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forsale [732]
3 years ago
12

(HELP FAST PLEASE) g^2-9 Factor each expression. Show your work

Mathematics
1 answer:
vovangra [49]3 years ago
5 0

Answer:

(g+3)(g-3)

Step-by-step explanation:

square root of g squared is g

square root of 9 is 3

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Find the value of x that makes A || B.
jarptica [38.1K]

Answer:

x = 20

Step-by-step explanation:

3x - 10 = x + 30

2x = 40

x = 20

6 0
3 years ago
How many years will it take for $20,000 to earn $7,000 in interest if placed in an account that earns 2.09% simple interest?
aalyn [17]

Answer:

16.7 years

Step-by-step explanation:

7 0
2 years ago
What have I done wrong and where please help me
lys-0071 [83]
12x - 18 - 4x -2
12x - 4x = 8x (yours 12x - 4x = 8)
-18 - 2 = -20 (yours -18 -1 = 17)

answer:

8x - 20
6 0
3 years ago
Find equations of the tangent plane and the normal line to the given surface at the specified point. x + y + z = 8exyz, (0, 0, 8
Dima020 [189]

Let f(x,y,z)=x+y+z-8e^{xyz}. The tangent plane to the surface at (0, 0, 8) is

\nabla f(0,0,8)\cdot(x,y,z-8)=0

The gradient is

\nabla f(x,y,z)=\left(1-8yze^{xyz},1-8xze^{xyz},1-8xye^{xyz}\right)

so the tangent plane's equation is

(1,1,1)\cdot(x,y,z-8)=0\implies x+y+(z-8)=0\implies x+y+z=8

The normal vector to the plane at (0, 0, 8) is the same as the gradient of the surface at this point, (1, 1, 1). We can get all points along the line containing this vector by scaling the vector by t, then ensure it passes through (0, 0, 8) by translating the line so that it does. Then the line has parametric equation

(1,1,1)t+(0,0,8)=(t,t,t+8)

or x(t)=t, y(t)=t, and z(t)=t+8.

(See the attached plot; the given surface is orange, (0, 0, 8) is the black point, the tangent plane is blue, and the red line is the normal at this point)

4 0
3 years ago
Is x = 1 a solution of the equation 2 – 8x = –6?
borishaifa [10]

Let's verify by substituting 1 to x.

2 - 8x = -6

2 - 8(1) = -6

2 - 8 = -6

-6 = -6

It is equal, therefore x = 1 is the solution.

4 0
3 years ago
Read 2 more answers
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