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Crazy boy [7]
3 years ago
11

Solve the given inequality and graph the solution on a number line -x/2 + 3/2 < 5/2

Mathematics
1 answer:
Daniel [21]3 years ago
3 0
The correct answer is x>-2.  The graph is attached.

To solve this:

-x/2 + 3/2 < 5/2

Subtract 3/2 from both sides:
-x/2 + 3/2 - 3/2 < 5/2 - 3/2
-x/2 < 2/2
-x/2 < 1

Multiply both sides by 2:
(-x/2)*2 < 1*2
-x < 2

Divide both sides by -1:
-x/-1 < 2/-1

Remember to flip the the symbol since you divide both sides by a negative:
x > -2

To graph the inequality, we draw a number line, making sure we have -2 on it.  We circle -2 and leave it open, since it is strictly greater than.  Then we shade the line to the left.

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The value of x varies directly with the value of y, and when x=20, y=18. What is the value of “k”, the constant of proportionali
stealth61 [152]

Answer:

In this case, y=30 and x=6, so 30=k*5<=> k=30/6=5.

Step-by-step explanation:

The constant of proportionality is the ratio between two directly proportional quantities. Two quantities are directly proportional when they increase and decrease at the same rate. The constant of proportionality k is given by k=y/x where y and x are two quantities that are directly proportional to each other.

8 0
3 years ago
Need help! Show work
Sergeu [11.5K]
The first step for each of these is adding or subtracting the coefficient to isolate your terms with variables. And then divide to isolate the variable itself.
8 0
3 years ago
8x+11=14-1x how does it work
Alenkinab [10]

Answer:

x = 1/3

Step-by-step explanation:

Step 1: Write equation

8x + 11 = 14 - 1x

Step 2: Solve for <em>x</em>

  1. Simplify: 8x + 11 = 14 - x
  2. Add x to both sides: 9x + 11 = 14
  3. Subtract 11 on both sides: 9x = 3
  4. Divide both sides by 9: x = 3/9
  5. Simplify: x = 1/3

Step 3: Check

<em>Plug in x to verify it's a solution.</em>

8(1/3) + 11 = 14 - 1(1/3)

8/3 + 11 = 14 - 1/3

41/3 = 41/3

3 0
3 years ago
Read 2 more answers
Use the given information to construct a 99% confidence interval estimate of the mean of the population. n = 39, σ = 3.86, Xbar
horsena [70]

Answer:

40.1 < μ < 43.3

Step-by-step explanation:

Margin of error = critical value × standard error

ME = CV × SE

At 99% confidence and 38 degrees of freedom, CV = 2.712.

SE = s / √n

SE = 3.86 / √39

SE = 0.618

So the margin of error is:

ME = 2.712 × 0.618

ME = 1.7

So the 99% confidence interval of the population mean is:

μ = 41.7 ± 1.7

40.0 < μ < 43.4

Closest answer is the first one.

4 0
3 years ago
I need help ASAP pleaseeeeeeee
pav-90 [236]

Answer:

1 / 5^11

Step-by-step explanation:

5^ -6  * 5 ^ -5

We know that a^ b * a^ c = a^( b+c)

5^ ( -5+-5)

5^ -11

We also know that

a^-b = 1/ a^b

1 / 5^11

8 0
3 years ago
Read 2 more answers
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