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3 years ago

PLEASE ITS MY LAST QUESTION (ITS MULTIPLE CHOICE)

Mathematics

2 answers:

Ainat [17]3 years ago

5 0

Answer:

except third all are correct answer

Step-by-step explanation:

please give me brainlest

marshall27 [118]3 years ago

4 0

OK I GOT U so you have multiply the outside with the inside so 2(18k +21)-9 that would be the same thing as 2*18k=36k and 21*2= 42 so that’s 36k + 42 -9 YOU CAN ONLY ADD 42 and -9 because 36k and 42 go together like gummy bears and Mayo… they don’t go together… so only add things that you know how to add because I assume u didn’t already know how to add 36k and 42 because no one came because it’s not possible. Hopefully this helps :)

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A (5,3) and B(3,-2) are two fixed points. Find the equation of the locus of P, so that the

andre [41]

Answer:

$37=5x-2y,\,1=5x-2y$

Step-by-step explanation:

If $(x_1,y_1),\,(x_2,y_2),\,(x_3,y_3)$ are coordinates of a triangle then area of a triangle is equal to $\frac{1}{2}|x_1(y_2-y_3)+x_2(y_3-y_1)+x_3(y_1-y_2)|$

Let point P be $(x,y)$

Put $(x_1,y_1)=(5,3),\,(x_2,y_2)=(3,-2),\,(x_3,y_3)=(x,y)$

Area of a triangle = $\frac{1}{2}|5(-2-y)+3(y-3)+x(3+2)|$

$=\frac{1}{2}|-10-5y+3y-9+5x|\\\\=\frac{1}{2}|-19+5x-2y|$

Also,

Area of a triangle = 9 square units

$9=\frac{1}{2}|-19+5x-2y|\\\\18=|-19+5x-2y|$

±18 = -19 + 5x - 2y

$18=-19+5x-2y,\,-18=-19+5x-2y\\\\37=5x-2y,\,1=5x-2y$

3 0

3 years ago

PLEEAAAASE help <br> if a+1 is divisible by 3 prove that 4+7a is divisible by 3 too

Lemur [1.5K]

Answer:

Given a is 5

Step-by-step explanation:

I. Given a is 5

= a + 1

= 5 + 1

= 6

6 is divisible by 3 => true

II. Find 4 + 7a value

= 4 + 7(5)

= 4 + 35

= 39

39 is divisible by 3 => true

III. Prove by

6 ÷ 3 = 3

39 ÷ 3 = 13

Hope that help :)

3 0

3 years ago

I need help, on 1-3 and with the chart

motikmotik

1. you do 7×---=21 next you do not what the answer was to 7×---=21 times 3
2. go back to 1.( what you did to 1. )
3. go back to 1. ( what you did to 1.)

6 0

4 years ago

Read 2 more answers

What is limit of (x cubed 3 x squared 4 x minus 12) as x approaches negative 3? –78 –24 30 54

Sergio039 [100]

The limit of the expression as x approaches -3 is -24

<h3>How to determine the limit of the expression?</h3>

The expression is given as:

$x^3 + 3x^2 + 4x - 12$