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3 years ago

Help me please idk this

Mathematics

1 answer:

jolli1 [7]3 years ago

5 0

Hi there! The answer is D.

To find the perimeter of a triangle we need to add the values of all three of the sides.

We get the following:
Perimeter = 11 + 12 + 4 = 23 + 4 = 27
The answer is D.

~ Hope this helps you!

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3 years ago

Which system is equivalent to<br> y= 9x^2<br> x+y=5<br> ?

melomori [17]

Answer : Option A

Explanation:

we can clearly see that from x+ y=5 we can substitute y = 5-x in y = 9x^2

Option B is clearly incorrect x can not be y -5

Option C is incorrect because y can not be 5 +x

Option D is incorrect because its y = 9x^2 not y^2 =9x^2 so y can not be 3x

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3 years ago

Read 2 more answers

Solve: -3x = 15 you can get the brainiest

kaheart [24]

If you times -3 by -5 the negatives cancel eachother and therefore you get 15.

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3 years ago

Anthony wants to find the value of k for which given points W(0,-2), I(2,0) and L(5,k) are collinear

Bogdan [553]

Given:

The three points are W(0,-2), I(2,0) and L(5,k).

To find:

The value of k for which the given points are collinear.

Solution:

We know that, three points are collinear if the area of the triangle formed by these three points is 0.

$\dfrac{1}{2}|x_1(y_2-y_3)+x_2(y_3-y_1)+x_3(y_1-y_2)|=0$

$x_1(y_2-y_3)+x_2(y_3-y_1)+x_3(y_1-y_2)=0$

The three points are W(0,-2), I(2,0) and L(5,k). So,

$0(0-k)+2(k-(-2))+5(-2-0)=0$

$0+2(k+2)+5(-2)=0$

$2k+4-10=0$

$2k-6=0$

Adding 6 on both sides, we get

$2k=6$

$k=\dfrac{6}{2}$

$k=3$

Therefore, the correct option is E.

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3 years ago

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Arte-miy333 [17]

Answer:

x = 3/2 + y/4

Step-by-step explanation:

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3 years ago