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3 years ago

Solve for x (please show work if possible)

Mathematics

1 answer:

mariarad [96]3 years ago

5 0

X = 5

Solving steps:

1. 2x - 45 = - 35

2. 2x = - 35 + 45

3. 2x = 10

4. x = 5

Hope that helps

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6) Evaluate 3/4x if X = -1/4

marysya [2.9K]

Answer: $-\frac{3}{16}$

Step-by-step explanation:

$\frac{3}{4}(-\frac{1}{4} )$

multiply the numberator and denominator:

3*-1 = -3

and

4*4 = 16 so,

$-\frac{3}{16}$ is the answer

7 0

2 years ago

Read 2 more answers

Find a 75% confidence interval for the population average weight μ of all adult mountain lions in the specified region. (Round y

kupik [55]

Answer:

75% confidence interval is 91.8±16.66. That is between 75.1 and 108.5 pounds.

Step-by-step explanation:

The question is missing. It is as follows:

Adult wild mountain lions (18 months or older) captured and released for the first time in the San Andres Mountains had the following weights (pounds): 69 104 125 129 60 64

Assume that the population of x values has an approximately normal distribution.

Find a 75% confidence interval for the population average weight μ of all adult mountain lions in the specified region. (Round your answers to one decimal place.)

75% Confidence Interval can be calculated using M±ME where

M is the sample mean weight of the wild mountain lions ( $\frac{69 +104 +125 +129+60 +64}{6} =91.8$ )

ME is the margin of error of the mean

And margin of error (ME) of the mean can be calculated using the formula

ME= $\frac{t*s}{\sqrt{N} }$ where

t is the corresponding statistic in the 75% confidence level and 5 degrees of freedom (1.30)

s is the standard deviation of the sample(31.4)

N is the sample size (6)

Thus, ME= $\frac{1.30*31.4}{\sqrt{6} }$ ≈16.66

Then 75% confidence interval is 91.8±16.66. That is between 75.1 and 108.5

3 0

3 years ago

Through what angle does the minute hand of a clock turn in 12 minutes of time? A. 72° B. 120° C. 12° D. 36°

lesantik [10]

The minute hand makes full angle of 360° in 1 hour = 60 minutes.

12 minutes form $\dfrac{12}{60}=\dfrac{1}{5}$ of an hour.

Then the minute hand makes $\dfrac{1}{5}$ of full angle in 12 minutes. $\dfrac{1}{5}$ of 360° is

$\dfrac{360^{\circ}}{5}=72^{\circ}.$

Answer: option A.

6 0

4 years ago

Read 2 more answers

5) One band rented a van to travel to Omaha. The band started out at 9:00AM, took a break at 9:32AM, and finally arrived in Omah

Fittoniya [83]

Answer:

1 hour and 4 minutes

Step-by-step explanation:

6 0

1 year ago

Plzzzz helppp im stupid!!!

STatiana [176]

Answer:

1. A'B'C'

(2, 4) (4, 10) (14, 2)

A''B''C'' (2, 8) (8, 14) (14, 6)

2. D'E'F'G

(-6, 3) (-9, 3) (-6, 12) (-9, 12)

D''E''F''G'' (-2, 1) (-3, 1) (-2, 4) (-3, 4)

Step-by-step explanation:

Ok. So, when you are dialating, you first step is to determine wether it is bigger or smaller. If the scale factor is more than one, it is an enlargment or getting bigger. If it is less than 1, it is a reduction and getting smaller. Then, it is just math. Lets say that the point is (2, 4) and your scale factor is 2. Multiply 2 times 2 to get 4. Then multiply 4 times 2 to get 8. Your new cordinante is (4, 8).

You are not stupid you can do it!

5 0

3 years ago