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2 years ago

How to know if the tringal is congruent

2 answers:

7 0

If two angles and the included side of one triangel are equal to the corresponding angel and the side of another triangel, the triangles are congurent.

Annette [7]2 years ago

5 0

Answer:

Measure all sides of the triangle (all 3 sides), and depending on the lengths see if they are all equal, if two are equal, or if there are no equal sides at all. If there are all equal side lengths you have an equilateral triangle that has 3 congruent, aka equal sides.

Step-by-step explanation:

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Please answer the question from the attachment.

spin [16.1K]

Hi,

7x²-2x-8=0, so a = 7, b= - 2, and c = -8.

You just need to apply the formula for square equations:

$x_{1,2}=\dfrac{-b\pm\sqrt{b^2-4ac}}{2a}=\dfrac{-(-2)\pm\sqrt{(-2)^2-4\cdot 7\cdot (-8)}}{2\cdot 7}=\dfrac{2\pm\sqrt{228}}{14}=\dfrac{2\pm\sqrt{4\cdot 57}}{14}=\\\\=\dfrac{1\pm\sqrt{57}}7\Rightarrow x_1=\dfrac{1-\sqrt{57}}7,\;and\;x_2=\dfrac{1+\sqrt{57}}7.$

Green eyes.

7 0

3 years ago

Conclusions from data - confidence intervals and margins of error <br> right answers only!

mrs_skeptik [129]

Answer:

1. .1010 2. 2.064 3. .393

Step-by-step explanation:

5 0

3 years ago

The table shows the relationshio between 2 variables. Which selection describes the relationship?

rodikova [14]

Answer: C) decreasing; linear

Its decreasing because y is decreasing as x is increasing. If you draw out a graph, the line will go downhill as you move from left to right

This is a straight line as each time the decrease is the same. In this case, each time x increases by 1, the y drops by 6. So the slope is -6/1 = -6. The negative slope means decrease. If you picked any two points from the table, you can use the slope formula m = (y2-y1)/(x2-x1) and you'd find that m = -6 each time.

4 0

4 years ago

Is (-7/8) with exponent 12, positive or negative?

bulgar [2K]

Answer:

There is a 100% possibility that it can be Positive

Step-by-step explanation:

Because it will actually equal 0.201417238

You don't believe me?

Then use a calculator, and if you still don't believe me, the truth is that you're wrong!

But hope this helps

3 0

3 years ago

Read 2 more answers

Graph the system of inequalities presented here on your own paper, then use your graph to answer the following questions:

grigory [225]

Answer:

Part A: The graph of the system is plotted at y-intercepts of 3 and -4. The line of the first equation is dashed and shaded below. The line of the second equation is dashed and shaded above. The solution area is between the second and third quadrants.

Part B: No, the point (-4, 6) is not in the solution are because it only fits into the first equations solution area. [6=2(-4)+3 solved is 6=-5, this is not a true statement.]

Step-by-step explanation:

Part A: Each equation {y>2x+3, y<-3/2x-4} is already in slope intercept form and can be graphed. In the first equation we know that there is a y-intercept of 3 and a slope of 2. This is shown as as a upward moving line with plot points such as (-2,-1), (-1,1), (0,4), (1,6), and so on. In the second equation we know that there is a y-intercept of -4 and a slope of -3/2. This is shown as a downward moving line with plot points such as (0,-4), (-2,-1), (-4, 2), and so on. (See graph below)

Part B: The plot point (-4, 6) is not included in the solution area of the systems. This can be seen on the graph. And, proven mathematically by plugging in the point into the equations:

y=2x+3 plug in the points (6)=2(-4)+3
solve (6)=2(-4)+3 ... 2(-4)=-8 ... -8+3=-5 ... 6 = -5 is not a true statement

So, already we know that this plot point is not an answer to the system. Let's continue anyway.

y=-3/2x-4 plug in the points (6)=-3/2(-4)-4
solve (6)=-3/2(-4)-4 ... -3/2(-4)= 6 ... 6-4 = 2 ... 6=2 is not a true statement.

7 0

3 years ago