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GREYUIT [131]
3 years ago
13

Determine how many solutions each equation has without using inverse operations. Explain your reasoning for each.

Mathematics
1 answer:
GuDViN [60]3 years ago
7 0

Answer:

  an infinite number

Step-by-step explanation:

The left side of the equation is a restatement of the right side of the equation. It is true for all values of x. There are an infinite number of solutions.

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A hair salon in Cambridge, Massachusetts, reports that on seven randomly selected weekdays, the number of customers who visited
morpeh [17]

Answer:

a: 28 < µ < 34

Step-by-step explanation:

We need the mean, var, and standard deviation for the data set.  See first attached photo for calculations for these...

We get a mean of 222/7 = 31.7143

and a sample standard deviation of: 4.3079

We can now construct our confidence interval.  See the second attached photo for the construction steps.

They want a 90% confidence interval.  Our sample size is 7, so since n < 30, we will use a t-score.  Look up the value under the 10% area in 2 tails column, and degree of freedom is 6 (degree of freedom is always 1 less than sample size for confidence intervals when n < 30)

The t-value is: 1.943

We rounded down to the nearest person in the interval because we don't want to over estimate.  It said 28.55, so more than 28 but not quite 29, so if we use 29 as the lower limit, we could over estimate.  It's better to use 28 and underestimate a little when considering customer flow.

5 0
3 years ago
Bryan drives at an average speed of 60 miles per hour.
riadik2000 [5.3K]

Answer:

180

Step-by-step explanation:

Multiply 60x3

and you will get 180miles

3 0
3 years ago
Read 2 more answers
Which of the following expressions can be used to calculate the slope of a line passing through (x1,y1) and (x2,y2)?
Ganezh [65]

Answer:

Option d.

y2-y1/X2-X1

Step-by-step explanation:

I hope it helped U

stay safe stay happy

6 0
3 years ago
Lee has $220 to spend on shirts at $22 each and pants $38 each. what inequality represents the possible number of shirts and pan
Viefleur [7K]

The inequality that models the given situation is:

y*$22 + x*$38 ≤ $220

And some solutions are (1, 1), (1, 2), (2, 2).

<h3>Which inequality models the given situation?</h3>

To find the inequality, we first need to define the variables that we will use, the variables are:

  • x = number of pants bought.
  • y = number of shirts bought.

Knowing the price of each individual item, the total cost will be given by:

C = y*$22 + x*$38

And Lee has $220 to spend, so the maximum amount that he can spend is $220, then we have the inequality:

y*$22 + x*$38 ≤ $220

Now, to find solutions you just need to find some values of x and y that make the inequality true, for example, one solution is x = 1 and y = 1.

1*$22 + 1*$38 ≤ $220

$60 ≤ $220

This is true, so (1, 1) is a solution.

Another solutions are (2, 2), (1, 2), (0, 3), etc.

If you want to learn more about inequalities you can read:

brainly.com/question/24372553

#SPJ1

6 0
1 year ago
Triangle ABC is a right triangle. The length of one leg is 30 cm and the hypotenuse is 78 cm. What is the length of the other le
Liono4ka [1.6K]

Answer:

72

Step-by-step explanation:

there is 180 degrees in a triangle

4 0
2 years ago
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