Answer:
)x + 5)(x - 5)
Step-by-step explanation:
x² - 25 ← is a difference of squares and factors in general as
a² - b² = (a + b)(a - b), thus
x² - 25 = x² - 5² = (x + 5)(x - 5)
Setup
0.8x + 0.4y = 50
0.1x + 0.2y = 10 - Multiply by -2 and add
get
0.6x = 30
x = 50 mg compound A
.1 (50) + .2y = 10
5 + .2y = 10
.2y = 5
y = 25 mg compound B
Answer:
62
Step-by-step explanation:
90 - 28
complementary angles equal to 90
Answer:
C
Step-by-step explanation:
it does not have any variables and it does not have an equal sign, so it is an expression
I think the first one is 1/200 and the second is 1/125
