4 years ago

Plz help. Thank you!

Mathematics

1 answer:

NARA [144]4 years ago

3 0

The new surface area will be 9 times the old surface area.

So A or #1

You might be interested in

show that thw roots of the equation (x-a)(x_b)=k^2 are always real if a,b and k are real. Please I really need help with this

VLD [36.1K]

Answer:

see explanation

Step-by-step explanation:

Check the value of the discriminant

Δ = b² - 4ac

• If b² - 4ac > 0 then roots are real

• If b² - 4ac = 0 roots are real and equal

• If b² - 4ac < 0 then roots are not real

given (x - a)(x - b) = k² ( expand factors )

x² - bx - ax - k² = 0 ( in standard form )

x² + x(- a - b) - k² = 0

with a = 1, b = (- a - b), c = -k²

b² - 4ac = (- a - b)² + 4k²

For a, b, k ∈ R then (- a - b)² ≥ 0 and 4k² ≥ 0

Hence roots of the equation are always real for a, b, k ∈ R

8 0

3 years ago

Find each sum simplify if possible

padilas [110]

3/5
This will help you

8 0

3 years ago

Read 2 more answers

Order the numbers from least to greatest.<br><br> −34, 0.5, 23,−73, 1.2

dybincka [34]

Answer:

0.5,1.2,23,-34,-73

Step-by-step explanation:

8 0

4 years ago

Read 2 more answers

What forms do the equations of motion for an idealized string take if either (a) the linear density varies with position, or (b)

stepan [7]

Answer:

a) the varying densities are to be considered with respect to position

Step-by-step explanation:

the complete answer is found in the attachment

7 0

3 years ago

3a+5b-9: a=2, b=3 that is my question I need help

Zigmanuir [339]

Answer:

Step-by-step explanation:

7 0

3 years ago

Read 2 more answers