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3 years ago

Please I need a answer fast

Mathematics

1 answer:

Sphinxa [80]3 years ago

3 0

solution

X + k

X - 2k

=X+k-x-2k

=x-x+k-x-2k

=0-k

=-k

or,

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What are the solutions to the equation?

Maru [420]

rearrange the equation to where you set it equal to 0 by moving the 25 over.

n2 - 8n -9 = 0

now factor

(n-9)(n+1)

so n1 = 9

n2 = -1

6 0

3 years ago

Wich of the following functions maps 3 to -5?

kolezko [41]

Answer:

Step-by-step explanation:

Consider all options and find f(3):

Then

Not -5, so this option is false.

Then

This option is true.

Then

Not -5, so this option is false.

Then

Not -5, so this option is false.

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3 years ago

Help Pls! I need this fast!

lesya [120]

Answer: 36

Step-by-step explanation:

$\overline{AB} \cong \overline{BC}$ (Triangle ABC is isosceles)

$m\angle CAB=m\angle CBA=30^{\circ}$ (base angles of an isosceles triangle are congruent)

$\angle MCB=90^{\circ}$ (In triangle CMB, angles in a triangle add to 180 degrees)

$\angle ACM=30^{\circ}$ (triangle sum theorem)

$MB=24$ (30-60-90 triangle CMB)

$AB=12$ (sides opposite congruent angles in a triangle are congruent)

$AB=36$ (segment addition postulate)

3 0

2 years ago

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

Melvin is helping his teachers plan a field trip. There are 255 people going on the field trip and each school bus holds 56 peop

anzhelika [568]

255/56 = 4.55....

You can't have 0.55... buses so you round that up to 1.

Therefore 4+1 = 5 so 5 buses would be the minimum.

5 0

3 years ago

Read 2 more answers