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son4ous [18]
3 years ago
8

13,14,15,16, and 17 please! Respond as fast as possible Show work for all please!!! Thanks!

Mathematics
2 answers:
katen-ka-za [31]3 years ago
4 0
13.  # books * 2
97 * 2 
A

14.   4.5 km/21 min  = 7.5 km = x min
cross multiply
4.5x = 7.5(21)
4.5x = 157.5
x = 35 min
B

15.  9.60/12 = x/4
cross multiply
12x = 4(9.60)
12x = 38.40
x = 3.20
C

16.  18% move decimal two places to the left and drop the % sign 
0.18
A

17.  d = rt
d = 2(55)
d = 110 miles
150 - 110 = 40 miles remaining
A
netineya [11]3 years ago
3 0
13) A
14)B
15)C
16)A
17)A
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ou are standing 45 meters from the base of the Empire State Building. You estimate that the angle of elevation to the top of the
svetlana [45]

Answer:

443.2m

Step-by-step explanation:

Given in the question that,

distance from building to me = 45m

angle of elevation = 82°

building is 123 m + x m high

If we closely observe then this situation make a right angle triangle and we will use trigonometry identity to solve the question.

Step 1

tan(82) = y / 45

y = 45tan(82)

y = 320.2 m

Step 2

Hence the height of building is y + 123m. So, plug the value of y in this

320.2 + 123 = 443.2

8 0
4 years ago
Find value of unknown angle(s) and state reason/theorem why
Anna71 [15]
Y=90° by inspection
w=180-(50+y)=160-(50+90)=40° 
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z=180-(x+90)=180-(43+90)=47° 
3 0
3 years ago
Translate the percent word problem in a equation: If 5 is increased to 8, the increase is what percent of the original number?
-Dominant- [34]
If you increased 5 to 10, then I would have doubled the number 5 and this is a 100% increases.
If you increased 5 to 7.5, then this is 50% increase, because 50% of 5 is 2.5 and 5 + 2.5 = 7.5
If you increased 5 to 6, then this is a 20% increase,because 5 + 1 = 6 and 1 is 20% of 5
If you increased 5 to 7, then this is a 40% increase,because 5 increased by 2, 5 + 2 = 7, and 2/5 = 40%
If you increased 5 to x, then 5 was increased by x/5×100%
For example 5 to 9 is a4/5×100%=80% increase

So here 5 increases by 8, 5 + 3 = 8, thus the percentage increase is3/5×100%=0.006
8 0
3 years ago
Read 2 more answers
The sum is two numbers is 65. The difference of the two numbers is 17. Write systems of equations and find two numbers
kobusy [5.1K]

Answer:

41 and 24

Step-by-step explanation:

x+y=65 -------(A)

x-y=17 -------- (B)

(A)+(B)

(x+y)+(x-y)=65+17

2x=82

x=41

(B)===>

41-y=17

y=41-17

y=24

5 0
4 years ago
Which graph represents a degree three polynomial function with a negative leading<br> coefficient?
Vadim26 [7]

The graph of a 5th-degree polynomial with a negative leading coefficient will start at (-∞, +∞) and end at (+∞, -∞). That is, it will have the overall shape \, downward from left to right. Along the way, it may change direction 0, 2, or 4 times, and may intersect the x-axis up to 5 times.

Only one of the graphs shown has the described end behavior. All of the others have the general shapes ...

7 0
3 years ago
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