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3 years ago

What’s -4 + -9(-1 + -4w)

Mathematics

1 answer:

KIM [24]3 years ago

8 0

Answer:

36w+5

Step-by-step explanation:

First you have to distribute the negative 9 within the parentheses. -4+9+36w. Then combine like terms. Therefore resulting in 36w+5.

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Solve the equation. -7b=21

Kipish [7]

Answer:

b=-3

Step-by-step explanation:

-7b=21

-7b/-7=21/-7

b=-3

7 0

4 years ago

Read 2 more answers

Let f(x)=x^2+3x−4 .

Oxana [17]

I haven't done this kind of work in a bit, but I believe it's 8.

4 0

3 years ago

Read 2 more answers

Pls help me solve this question, also include step by step calculation ya. Thks

sp2606 [1]

$\displaystyle\\Answer:\ x=\sqrt{2}\ \ \ \ \ x=-\sqrt{2}\ \ \ \ \ x=\frac{ln5}{2}$

Step-by-step explanation:

$5x^2-x^2e^{2x}+2e^{2x}=10$

$Let:\ x^2=t \ \ \ \ \ e^{2x}=v\\Hence,\\5t-tv+2v^2=10\\5t-tv+2v^2-10=10-10\\5t-tv-10+2v^2=0\\t(5-v)-2(5-v)=0\\(5-v)(t-2)=0\\5-v=0\\5-v+v=0+v\\5=v\\5=e^{2x}$

Prologarithmize both parts of the equation:

$ln5=lne^{2x}\\ln5=2x*lne\\ln5=2x*1\\ln5=2x\\$

Divide both parts of the equation by 2:

$\displaystyle\\x=\frac{ln5}{2}$

$t-2=0\\t-2+2=0+2\\t=2\\x^2=2\\x=\sqrt{2} \\x=-\sqrt{2}$

6 0

1 year ago

Solve 8[7-(6x-6)]+6x=0

bazaltina [42]

8[7 - (6x - 6)] + 6x = 0

8[7 - 6x + 6] + 6x = 0

56 - 48x + 48 + 6x = 0

104 - 42x = 0 .

- 42x = - 104 .

x = 52 / 21

x ≈ 2.476

5 0

3 years ago

Read 2 more answers

A) {y=2x

sladkih [1.3K]

We can see that

both lines intersects at origin

so, the solution is x=0 and y=0

now, we will check each options

option-A:

$y=2x$

$y=-4x$

now, we can set them equal

and then we can solve for x

$-4x=2x$

$6x=0$

$x=0$

now, we can find y

$y=2*0$

$y=0$

so, solution is x=0 and y=0

so, this correct...........Answer

5 0

3 years ago