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ValentinkaMS [17]
3 years ago
13

Can someone help me with these two proof questions?

Mathematics
1 answer:
timurjin [86]3 years ago
6 0

The proofs of above Questions is in attachment !

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What’s 2 3/4 divided by 2??
Alex17521 [72]

Answer: 1.375


Step-by-step explanation:

Im not good at it, but this may be right?

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3 years ago
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The experiment proceeded as normal, with the experimental group hearing about the potential presence of a gun as the confederate
Vika [28.1K]

Answer:

The answer is "The threat to internal validity is mortality".

Step-by-step explanation:

It signifies that while in terms of your study, persons were "morning." It usually signifies when people leave the studies. There will be only likely if indeed the experiment lasts a long period that it'll be a substantial danger to validity and reliability because the chance for drops increases. Eight content validity risks are history, maturity, instrument, test, choice, average regress, human engagement, and mortality.

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3 years ago
Tan30°+cos30°÷tan30°×cos30°​
jonny [76]

Answer:

{1/√3+1/2} ÷{1/√3× 1/2}

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4 0
3 years ago
Which is smaller,two-thirds of 27 or two-fifths of 20?
shtirl [24]
" of " means multiply

2/3(27) = 54/3 = 18
2/5(20) = 40/5 = 8

so 2/5 of 20 is smaller
7 0
3 years ago
Which relationship describes angles 1 and 2?
MissTica
<span>1) supplementary angles => sum of angles' measure is 180°


Two lines intersecting creating four angles with the left obtuse angle labeled one and the acute angle to the right labeled two

= > angle 1 +  angle 2 = 180°

Then those two match.


2) complementary angles => sum of the two angles = 90°

Two lines intersecting in a right angle with a square indicating a right angle in quadrant one and a ray splitting quadrant two with a two labeling the left angle and one labeling the angle on the right

=> angle 2 + angle 1 = 90°

Then those two match

3) vertical angles

Two parallel horizontal lines intersected by a vertical line with a square indicating a right angle in quadrant one of the top line and a one labeling the angle in quadrant two and two labeling quadrant four of the top line

Those two matches because the angle label 1 and the angle label 2 are vertical angles as per the definittion.

4) adjacent angles

Two lines intersecting in a V shape with the left angle of one hundred fifty seven degrees and a bottom angle of X degrees

Those two match becasue the angle of 157° and the angle of X° are adjacent.
</span>
5 0
3 years ago
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