Simplify 7 + (−3). (1 point)

a
−10

b
−4

c
4

d
10

C. 4

Step-by-step explanation:

To simplify this expression remember that adding a negative number is the same as subtracting it. So a+(-b)=a-b, this means 7+(-3)=7-3. 7-3 is 4, so C is correct.

70

step-by-step explanation:

2*5=10

4*15=60

60+10=

70

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.