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Alborosie
3 years ago
13

In DCAB, If DB=38, What is DC? 38 45 52 112

Mathematics
1 answer:
dedylja [7]3 years ago
8 0

Answer:

C. 52°

Step-by-step explanation:

In ∆CAB, m<A = right angle = 90°

m<B = 38°

m<C + m<A + m<B = 180° (sum of ∆)

m<C + 90° + 38° = 180° (substitution)

m<C + 128 = 180

m<C = 180 - 128 (subtraction property of equality)

m<C = 52°

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A satellite can move at 17,000 miles per hour. how many hours will it take to reach a star that is three light years away? recal
Feliz [49]
Distance to the star in light years = 3 * 0.62 * 9.5 * 10^12  =  1.767 * 10^13 miles

dividng this by 17,000  gives  1.039411765 * 10^9 hours
7 0
4 years ago
Sam Whittington was the fastest cyclist on record (in 2009) with a speed of 37.5 m/s. Calculate the time taken in hours to cycle
vitfil [10]

Answer:

39.407 hour

Step-by-step explanation:

T = D/S

37.5 m/s in km/h

=375×18/10×5

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4 0
2 years ago
X 4) Find the product of 4 x 2 3/4. 18 3/4 O 7 1/2 11 O 14​
Vadim26 [7]

9514 1404 393

Answer:

  11

Step-by-step explanation:

  4 × (2 3/4) = 4×2 + 4×(3/4) = 8 + 3 = 11

or

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5 0
3 years ago
2X(X+y) + 2y(3X-y)<br> Please help me
tankabanditka [31]

Answer:

2x^2 + 8xy - 2y^2

Step-by-step explanation:

2X(X+y) + 2y(3X-y)

2x^2 + 2xy + 6yx - 2y^2

2x^2 + 8xy - 2y^2

7 0
3 years ago
AB= 4x + 7 and BC = 20x - 5 <br> AB ~= BC
Mariana [72]

The value of the variable x is 3/4

<h3>What are congruent segments</h3>

Congruent segment are segments with equal or congruent lengths.

From the information given, we have that line AB is approximately equal to line BC. This is represented as;

AB = BC

Where;

  • AB = 4x + 7
  • BC = 20x - 7

Now, let's equate the expressions

4x + 7 = 20x - 5

collect like terms

4x - 20x = - 5 - 7

- 16x = - 12

Make 'x' the subject of formula

x = -12/-16

x = 3/4

Thus, the value of the variable x is 3/4

Learn more about line segments here:

brainly.com/question/1388250

#SPJ1

8 0
2 years ago
Read 2 more answers
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