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Natalka [10]
3 years ago
11

Which function shows a fabric with a price of $1.25 per square yard?

Mathematics
2 answers:
sladkih [1.3K]3 years ago
5 0

Answer:

x(1.25)

Step-by-step explanation:

x is the yards.

so for example if you need 2 yards of fabric replace x with 2.

amid [387]3 years ago
3 0

Answer:

x=1.25

Step-by-step explanation:

edgu

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Lazurus Steel Corporation produces iron rods that are supposed to be 36 inches long. The machine that makes these rods does not
Igoryamba

Answer:

Step-by-step explanation:

We would construct a confidence interval.

Confidence interval is written in the form,

(Sample mean - margin of error, sample mean + margin of error)

The sample mean, x is the point estimate for the population mean.

Since the sample size is large and the population standard deviation is known, we would use the following formula and determine the z score from the normal distribution table.

Margin of error = z × σ/√n

Where

σ = population standard Deviation

n = number of samples

From the information given

x = 36.02 inches

σ = 0.1 inches

n = 40

To determine the z score, we subtract the confidence level from 100% to get α

α = 1 - 0.99 = 0.01

α/2 = 0.01/2 = 0.005

This is the area in each tail. Since we want the area in the middle, it becomes

1 - 0.005 = 0.995

The z score corresponding to the area on the z table is 2.58. Thus, confidence level of 99% is 2.58

Margin of error = 2.58 × 0.1/√40 = 0.041

Confidence interval = 36.02 ± 0.041

The lower end of the confidence interval is

36.02 - 0.041 = 35.979 inches

The upper end of the confidence interval is

36.02 - 0.041 = 36.061 inches

Since 36.061 > 36.05, then we would conclude that the machine needs an adjustment.

The formula used is

Confidence interval =

Sample mean ± z × σ/√n

7 0
3 years ago
Use the quadratic formula to determine the exact solutions to the equation.
lawyer [7]

Answer:

x= 2.28

or, x= 0.219

Step-by-step explanation:

2x²-5x+1 =0

a= 2, b= -5 and c= 1

x= (-b <u>+</u> √(b²-4ac))/2a

= (5 <u>+</u> √(25-8))/4

= (5 <u>+</u> √17)/4

8 0
3 years ago
What is the value of the expression 2[4(2^3+5)]-4^2
ivolga24 [154]

Answer:

88

Step-by-step explanation:

Solve inside first

2^3=8

8+5= 13

Now multiply by 4

=52

Now by 2

=104

Now this is what we have left

=104-4^2

Make it easy by solving 4^2 which is 16.

104-16

=88

3 0
3 years ago
Which of the following describes the graph of 2x + 4y &lt; 16?
SSSSS [86.1K]

Answer:

dashes line shaded below

Step-by-step explanation:

hope this helps

4 0
2 years ago
Read 2 more answers
Evaluate tan 11 pi/6
Nadusha1986 [10]

Answer:

tan 11 pi dived by 6 is equal to -118.307586549

4 0
2 years ago
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