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lys-0071 [83]
3 years ago
7

PLEASE PLEASE SOMEONE PLEASE HELP ME PLEASE PLEASE SOMEONE PLEASE HELP ME WITH MY HOMEWORK PLEASE HELP

Mathematics
2 answers:
bogdanovich [222]3 years ago
8 0

Answer:

0.725

Step-by-step explanation:

Serhud [2]3 years ago
8 0

Answer:

.275

3.6

Step-by-step explanation:

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The vectors x and y are unit vectors that make and angle of 30 degrees with each other. Calculate the value of | 2x + y | and th
ICE Princess25 [194]

Answer: the value of | 2x + y | = 1.39

the direction of 2x + y = 21° 

Step-by-step explanation:

Given that the vectors x and y are unit vectors that make and angle of 30 degrees with each other.

Let assume that unit vector x is along the positive x-axis, and unit vector y is at +30°.

Therefore 

2x-y=

2< 1,0 > - < cos(30),sin(30) >

=<2-(√2)/2, 0-1/2>

and

|2x-y|=√((2-(√2)/2)² + (-1/2)^2)

=1.3862 

Therefore the value of | 2x + y | = 1.39

=atan((-1/2)÷(2-(√2)/2))

=atan(1.29289/-0.5)

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= -21.143° 

Therefore the direction of 2x + y is

21° 

5 0
3 years ago
Is the negative square root of 9 rational or irrational ​
Nana76 [90]

Answer:

Rational

Step-by-step explanation:

-9 is rational because 9 is a perfect square and all perfect squares are rational.

6 0
3 years ago
A dependent means t-test determines if the differences between scores on the pretest and posttest measures differ significantly
lara31 [8.8K]

A dependent means t-test determines if the differences between scores on the pretest and post-test measures differ significantly from Zero(0).

Benefits of pre-test measurements

This design is superior to the post-test-only control design because it adds pre-tests. Addition of pre-test: Improve your design ability to detect effects. You can investigate the impact of interventions on various sublevels of pretesting.

The design of the pre-test and post-test is similar to the in-subject experiment. In this experiment, each participant is first tested in control conditions and then in therapeutic conditions.

Learn more about pretesting. here: brainly.com/question/968894

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2 years ago
Y=-2(×-3)(x-2) to standard form <br><br>(show work)​
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y=-2x^2+10x-12

Step-by-step explanation:

graph is shown in image below

4 0
3 years ago
Write the equation of the line in slope-intercept form of the statement
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