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2 years ago

PLEASE HELP!!! WHOEVER GETS THE ANSWER RIGHT GETS BRAINLIEST!!!

Mathematics

2 answers:

masha68 [24]2 years ago

7 0

There is 4 X so you use 360- (11+1) which is 348 and now divide by 4 which is now 87

<h2>Thank you for asking</h2><h2 /><h2>From Cambridge</h2><h2 />

prisoha [69]2 years ago

7 0

Answer:

Step-by-step explanation:

3x+1+x+11 = 180

4x+12 = 180

4x= 180-12

4x=168

x = 168/4

x = 42

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What is the relationship between 5.34×1055.34×105 and 5.34×10−25.34×10−2 ?

storchak [24]

5+2=7 which means there will be 7 zeros so it is 10000000 times greater than

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3 years ago

Read 2 more answers

A researcher is going to estimate the average typing speed of students of a college. He selects a random sample of 20 students a

Stella [2.4K]

Answer:

The margin of error of the 90% confidence interval of a student's average typing speed is of 1.933 wpm.

Step-by-step explanation:

We have the standard deviation for the sample, which means that the t-distribution is used to solve this question.

The first step to solve this problem is finding how many degrees of freedom, we have. This is the sample size subtracted by 1. So

df = 20 - 1 = 19

90% confidence interval

Now, we have to find a value of T, which is found looking at the t table, with 19 degrees of freedom(y-axis) and a confidence level of $1 - \frac{1 - 0.9}{2} = 0.95$ . So we have T = 1.7291

The margin of error is:

$M = T\frac{s}{\sqrt{n}}$

In which s is the standard deviation of the sample and n is the size of the sample. For this question, we have $s = 5, n = 20$ . So

$M = T\frac{s}{\sqrt{n}}$

$M = 1.7291\frac{5}{\sqrt{20}}$

$M = 1.933$

The margin of error of the 90% confidence interval of a student's average typing speed is of 1.933 wpm.

8 0

3 years ago

A grid shows the positions of a subway stop and your house. The subway stop is located at (-1, 0) and your house is located at (

mars1129 [50]

4.47 to the nearest unit would be 4

5 0

3 years ago

What is the value of the expression below? <br><br> 675 ÷ 3 - (15 - 12)² <br><br> PLZ HELP-

vodomira [7]

Answer:

675 ÷ 3 - ( 225 - 144)

675 ÷ 3 - (81)

225 - 81

144

I hope it's helps you

5 0

2 years ago

Please help!!!! ASAP I’ll mark you as brainliest

KatRina [158]

Answer:

Vel_jet_r = (464.645 mph) North + (35.35 mph) East

||Vel_jet_r|| = 465.993 mph

Step-by-step explanation:

We need to decompose the velocity of the wind into a component that can be added (or subtracted from the velocity of the jet)

The velocity of the jet

500 mph North

Velocity of the wind

50 mph SouthEast = 50 cos(45) East + 50 sin (45) South

South = - North

Vel_ wind = 50 cos(45) mph East - 50 sin (45) mph North

Vel _wind = 35.35 mph East - 35.35 mph North

This means that the resulting velocity of the jet is equal to

Vel_jet_r = (500 mph - 35.35 mph) North + 35.35 mph East

Vel_jet_r = (464.645 mph) North + (35.35 mph) East

An the jet has a magnitude velocity of

||Vel_jet_r|| = sqrt ((464.645 mph)^2 + (35.35 mph)^2)

||Vel_jet_r|| = 465.993 mph

7 0

3 years ago