Evaluate:
NI
9
64
O A.
3
64
O B.
9
64

$Please please help Evaluate: NI 9 64 O A. 3 64 O B. 9 64$

## This Post Has 12 Comments

1. Expert says:

Set up a system of equations

2. fireman59937 says:

Step-by-step explanation:

3. likevlad2014 says:

256

Step-by-step explanation:

64(15-1x2-9)

64(15-2-9)

64 x 4

256

4. Expert says:

54.864 meters

step-by-step explanation:

5. petriajack8375 says:

no

Step-by-step explanation:

6. alyahmarie00 says:

7. smithmariah7426 says:

12

Step-by-step explanation:

3

9

(100−64)

=12

8. damyonfenton13 says:

it's b hope i help please vote brainliest

9. whitakers87 says:

The correct option is D) -9/16

Therefore the final expression when X is equal to -1 and Y is equal to 4 is

$9x^{-5}y^{-2}=-\dfrac{9}{16}$

Step-by-step explanation:

Given:

$9x^{-5}y^{-2}$

Evaluate when x = -1 and y = 4

Solution:

When x = -1 and y = 4 we hane

$9x^{-5}y^{-2}=9(-1)^{-5}(4)^{-2}$

Identity we have

$x^{-a}=\dfrac{1}{x^{a}}$

As we know  minus sign multiplied by odd number of times the number is multiplied and the assign remain same that is minus. Therefore,

$(-1)^{5}=-1\times -1\times -1\times -1\times -1\\(-1)^{5}=-1$

Now using the above identity we get

$9x^{-5}y^{-2}=\dfrac{9}{(-1)^{5}}\times \dfrac{1}{(4)^{2}}$

$9x^{-5}y^{-2}=\dfrac{9}{-1}\times\dfrac{1}{16}$

$9x^{-5}y^{-2}=-\dfrac{9}{16}$

Therefore the final expression when X is equal to -1 and Y is equal to 4 is

$9x^{-5}y^{-2}=-\dfrac{9}{16}$

10. beverlyamya says:

a

c

b

y

have to go back and forth with him to make him happy for his family as a friend of ours to 5.2 the world of our family lives and lives

11. etuck16 says:

b=64 96/149

Step-by-step explanation:

12. dalton200166 says:

To evaluate x divided by 80 for x=8/9, we would first need to look at them in the same form. So, x divided by 80 would look like x/80 We would then substitute 8/9 for x, which would give us: (8/9)/80 or 8/9 ÷ 80/1 When fractions are divided by other fractions we can understand them as multiplication problems with the denominator inverted. Which in this case would be: 8/9 * 1/80 From there, we multiply the numerators and denominators. That gives us 8/720. We can then reduce that to: 1/90