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Novosadov [1.4K]
3 years ago
14

Describe and correct the error in finding DC

Mathematics
1 answer:
sleet_krkn [62]3 years ago
6 0

Answer:

DC = 2

Step-by-step explanation:

The wrong equation was used.

The right equation to use based on the midsegment theorem of a trapezoid is:

MN = ½(AB + DC)

MN = 8

AB = 14

Substitute

8 = ½(14 + DC)

Multiply both sides by 2

8*2 = ½(14 + DC)*2

2*8 = 14 + DC

16 = 14 + DC

16 - 14 = 14 + DC - 14

2 = DC

DC = 2

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A map of an island is shown on a half-centimeter grid,
kupik [55]

Answer:

The answer is below

Step-by-step explanation:

A map can either be scaled up or scaled down. If the map is enlarged then it is scaled up and hence represented by n:1, where n > 1. While is the map is reduced, it is scaled down and is represented by 1 : n, where n < 1.

Since one box has a length of 1 cm by 1 cm. The distance between A and B is 4 boxes = 4 cm = 0.04 m

Hence the scale is given as 1:n, where n > 1. n is gotten from:

n = 960 m / 0.04 m = 24000

Therefore the scale is 1 : 24000

7 0
2 years ago
The answer to all of these problems
timurjin [86]
Its easier to ask somebody face-to-face dude
4 0
3 years ago
What is the value of H?
Rasek [7]

Answer:

55

Step-by-step explanation:

Because the base is a straight line, each of the unknown angles in the triangle are 180 - 2h. This means that 360 - 4h + 40 = 180, so 400 - 4h = 180.

Now subtract -4h + 180 from both sides to get 220 = 4h so h = 55.

6 0
3 years ago
What are the vertex and axis of symmetry of the parabola y = x2 – 16x + 63?
jonny [76]

Answer:

A

Step-by-step explanation:

Remember that the x-value of the vertex when an equation is given in standard form can be found with the equation \frac{-b}{2a}. So, we can take the coefficients from the equation and plug them in.

\frac{-b}{2a} \\\frac{-(-16)}{2(1)}\\\\\frac{16}{2}\\\\8

Now we know that the x-value of the vertex is 8. Next, the equation for the y-value is c-ah^2, where h is the x-value of the vertex (8).

(63)-(1)(8)^2\\63-64\\-1

So the vertex is (8,-1).

Finally, the axis of symmetry is the x-value of the vertex, also called h.

Final answer, vertex: (8,-1) and axis of symmetry: x=8

Hope this helps!

3 0
3 years ago
Can someone help me with my math work please?
MArishka [77]

I Will Number All The Answers Below, and give my best explanation :D                          

6.

Jay Has 10 Tallies, When There Is 10 Tallies, Normally It Means the number 10

Madison Only Has 3 Tallies, therefore Madison has 3

Kimberly Has 7 Tallies, Which Means Kimberly has 7

7. You See Those Squares On The Graph? You Are Going to color them out

Jay Has 10 tallies, so you will will those squares out 10 times on Jays side

Madison Has 3 Tallies, so you are going to fill 3 Boxes for maddison

Kimberly Has 7, So you are going to fill Kimberly's box 7 times

8. How Many Bottles Did Kimberly Bring? She Brung 7 Bottles

9. Maddison Brough The Least Bottles, Which is 3

Hope This Helped :D

-Deadly

4 0
3 years ago
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