Find the surface area of each pyramid. Round to the nearest tenth if necessary. triangular pyramid: base side lengths, 4.5 yds; base height: 3.9 yds; slant height, 10.2 yd

Group of answer choices

86.4 yd2

58.2 yd2

146.5 yd2

77.6 yd2

Step-by-step explanation:

a4 - 3a2 - 1

step-by-step explanation:

step   1   :

equation at the end of step   1   :

  ((a4) -   3a2) -   1

step   2   :

trying to factor by splitting the middle term

2.1     factoring   a4-3a2-1  

the first term is,   a4   its coefficient is   1 .

the middle term is,   -3a2   its coefficient is   -3 .

the last term, "the constant", is   -1  

-2x + 7 = 7

subtract 7 from both sides.

-2x = 0

divide both sides by -2.

x = 0