

Answer: B

Step-by-step explanation:

y = azaleas

x = lilies

6y + 5x =196 total cost

y + x = 36 total number of items

y = 36 – x

6(36 -x ) +5x =196

216 – 6x + 5x = 196

-x = 196 – 216

-x = -20

Divide by -1

X = 20 lilies

Plug into y equation

Y = 36 – 20

Y= 16 azaleas

To check

6(16) + 5(20) = 196

96 + 100 = 196

3 0

3 years ago

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Complete the following.(a) Find the greatest common factor (GCF) of 63 and 36.хGCF = 0(b) Use the GCF to factor 63 -36.63 – 36 =

morpeh [17]

Answer:

a) The GCF of 63 and 36 is 9

b)

$63-36=9\times(7-4)$

Explanation:

a) To find the GCF of 63 and 36, we do the following:

Write 63 and 36 as follows:

$\begin{gathered} 63=3\times3\times7 \\ 36=2\times2\times3\times3 \end{gathered}$

The common factors are:

$3\times3$

Therefore, the Greatest Common Factor (GCF) is 9

b) To find the factor 63 - 36

$63-36=9\times(7-4)$

6 0

1 year ago