Evaluate:

Use j = -9 and k = 4

so the way that you would have to solve this is to first do -9*4 which is -36 so then you subtract that from 4 which gives you your answer of:

-40

Hope this helps bye!

Step-by-step explanation:

Hey there!

4 - jk

= 4 - (-9)(4)

= 4 - (-36)

= 4 + 36

= 40

40

Good luck on your assignment and enjoy your day!

~Amphitrite1040:)

correct answer:

b.(19,-2)

step-by-step explanation:

one of the most important purposes of surface treatment is to alter surface properties according to the requirement of specific applications. for example, hydrophobic coating has been utilized on windshield and eyeglasses. gold atom monolayer on substrate has become a popular surface bioconjugation strategy.