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3 years ago

•Please help, multiple choice•

Mathematics

1 answer:

anzhelika [568]3 years ago

4 0

Answer: The answers are in the photo.

Step-by-step explanation:

To solve 11, we need to mark the triangle. Since we know that LMN is an isosceles triangle, we can use the iso. triangle theo. proof to mark some angles and sides.The iso. triangle theo. is that an isosceles triangle's opposite base angles are congruent, and the sides opposite of the bases angles are congruent to each other (meaning 2 sides are congruent and 2 angles are congruent.) Since T is the midpoint of LN, LT and TN are congruent. Triangles LMT and LNT also share a same side we can also mark.

To solve number 12, you can use CPCTC- congruent parts of congruent triangles are congruent. Anything in LMT and LNT are congruent to each other, making angles 1 and 2 congruent.

To solve number 13, you just need to place and plug. We know the right base vertice has a y of 0 because it is sitting on the x-axis. Because this triangle is isosceles, we can use the value of the top vertices x, multiply it by 2, which gets 2a as the x of the right base vertice. In the end, it's coordinates are (2a,0).

I apologize if this explanation is sloppy.

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Add [1/-4 3/5] [-2/6 -2/4]

brilliants [131]

Answer:

25/138

Step-by-step explanation:

1 Convert 4\frac{3}{5}4

to improper fraction. Use this rule: a \frac{b}{c}=\frac{ac+b}{c}a

ac+b

\frac{1}{-(\frac{4\times 5+3}{5})}(-\frac{2}{6}-\frac{2}{4})

−(

4×5+3

)

(−

−

)

2 Simplify 4\times 54×5 to 2020.

\frac{1}{-(\frac{20+3}{5})}(-\frac{2}{6}-\frac{2}{4})

−(

20+3

)

(−

−

)

3 Simplify 20+320+3 to 2323.

\frac{1}{-(\frac{23}{5})}(-\frac{2}{6}-\frac{2}{4})

−(

)

(−

−

)

4 Simplify \frac{2}{6}

to \frac{1}{3}

\frac{1}{-(\frac{23}{5})}(-\frac{1}{3}-\frac{2}{4})

−(

)

(−

−

)

5 Simplify \frac{2}{4}

to \frac{1}{2}

\frac{1}{-(\frac{23}{5})}(-\frac{1}{3}-\frac{1}{2})

−(

)

(−

−

)

6 Find the Least Common Denominator (LCD) of \frac{1}{3},\frac{1}{2}

. In other words, find the Least Common Multiple (LCM) of 3,23,2.

LCD = 66

7 Make the denominators the same as the LCD.

-\frac{1\times 2}{3\times 2}-\frac{1\times 3}{2\times 3}−

3×2

1×2

−

2×3

1×3

8 Simplify. Denominators are now the same.

-\frac{2}{6}-\frac{3}{6}−

−

9 Join the denominators.

\frac{-2-3}{6}

−2−3

10 Simplify -\frac{1}{3}-\frac{1}{2}−

−

to -\frac{5}{6}−

\frac{1}{-(\frac{23}{5})}\times \frac{-5}{6}

−(

)

−5

11 Move the negative sign to the left.

-\frac{1}{\frac{23}{5}}\times \frac{-5}{6}−

−5

12 Invert and multiply.

-\frac{5}{23}\times \frac{-5}{6}−

−5

13 Use this rule: \frac{a}{b} \times \frac{c}{d}=\frac{ac}{bd}

-\frac{5\times -5}{23\times 6}−

23×6

5×−5

14 Simplify 5\times -55×−5 to -25−25.

-\frac{-25}{23\times 6}−

23×6

−25

15 Simplify 23\times 623×6 to 138138.

-\frac{-25}{138}−

138

−25

16 Move the negative sign to the left.

-(-\frac{25}{138})−(−

138

)

17 Remove parentheses.

\frac{25}{138}

138

7 0

3 years ago

30 Points please help!! Please explain too!

sergiy2304 [10]

Initial: 200 feet = opp. side
Angle = 17.31, adj. Side = a
So tan (17.31) = opp. Side / adj. Side
tan (17.31) = 200 / a
--> a = 200/tan17.31 = 641.73
When stopped: adj. Still = a
Opp. Side still = 200, angle = 46.41
tan46.41 = 200 / a
--> a = 200/tan46.41 = 190.39
Now subtract those two distances to get the distance traveled from initial to when it stopped:
641.73 - 190.39 = 451.34 feet

3 0

3 years ago

-4x + 7.3x + 19.2x - 8.23 <br> and it’s not 22.5x - 8.38 by the way, I tried it .

Gekata [30.6K]

Answer:

You put 8.38 instead of 8.23

6 0

3 years ago

Read 2 more answers

Convert the equation (y + 2) = –1/3(x – 4) to the point-slope form. Then fill in the blanks below to describe how to graph the e

alisha [4.7K]

The point-slope form of the equation of the line is:

(y - y1) = m (x - x1)

So, (y + 2) = - 1/3 (x - 4) in the point-slope form is:

[y - (-2) ] = (-1/3) [ x - 4 ]

You must, then realize that the line passes through the point (4,-2) and its slope is - 1 /3.

That slope, -1 / 3, means that the function is decresing (because the slope is negative), and it decreases one unit when x increases 3 units.

Now you can fill in the blanks in this way:

Plot the point (4, -2), move 1 unit down, and 3 units over to find the next point on the line.

7 0

3 years ago

Find the measure of the reference angle for an angle of 152º.

AlladinOne [14]

Answer:

28 deg

Step-by-step explanation:

Reference angle is the smallest angle formed by the terminal ray, x-axis, and origin. So at 180 you are on the x-axis so just for this question you have to do 180-152=28.

The reference angle should be a positive between 0 and 90 degrees.

7 0

3 years ago