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3 years ago

Someone please help me

Mathematics

1 answer:

DanielleElmas [232]3 years ago

4 0

Answer:

Correct Work

5(x+9) - 3x +4

5x+ 45- 3x+ 4

5x-3x +45+4

2x+49

Mistake made:

The student didn't grouped/combined the like terms first
3x was supposed to be subtracted from 5x

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Graph f(x)=2x and g(x)=2^x on the same coordinate plane. What is the solution to the equation f(x)=g(x) ? Enter your answer in t

Serjik [45]

Answer:

$(1,2)\:\:and\:\:(2,4)$

Step-by-step explanation:

The graph of the two functions are shown on the same diagram in the attachment above;

The solution to the equation $f(x)=g(x)$ is where the two graphs intersected.

These points are

$(1,2)\:\:and\:\:(2,4)$

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3 years ago

PLEASE HELP ASAP

maria [59]

Answer:

First option: $3x^2-5x=-8$

Second option: $2x^2=6x-5$

Fourth option: $-x^2-10x=34$

Step-by-step explanation:

Rewrite each equation in the form $ax^2+bx+c=0$ and then use the Discriminant formula for each equation. This is:

$D=b^2-4ac$

1) For $3x^2-5x=-8$ :

$3x^2-5x+8=0$

Then:

$D=(-5)^2-4(3)(8)=-71$

Since $D$ this equation has no real solutions, but has two complex solutions.

2) For $2x^2=6x-5$ :

$2x^2-6x+5=0$

Then:

$D=(-6)^2-4(2)(5)=-4$

Since $D$ this equation has no real solutions, but has two complex solutions.

3) For $12x=9x^2+4$ :

$9x^2-12x+4=0$

Then:

$D=(-12)^2-4(9)(4)=0$

Since $D=0$ this equation has one real solution.

4) For $-x^2-10x=34$ :

$-x^2-10x-34=0$

Then:

$D=(-10)^2-4(-1)(-34)=-36$

Since $D$ , this equation has no real solutions, but has two complex solutions.

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4 years ago

What your expect to gen.math subject

sveta [45]

Can you elaborate on ur question

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