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White raven [17]
2 years ago
9

Which statement best describes what happened when h is changed from 4 to - 2.

Mathematics
1 answer:
Leokris [45]2 years ago
4 0
Where are the statements
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How many commuters must be randomly selected to estimate the mean driving time of Chicago commuters? We want 95% confidence that
lukranit [14]

Answer: 25 computers will be selected

Step-by-step explanation:

Where: Z -value at 95% confidence = 1.96; SD = Standard deviation = 10 minutes; N = Sample size; Margin error = 4 minutesSubstituting;4 = 1.96*10/Sqrt (N)Sqrt (N) = (1.96*10)/4 = 4.9N = 4.9^2 = 24.01 ≈ 25

5 0
3 years ago
3. Which graph best represents the solution to the following system? (1 point)<br> (5x – 2y &lt;10
Step2247 [10]

Answer:

The graph in the attached figure

Step-by-step explanation:

The complete question is

Which graph best represents the solution to the following system?

5x - 2y < (less than or equal to) 10

x + y < 5

we have

5x-2y\leq 10 ----> inequality A

isolate the variable y

Adds 2y both sides

5x \leq 10+2y

Subtract 10 both sides

5x-10 \leq 2y

Divide by 2 both sides

2.5x-5 \leq y

Rewrite

y \geq 2.5x-5

The solution of the inequality A is the shaded area above the solid line

The equation of the solid line is y=2.5x-5

The slope of the solid line is positive m=2.5

The y-intercept of the solid line is (0,-5)

The x-intercept of the solid line is (2,0)

x+y < 5 -----> inequality B

Isolate the variable y

Subtract x both sides

y < -x+5

The solution of the inequality B is the shaded area below the dashed line

The equation of the dashed line is y=-x+5

The slope of the dashed line is negative m=-1

The y-intercept of the dashed line is (0,5)

The x-intercept of the dashed line is (5,0)

using a graphing tool

The solution of the system of inequalities is the shaded area between the solid line and the dashed line

see the attached figure

7 0
3 years ago
Solve the system of equations: y=x^2+3x-6 y=2x-6
alexira [117]
<h3>Hey .... </h3>

here's your answer in the given attachment

5 0
3 years ago
Read 2 more answers
What are equal intervals?
Lena [83]
It's along the number line 
3 0
3 years ago
Read 2 more answers
How do you solve this? <br>Y x 49/36=7/12
Triss [41]
Divide both sides by 49/36 to get y by itself:

\frac{7}{12} \div \frac{49}{36}

\frac{7}{12} \times \frac{36}{49} = \frac{254}{588}

Simplify this fraction:

\frac{254}{588} \div \frac{2}{2} = \frac{127}{294}

Now you have your answer:

y = \frac{127}{294}


5 0
3 years ago
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