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babunello [35]
3 years ago
10

Solve for x 2(x - 2) + 3 = 2x - 1

Mathematics
1 answer:
Luda [366]3 years ago
5 0

9514 1404 393

Answer:

  x can be any value (infinite number of solutions)

Step-by-step explanation:

The equation simplifies to ...

  2(x -2) +3 = 2x -1

  2x -4 +3 = 2x -1

  2x -1 = 2x -1

This is true for every value of x. There are an infinite number of solutions.

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A loaf of bread costs $0.90. Each loaf has 15 slices. How much does each slice of bread cost?
scoray [572]

Answer:

Each slice of bread costs $0.06.

Step-by-step explanation:

To find how much each slice of bread costs, you need to divide the cost (0.90) by how many slices there are (15). When you divide the two, you get 0.06. To check your answer you can do 0.06x15 and that will equal $0.90.

8 0
3 years ago
Read 2 more answers
A fast food restaurant executive wishes to know how many fast food meals teenagers eat each week. They want to construct a 99% c
Lana71 [14]

Answer:

The minimum sample size required to create the specified confidence interval is 2229.

Step-by-step explanation:

We have that to find our \alpha level, that is the subtraction of 1 by the confidence interval divided by 2. So:

\alpha = \frac{1-0.99}{2} = 0.005

Now, we have to find z in the Ztable as such z has a pvalue of 1-\alpha.

So it is z with a pvalue of 1-0.005 = 0.995, so z = 2.575

Now, find the margin of error M as such

M = z*\frac{\sigma}{\sqrt{n}}

In which \sigma is the standard deviation of the population and n is the size of the sample.

What is the minimum sample size required to create the specified confidence interval

This is n when M = 0.06, \sigma = 1.1

0.06 = 2.575*\frac{1.1}{\sqrt{n}}

0.06\sqrt{n} = 2.575*1.1

\sqrt{n} = \frac{2.575*1.1}{0.06}

(\sqrt{n})^{2} = (\frac{2.575*1.1}{0.06})^{2}

n = 2228.6

Rounding up

The minimum sample size required to create the specified confidence interval is 2229.

7 0
3 years ago
Please help please just give meh an example
Brrunno [24]

Answer: A compound event is an event that has more than one possible outcomes.

Example: Outcome of rolling a 6 since the dice is 6 sided. 1/6 is the probability .

5 0
3 years ago
Find the x- and y-intercepts of the graph of the linear equation −x+8y=4
Andreyy89
First set the equation equal to y by adding x to each side, then divide everything by 8. then set x to zero and solve to find the y - intercept of 1/2 which is just 4/8 reduced. you get this answer because x/8 becoming 0/8 is just 0 leaving you with only 1/2. then reset the equation with x and set y to zero and solve for x to get the x- intercept of -4. you get this by subtracting 1/2 from both sides leaving you -1/2=x/8 and multiply by 8 to get -4=x

4 0
3 years ago
8y + 7 = 6y - 3<br> Help solve
Alenkasestr [34]

Answer:

-5

Step-by-step explanation:

8y-6y=-3-7

2y=-10

y=-10÷2

y=-5

6 0
3 years ago
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