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denis23 [38]
2 years ago
6

I need help with these two

Mathematics
1 answer:
Alika [10]2 years ago
4 0

Answer:

19. A

20. A

Step-by-step explanation:

19. tan(53)=15/x

x(tan(53))=15

x=15/(tan53))

x=11.3 feet


20. tan(60)=12/x

x(tan(60))=12

x=12/(tan(60))

x=6.93, or 4sqrt3

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1 point
damaskus [11]

Answer:

Step-by-step explanation:

I think the question is  card(A)=20,card(B)=15,card(A∩B)=10, then what iscard(A∪B)  

You can solve this question by drawing a picture like this to visualize the problem.

Thus the answer is  card(A∪B)=card(A)+card(B)−card(A∩B)=25

8 0
3 years ago
He radius of a sphere is 6 centimeters. Which is the volume of the sphere?
Katarina [22]

Answer:

904.32

Step-by-step explanation:

i think this is correct

5 0
3 years ago
Two trains leave towns 1490 kilometers apart at the same time and travel toward each other. One train travels 20 km/h slower tha
antiseptic1488 [7]

Answer:

the rate of each train is 139 km/h and 159 km/h.

Step-by-step explanation:

let

v = the rate of the slower train

v + 20 = the rate of the faster train

d = 1490 km the distance that the two train will travel

t = 5 hr the time of the travel

since speed = distance/time => distance = speed*time

v*t + (v+20)t = d

5v + 5(v + 20) = 1490

5v+5(v+20)=1490

Step 1: Simplify both sides of the equation.

5v+5(v+20)=1490

5v+(5)(v)+(5)(20)=1490(Distribute)

5v+5v+100=1490

(5v+5v)+(100)=1490(Combine Like Terms)

10v+100=1490

10v+100=1490

Step 2: Subtract 100 from both sides.

10v+100−100=1490−100

10v=1390

Step 3: Divide both sides by 10.

10v/10 = 1390/10

v = 139km/h

Next

we add 139 to 20

139 + 20 = 159 km/h

the rate of each train is 139 km/h and 159 km/h.

7 0
2 years ago
Jacob is saving for a new bicycle, which costs $175. He already saved $35. His goal is to have enough money saved in six weeks t
dezoksy [38]
A is the answer i’m pretty positive
8 0
3 years ago
Read 2 more answers
What is the answer to this problem if you need to find out the area?
PolarNik [594]

Answer:

17.28in

Step-by-step explanation:

To find the area of a triangle, multiply the base by the perpendicular height (the length from the point opposite the base, to the base, which makes a 90-degree angle with the base), and half it:

7.2*4.8=34.56

34.56/2=17.28

8 0
2 years ago
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