3 years ago

Find the formula for the geometric sequence 4, 20, 100, 500, ...

Mathematics

1 answer:

suter [353]3 years ago

3 0

Answer:

2500

Step-by-step explanation:

it is a geometric progression

r=5

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Which of the following is an extraneous solution of the square root of -3x-2=x+2

yarga [219]

Answer:

x=-6 is an extraneous solution

Step-by-step explanation:

we have

$\sqrt{-3x-2} =x+2$

squared both sides

$-3x-2=(x+2)^2$

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

$x^2+7x+6=0$

solve the quadratic equation by graphing

The solution is x=-6 and x=-1

see the attached figure

<u><em>Verify each solution</em></u>

substitute the value of x in the original expression

For x=-6

$\sqrt{-3(-6)-2} =-6+2$

$\sqrt{16} =-4$

$4=-4$ ----> is not true

Is an extraneous solution

For x=-1

$\sqrt{-3(-1)-2} =-1+2$

$\sqrt{1} =1$

$1=1$ ----> is true

Is the solution

4 0

3 years ago

I need help on this

love history [14]

Answer:

-11/4

Step-by-step explanation:

(-8 - 3)/[3-(-1)]= -11/4

5 0

3 years ago

1. The area of a circle is 60 square units. What is the area of ...

AVprozaik [17]

Multiply the area of the circle by the percentage:

60 square units x 50% = 60 x 0.50 = 30

50% 0f the circle id 30 square units.

3 0

2 years ago

Point 6,8 lies in which quadrant

OverLord2011 [107]

Answer:

Quadrant one if its positive (6, 8)

3 0

2 years ago

Susan was given the math problem x - 4 + -11. She found the answer to be 7. Critique her answer. Is she correct? How do you know

Dmitrij [34]

Answer:

she was wrong

Step-by-step explanation:

x-4-11 = 0 (4+-1=4-1)

x=15

hence she was wrong

3 0

3 years ago

Read 2 more answers