3 years ago

Please help! All the questions.

Mathematics

1 answer:

Yuri [45]3 years ago

5 0

5) 33-25
6) 33-35
Yes
8)’10

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Please help asap<br><br> solve x^4+5x^2+4=0

const2013 [10]

Answer:

$x=\pm i\text{ or }x=\pm2i$

Step-by-step explanation:

So we have the equation:

$x^4+5x^2+4=0$

Let's let u be equal to x². So:

$u^2+5u+4=0$

Factor:

$(u+1)(u+4)=0$

Zero Product Property:

$u+1=0\text{ or } u+4=0$

Subtract:

$u=-1\text{ or }u=-4$

Replace:

$x^2=-1\text{ or }x^2=-4$

Take square root:

$x=\pm\sqrt{-1}\text{ or }x=\pm\sqrt{-4$

Simplify:

$x=\pm i\text{ or }x=\pm2i$

7 0

2 years ago

There are 15 animals in a barn. These animals are horses and chickens. There are 44 legs in all. Write a system of equations tha

olga55 [171]

Answer:

well

Step-by-step explanation:

44 legs and 15 animals you have to subtract

7 0

3 years ago

Find the circumference and area of the circle. Round to the nearest tenth.<br> 2 m

Fed [463]

Radius=2m

Circumference:-

$\\ \bull\sf\dashrightarrow 2\pi r$

$\\ \bull\sf\dashrightarrow 4(3.14)$

$\\ \bull\sf\dashrightarrow 12.56m$

Area.

$\\ \bull\sf\dashrightarrow \pi r^2$

$\\ \bull\sf\dashrightarrow 3.14(2)^2$

$\\ \bull\sf\dashrightarrow 3.14(4)$

$\\ \bull\sf\dashrightarrow 12.56m^2$

8 0

2 years ago

Read 2 more answers

If 2/3=x/12 , what is the value of x?

Andru [333]

2/3=x/12
Use cross multiply
2*12=3*x
24=3x
Divided both side by 3
24/3=3x/3
x=8
Check:
2/3=x/12
Substitute x with 8
2/3=8/12
2/3=(8/4)/(12/4)
2/3=2/3. As a result, x=8. Hope it help!

8 0

2 years ago

Read 2 more answers

What happens when the line and the slope increase and decrease

Ilya [14]

When you use this formula slope = rise/run like rise over run than you find the slope. rise me y and run means x. So when the line slopes downwards to the right it became negative slope as x increases and when line sloped upward to the right the slope become positive as y decreases.

formula to find slope: slope = rise/run or y/x

8 0

3 years ago