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Vika [28.1K]
3 years ago
7

Does anybody know...

Mathematics
1 answer:
GalinKa [24]3 years ago
4 0

Answer:75.36 inches

Step-by-step explanation:

radius=12In

π=3.14

circumference=2 x π x radius

Circumference=2 x 3.14 x 12

Circumference=75.36

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Kevin and Conner are selling subs and sandwiches for a fundraiser. Kevin sold 25 subs and 18 sandwiches for a total of $209.50.
AleksandrR [38]

Answer:

1 sub = $5.50; 1 sandwich = $4.00

Step-by-step explanation:

You can solve this using a matrix and solving using reduced row-echelon form.

5 0
3 years ago
Read 2 more answers
What is the equation of this trend line?<br> RE<br> Enter your answers b y filling in the boxes.
Deffense [45]

Answer:

K=-2J+28

Step-by-step explanation:

step 1

Find the slope of the line

The formula to calculate the slope between two points is equal to

m=\frac{k2-k1}{j2-j1}

we have the points

(2,24) and (6,16)

substitute in the formula

m=\frac{16-24}{6-2}

m=\frac{-8}{4}

m-2

step 2

Find the equation of the line in slope intercept form

K=mJ+b

we have

m=-2

b=28 ----> the k-intercept is the point (0,28)  see the graph

substitute

K=-2J+28

7 0
3 years ago
A random sample of 100 workers in one large plant took an average of 12 minutes to complete a task, with a standard deviation of
SCORPION-xisa [38]

Answer:

The 95% Confidence Interval for the difference between the two population mean completion times =

(0.081, 1.919)

Step-by-step explanation:

Confidence Interval for difference between two means =

μ1 -μ2 ± z × √ σ²1/n1 + σ²2/n2

Where

μ1 = mean 1 = 12 mins

σ1 = Standard deviation 1 = 2 mins

n1 = 100

μ2= mean 2 = 11 mins

σ2 = Standard deviation 2 = 3 mins

n1 = 50

z score for 95% confidence interval = 1.96

μ1 -μ2 ± z × √ σ²1/n1 + σ²2/n2

= 12 - 11 ± 1.96 × √2²/100 + 3²/50

= 1 ± 1.96 × √4/100 + 9/50

= 1 ± 1.96 × √0.04 + 0.18

= 1 ± 1.96 × √0.22

= 1 ± 1.96 × 0.469041576

= 1 ± 0.9193214889

Confidence Interval

= 1 - 0.9193214889

= 0.0806785111

≈ 0.081

1 + 0.9193214889

= 1.9193214889

≈ 1.919

Therefore, the 95% Confidence Interval for the difference between the two population mean completion times =

(0.081, 1.919)

5 0
3 years ago
For the linear equation 5x - y = 2, which of the following has a value of 5?
Step2247 [10]

The slope-intercept form of a line is the following:

y=mx+q

In this form, m is the shape and q is the y-intercept. Your line written in this form is

y=5x-2

which implies that the slope is 5 and the y-intercept is -2.

8 0
3 years ago
Pls help fast!!! giving 20 points!!!
tester [92]
It’s y=2x-6 for sure
5 0
3 years ago
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