4 years ago

Do understand how to do this at all find the sum

Mathematics

1 answer:

storchak [24]4 years ago

6 0

-9/(mn^2)+m^2/n we make a mn^2 a common denominator...

-9/(mn^2)+(nm^3)/(mn^2)

(nm^3-9)/(mn^2)

You might be interested in

What is the factored form of this expression? x2 − 12x + 36

Setler [38]

I think the answer is (x-6)(x-6)

7 0

3 years ago

Pls help

solong [7]

Ok let’s solve it

5(x-2)^2-20=0

first let’s foil (x-2)

5(x^2-4x+4) -20=0

now distribute the 5

5x^2 -20x +20 -20 = 0

combine like terms

5x^2-20x=0

take the gcf

5x(x-4)=0

x=0, 4

solutions are (4,0) and (2, -20) because the original vertex form a(x-h)^2+k

7 0

3 years ago

14 - 8 + 3 + 8 × [24 ÷ 8}

Kryger [21]

Step-by-step explanation:

14 - 8 + 3 + 8 × [24 ÷ 8}

14 - 8 + 3 + 8 × [3}

14-8+3+24= 33

= 33

3 0

3 years ago

Read 2 more answers

180 is 25% of what number? show ur work

horsena [70]

Since 25% is 1/4, then 180 times 4 is 720.
720 is your answer.

6 0

3 years ago

A hiker in Africa discovers a skull that contains 63% of its original amount of C-14.

tester [92]

Answer:

3820 years

Step-by-step explanation:

The age of the skull can be found using carbon-14 by applying the half-life relationship.

Age of skull is given by;

$t=(\frac{In\frac{N}{N0} }{-0.693} )*5730$

where N=63 N₀=100 -0.693=decay factor of carbon and 5730 =half-life of carbon-14, t =age

substitute values in equation

$t=(\frac{In\frac{63}{100} }{-0.693} )*5730\\\\\\t=(\frac{In0.63}{-0.693} )*5730\\\\\\t=(\frac{ -0.4620}{-0.693} )*5730\\\\\\t=(0.6667)*5730\\\\\\t=3820.29\\\\\\t=3820years$

4 0

4 years ago