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3 years ago

A farm has chickens and cows. All the cows have 4 legs and all the chickens have 2 legs.

Mathematics

1 answer:

Sladkaya [172]3 years ago

5 0

Answer:

oh dude this is such a cool riddle i think the answer is ..... 62

Step-by-step explanation:

if there are 82 legs .... and you said there are 5 cows and cows have four legs so that is gonna be 5x4 which equals to 20 and then we can subtract 20 with 82 and that will give the answer as ..... 62 !!!!!!! yeaaaaaa

make me brainliest or whatever .... i.d.k .... just kidding make me brainliest NOW !!!!!! please

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Pls solve the simultaneous equation in the attachment.

siniylev [52]

Answer:

Part a) The solution is the ordered pair (6,10)

Part b) The solutions are the ordered pairs (7,3) and (15,1.4)

Step-by-step explanation:

Part a) we have

$\frac{x}{2}-\frac{y}{5}=1$ ----> equation A

$y-\frac{x}{3}=8$ ----> equation B

Multiply equation A by 10 both sides to remove the fractions

$5x-2y=10$ ----> equation C

isolate the variable y in equation B

$y=\frac{x}{3}+8$ ----> equation D

we have the system of equations

$5x-2y=10$ ----> equation C

$y=\frac{x}{3}+8$ ----> equation D

Solve the system by substitution

substitute equation D in equation C

$5x-2(\frac{x}{3}+8)=10$

solve for x

$5x-\frac{2x}{3}-16=10$

Multiply by 3 both sides

$15x-2x-48=30$

$15x-2x=48+30$

Combine like terms

$13x=78$

$x=6$

Find the value of y

$y=\frac{x}{3}+8$

$y=\frac{6}{3}+8$

$y=10$

The solution is the ordered pair (6,10)

Part b) we have

$xy=21$ ---> equation A

$x+5y=22$ ----> equation B

isolate the variable x in the equation B

$x=22-5y$ ----> equation C

substitute equation C in equation A

$(22-5y)y=21$

solve for y

$22y-5y^2=21$

$5y^2-22y+21=0$

Solve the quadratic equation by graphing

The solutions are y=1.4, y=3

see the attached figure

Find the values of x

For y=1.4

$x=22-5(1.4)=15$

For y=3

$x=22-5(3)=7$

therefore

The solutions are the ordered pairs (7,3) and (15,1.4)

3 0

4 years ago

Jenny wants to make a scarf that uses 24 yards of blue yarn how many yards of white yarn will she need

dalvyx [7]

Answer:

Step-by-step explanation:

she will only use blue yarn

3 0

3 years ago

Read 2 more answers

1/8 (16k-24) + 1/5 (2+10k) Show your work.

bearhunter [10]

16/8k - 24/8 + 2/5 + 10/5k

2k - 3 + 2/5 + 2k

4k - 13/5

Hope it helps :)

6 0

3 years ago

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kogti [31]

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3 years ago

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Is this answer correct?

slavikrds [6]

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