C. an isosceles triangle has 2 equal sides.
the reason b and d aren’t true is because the sides add up to be less or equal to the longest side and to make a triangle the 2 sides have to add up to be more than the longest side.
Answer:
collect like terms x=5-4=1
Answer:
Step-by-step explanation:
a) While the mean is below 4 the standard deviation tells us that there is a pretty high chance for the value to be above 4. One standard deviation away is 1.79 - 5.65. We are concerned with things over 4 so we'll look at the upper half, which is 3.72 - 5.65. Being one standard deviation to the right means there is a 34.1% chance of the readings being in this range. And there is even chances of it being slightly higher, though that is comparatively low. But even as low as 10% is usually considered too high a chance to risk. If you don't understand how the standard deviation got me those percents let me know.
b) alternative hypothesis is always the option where we want to prove it. So we want to prove the concentration is 4 or above. So the null is less than 4 and the alternative is greater than or equal to 4. Do you know the correct symbols? if not I can get those written out. As for the p value we need the confidence level for the question, do you have that?
Answer:
C.
(0.525, 0.635)
Step-by-step explanation:
0.58 +/- 0.994sqrt(0.58×0.42/80)
0.58 +/- 0.05485042953
[0.5251495705 , 0.6348504295]
The shapes are being used instead of variables.
For problem 4; start with clue 2, then clue 3, then clue 4, and lastly do clue 4.
<u>Clue 2</u>
3 · square - 8 = 19
3 · square = 27 <em>added 8 to both sides</em>
square = 9 <em>divided both sides by 3</em>
<u>Clue 3</u>
2 · triangle + 3 = -3
2 · triangle = -6 <em>subtracted 3 from both sides</em>
triangle = -3 <em>divided both sides by 2</em>
<u>Clue 4</u>
square + triangle = 6
(9) + (-3) = 6 <em>substituted solutions from Clue 2 and Clue 3</em>
6 = 6 <em>True statement confirms that Clues 2 & 3 are correct</em>
<u>Clue 1</u>
star + square = 12
star + (9) = 12 <em>substituted solution from Clue 2 </em>
star = 3 <em>subtracted 9 from both sides</em>
Answer: triangle = -3, star = 3, square = 9
For problem 5; do the same thing as problem 4 and start with Clue 2
Answers: triangle = -2, star = 10, square = 8