Please help me with my homework, i promise its worth it

Mathematics

1 answer:

eimsori [14]3 years ago

3 0

1.
x+4=3x
4=3x-x
4=2x
x=2

2.
x-8=-9
x=-9+8
x=-1

3.
4m+5-3m
4m-3m=-5
m=-5

You might be interested in

There are 120 minutes in 2 hours .how many minutes arethere in 5 hours?

laiz [17]

Hey there the answer would be 300 minutes

4 0

4 years ago

Read 2 more answers

Help!!!!!!!!!!!!!!!!!!!!!!!

Nataly [62]

Hello.

Firstly, let's isolate x on the equation:

$\mathsf{f(x) = 3x + 3} \\ \\ \mathsf{y = 3x + 3} \\ \\ \mathsf{-3x = -y + 3} \\ \\ \mathsf{x = \dfrac{-y + 3}{3}}$

Now, we can replace 'x' for 'y' and vice-versa:

$\mathsf{f^{-1}(x) = \frac{-x + 3}{3}`}$

Hope I helped.

4 0

3 years ago

Please solve: x^2+4x-8=0

Bezzdna [24]

$x^2+4x-8=0\\\\\underbrace{x^2+2x\times2+2^2}_{use:(a+b)^2=a^2+2ab+b^2}-2^2-8=0\\\\(x+2)^2-4-8=0\\\\(x+2)^2-12=0\\\\(x+2)^2=12\iff x+2=\sqrt{12}\ or\ x+2=-\sqrt{12}\\\\x=\sqrt{4\times3}-2\ or\ x=-\sqrt{4\times3}-2\\\\x=\sqrt4\times\sqrt3-2\ or\ x=-\sqrt4\times\sqrt3-2\\\\\center\boxed{x=2\sqrt3-2\ or\ x=-2\sqrt3-2}$

4 0

3 years ago

Read 2 more answers

What is the root 81/289 1/2 9/17 -1/2 -9/17

Usimov [2.4K]

Divide 81/289 and see the decimals value
then check each answer choice and the one with the same decimals value as your question is your answer

6 0

3 years ago

3. Simplify: 2^2√2x+6^4√2x

Whitepunk [10]

I hope this helps you

square root of 2x (2^2+6^4)

square root of 2x (2^2+2^4.3^4)

square root of 2x (2^2 (1+2^2.3^4))

square root of 2x (4.325)

square root of 2x. 1300

1300.square root of 2x

3 0

4 years ago