I need help on 11 please

Mathematics

1 answer:

Alisiya [41]2 years ago

5 0

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Question 11 :

the equations are :

$- 2x - 3y = 9$

$4x + 6y = - 18$

now, let's graph the lines ~

As you can see in the attachment, The lines coincides each other, so the equations are :

consistent and dependent

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How do you solve this

lys-0071 [83]

2x^2 + 14x = -12

Step 1: Subtract -12 from both sides.

2x^2 + 14x - (-12) = -12 - (-12)

2x^2 + 14x + 12 = 0

Step 2: Factor the left side of the equation.

2(x + 1)(x + 6) = 0

Step 3: Set Factors equal to 0.

x + 1 = 0 or x + 6 = 0

x = -1 or x = -6

Answer:
x = -1 or x = -6

Hope this helps. : )

5 0

3 years ago

from the top of an 800 foot tall car talk tower, tom sees a plane; the angle of elevation is 67 degrees. at the same instant tay

AlekseyPX

Answer:

Height of plane = 25971.7 meters

Step-by-step explanation:

let H =height of plane

Let x = distance ray to the point under the plane

800 foot = 245meters

1 mile = 1609meters.

Tan 81 = $\frac{H}{1609+x}$ -----------------------(1)