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Oxana [17]
4 years ago
11

What is the value of the expression below?

Mathematics
1 answer:
sergejj [24]4 years ago
4 0

Answer:

  B  15 1/2

Step-by-step explanation:

It evaluates to ...

  7 + 12 -(3 1/2) = 15 1/2 . . . . matches selection B

_____

Your calculator can help you with questions like this.

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In the figure below, YZA and YZX are right angles, XYZ and AYZ are congruent, and XZ = 10. What is the length of ?
lilavasa [31]

Answer:

  C.  10

Step-by-step explanation:

The given information tells you that triangles YZX and YZA are congruent, so ZA = ZX = 10.

3 0
3 years ago
In triangle ABC, the measure of angle BCA is 90, segment AC is 12 units, and segment BC is 9 units. If D is a point on hypotenus
Lubov Fominskaja [6]

Answer:

CD = 6 units

Step-by-step explanation:

In triangle ABC , AB is the hypotenuse then    AB =√(BC)² + (AC)²  = √(12)² + (9)²   =  15

AB = 15

sin ∠ABC  12/15   = 0,8   Then   arcsin (0.8)  =  53,1°

∠ABC  = 53,1°      and   ∠BAC  =  36,9°

Now the hypotenuse is 15 units and we need to find the lenght of segment

CD. If we divide the hypotenuse in three equal segment (of lenght 5 each) we at the same time are dividing the ∠ACB ( 90°),  in three equals angles of

30°.

If we now apply sin law

sin 30°/ 5    = sin 36,9°/CD

Then    CD  = 5 * sin 36.9° / sin 30°   ⇒  CD =[ 5* (9/15) ] / 1/2

CD = 6 units

3 0
4 years ago
Can someone help please
Airida [17]
Coordinate points on line(-3,-1) and (3,3)

Parallel lines have same slope
so 
m = (3+1)/(3+3) = 4/6 = 2/3

Answer
B. 2/3
8 0
3 years ago
Read 2 more answers
HELP PLS!! BRAINLIEST
Schach [20]

Answer:

50 degrees

Step-by-step explanation:

Hope this helps and have a great day!!!

6 0
3 years ago
Read 2 more answers
5 is 2% of what number?
il63 [147K]

Answer:

250

Step-by-step explanation:

2% of 250 is 5. Hope this helps!

8 0
3 years ago
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