Using rote learning with more advanced subjects is generally that students can immediately forget the facts they have learned after the tests, and might not fully understand the concepts to begin with.
D should be correct
Sorry if it’s wrong
(x+5)(x-5)
= x^2 - 5x + 5x - 25
= x^2 - 25
(5x+3)(5x-3)
= 25x^2 - 15x + 15x - 9
= 25x^2 - 9
do you see the pattern? both the coefficient on x and constant multiply together to make a perfect square and the middle term, also known as "b" term cancels out leaving a binomial
Answer:
-3.5
Step-by-step explanation:
2x+21/2=x+7
2x + 10.5 = x + 7
-x -x
x + 10.5 = 7
-10.5 -10.5
x = -3.5
Answer:
cosine 71 = adjacent / hypotenuse = 6.3 / BC
0.32557 = 6.3 / hypotenuse
hypotenuse = 6.3 / 0.32557
hypotenuse = 19.351
hypotenuse = 19.4 (to 3 significant figures)
Step-by-step explanation:
