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3 years ago

I need help asap pls!!

Mathematics

1 answer:

liubo4ka [24]3 years ago

6 0

Answer:

x = 11°

Step-by-step explanation:

x = 11° because it is an alternate interior angle to 11°

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Trisha needs 4.5 yards of fabric to do a project. If she already has 2/3 of a yard of fabric, what is the minimum amount of fabr

DochEvi [55]

1 yard = 3 feet
2/3 of a yard would be 2 feet

4.5 yards = 13.5 feet
13.5-2 = 11.5 feet

11.5 feet = 3.83 yards

therefore at least 11.5 feet or 3.83 yards must be purchased

8 0

3 years ago

Assume the resting heart rates for a sample of individuals are normally distributed with a mean of 75 and a standard deviation o

Shalnov [3]

Answer:

a) 0.975

b) 0.16

c) 0.475

Step-by-step explanation:

The Empirical Rule states that, for a normally distributed random variable:

68% of the measures are within 1 standard deviation of the mean.

95% of the measures are within 2 standard deviation of the mean.

99.7% of the measures are within 3 standard deviations of the mean.

In this problem, we have that:

Mean = 75

Standard deviation = 5

We also have that since the normal distribution is symmetric, 50% of the measures are below the mean and 50% are above.

a. The relative frequency of rates less than 85 using the 68-95-99.7 rule is

85 is two standard deviations above the mean.

So all the 50% below the mean is below 85

And of the 50% above the mean, 95% is less than 85. So

0.5 + 0.95*0.5 = 0.975

b. The relative frequency of rates greater than 80 using the 68-95-99.7 rule is

80 is one standard deviations above the mean.

Of the 50% above the mean, 68% is less than 80. So 100-68 = 32% is more than 80.

0.32*0.5 = 0.16.

c. The relative frequency of rates between 65 and 75 using the 68-95-99.7 rule is

Within the mean and two standard deviations below the mean.

So 95% of 50%

0.95*0.5 = 0.475

6 0

4 years ago

Please help ASAP!!!!!

padilas [110]

Answer:

18ft^2

Step-by-step explanation:

I'm going to use a dilation method to help solve this.

First we need to find your base. So 12/4 = 3.

6*3 = 18.

18 ft^2

7 0

4 years ago

16.Speedy Rentals charges $300 per month to rent a car plus an initial deposit of $500. Thrifty Rentals charges $200 per month t

pentagon [3]

Answer:

A: Speedy Rentals is $100 cheaper if you only rent a car for 4 months

B: If you rented a car for 5 months then both places woulb be the same amount

Step-by-step explanation:

8 0

3 years ago

Answer the following questions using the data given below.Phone Hold Time for Concert Tickets in Seconds (n = 5)Operators (X) Wa

likoan [24]

Answer:

H₀:β=0

H₁:β≠0

p-value: 0.2935

95% CI: [-45.91;19.71]

Step-by-step explanation:

Hello!

You need to make a linear regression test. For this, you have two variables

X: Operators

Y: Wait time

x: 4 ; 5; 6; 7 ; 8

y: 385 ; 335 ; 383 ; 344 ; 288

The linear regression equation:

Yi: α + βxi + εi

a. The Hypothesis for a two-tailed test for the slope is:

H₀:β=0

H₁:β≠0

The statistic is

t= (b-β)/√Sb₂ ~ $t_{n-2}$

I've used a statistic software to calculate the values

b= 10.31

$t_{H0}$ = -1.27

p-value= 0.2935

The 95% CI for the slope, using the formula:

b± $t_{n-2}$ *Sb

is,

[-45.91;19.71]

I hope you have a SUPER day!

7 0

4 years ago