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horrorfan [7]
3 years ago
12

PLEAD HELP ME FAST!!!!

Mathematics
1 answer:
Anvisha [2.4K]3 years ago
3 0

Answer:

i can't really see to clear ..

Step-by-step explanation:

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One day, a person went to a horse racing area. instead of counting the number of humans and horses, he counted 72 heads and 192
Lunna [17]
H-human a-horse
h+a= 72
2h+4a=192

then do h=72-a
substitute that into the second equation
2(72-a)+4a=192

multiple out
144-2a+4a=192
2a=48
a=24
substitute a into the first equation
h+24=72
h=48
humans- 48
horses- 24
8 0
3 years ago
The sum of three numbers is 103. The second number is 5 less than the first. The third number is 4 times the first. What are the
madreJ [45]

Answer:

The numbers are 18, 13, and 72.

Step-by-step explanation:

Let the three numbers be represented by <em>a, b</em>, and <em>c</em>.

The sum of the three is 103. Thus, we can write that:

a+b+c=103

The second number is five less than the first. So:

b=a-5

And the third number is four times the first. So:

c=4a

Substitute:

a+(a-5)+(4a)=103

Solve for <em>a</em>. Combine like terms:

6a-5=103

Add five to both sides:

6a=108

And divide both sides by six. Therefore:

a=18

So, the first number is 18.

Since the second number is five less than the first, the second number is 13.

And since the third number is four times the first, the third number is 72.

6 0
2 years ago
What trig function would I use to solve for x?
IRINA_888 [86]

Answer:

Cosine

Step-by-step explanation:

SohCahToa

The sides are: adjacent to the angle and are the hypotenuse.

(hope this helps :P)

8 0
2 years ago
Jeffery runs at an average speed of 8 mph, and he bikes at an average speed of 14 mph. Yesterday, Jeffery ran for x hours. How f
Mrac [35]

Answer:

8x miles

Step-by-step explanation:

  • runs with speed 8 mph
  • bikes at an average speed of 14 mph

distance = speed * time

Here the speed for run is 8 mph and time is x hours

So distance covered: 8 * x = 8x miles.

4 0
2 years ago
If 1 inch on a map represents 20 miles, what is the mileage represented by 2.5 inches?
SOVA2 [1]

Answer:

50 miles(D)

Step-by-step explanation:

20 x 2.5

5 0
3 years ago
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