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SVETLANKA909090 [29]
3 years ago
12

One day, a person went to a horse racing area. Instead of counting the number of humans an horses, he conuted 74 heads and 196 l

egs. How many humans and horses were there
Mathematics
1 answer:
DerKrebs [107]3 years ago
7 0
Data:

Humans (x) = 2 Legs
Horses (y) = 4 Legs

74 Heads
196 Legs

Solving:

Addition method

\left \{ {{x + y =74} \atop {2x + 4y =196}} \right.

Simplify by (-4) The first equation

\left \{ {{x + y =74(-4)} \atop {2x + 4y =196}} \right.
\left \{ {{-4x - \diagup\!\!\!\!\!4y =-296} \atop {2x + \diagup\!\!\!\!\!4y =196}} \right.
\left \{ {{-4x =-296} \atop {2y =196}} \right.
-2x = -100.simplify(-1)
2x = 100
x = \frac{100}{2}
\boxed{x = 50}

Now, to find the number of horses, I will use the following equation and I will replace the found value, we will have:

x + y = 74
50+y = 74

Number with incognito are to the left of the equality and numbers without incognito are to the right, remembering that when changing of side changes the signal.

y = 74-50
\boxed{y = 24}

Answer:
Humans = 50
Horses = 24


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If the sum of three consecutive numbers is 36. Find the numbers.
aleksandrvk [35]

Answer:

11, 12, 13

Step-by-step explanation:

x is the first number

(x + 1) is the second number

(x + 2) is the third number

x + x+1 + x+2 = 36

3x + 3 = 36

3x = 36 - 3

3x = 33

x = 11  ← the first number

the second number  = x + 1 = 11 + 1 = 12

the third number = x + 2 = 11 + 2 = 13

8 0
3 years ago
Read 2 more answers
36 singers in the choir 5/6 are boys how many of the singers are girls
Aleksandr [31]

Answer:

6

Step-by-step explanation:

5/6 of 30 = ?

5            x

----    =   ----

6             36

36 x 5 = 180

180/6 = 30

That means 30 singers are boys.

36 - 30 = 6 (the number of girls)

5 0
3 years ago
Evaluate and simplify. Enter your answer as an integer or as a proper fraction or mixed number in simplest form. (− 3/4 / 4/5)=
BlackZzzverrR [31]

Answer:

-3/80

Step-by-step explanation:

(− 3/4 / 4/5) = -0.0375 (calculator)

-0.0375 / 1 * 10000 / 10000 = 375 / 10000

375 / 10000 (divided by) 125 / 125 = 3 / 80

negative decimal = negative fraction (-0.375 = -3 / 80)

7 0
2 years ago
Read 2 more answers
4/3y=48<br><br>solve for y<br><br>simplify answer as much as posible
Helga [31]
<h2>If you mean :</h2>

\frac{4}{3y}  = 48 \\

Inverse both sides

\frac{3y}{4}  =  \frac{1}{48}  \\

Multiply both sides by 4

4 \times  \frac{3y}{4}  = 4 \times  \frac{1}{48}  \\

3y =  \frac{4}{48}  \\

3y =  \frac{4 \times 1}{4 \times 12}  \\

3y =  \frac{1}{12}  \\

Divide both sides by 3

3y \div 3 =  \frac{1}{12}  \div 3 \\

y =  \frac{1}{12}  \times  \frac{1}{3}  \\

y =  \frac{1}{36}  \\

_____________________________________________

<h2>If u mean : </h2>

\frac{4}{3} y = 48 \\

Multiply both sides by the 3

3 \times \frac{4}{3} y = 3 \times 48 \\

4y = 3 \times 48

Divide both sides by 4

4y  \div 4 = 3 \times 48 \div 4

y =  \frac{48 \times 3}{4}  \\

y =  \frac{4 \times 12 \times 3}{4 \times 1}  \\

y = 12 \times 3

y = 36

6 0
2 years ago
A builder was building a fence. In the morning, he worked for 2/5 of an hour. In the afternoon, he worked for 9/10 of an hour. H
Bas_tet [7]

Hey there! I'm happy to help!

We want to see how many times bigger 2/5 is than 9/10. Let's call how much bigger 2/5 is b and solve below.

9/10b=2/5   (2/5 is b times larger than 9/10)

We divide both sides by 9/10, so your division would be 2/5÷9/10.

b=4/9

Therefore, the builder worked 4/9 times as long in the morning as he did in the afternoon.

Have a wonderful day! :D

4 0
3 years ago
Read 2 more answers
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