Answer:
see explanation
see explanationStep-by-step explanation:
21
Note that
(a - )²
= a² - 2 +
= a² + - 2
= 11 - 2
= 9
Thus
(a - )² = 9 ( take the square root of both sides )
a - = 3
22
Since the expression is a perfect square, then
(4x + 5y)²
= 16x² + 40xy + 25y²
Comparing coefficients, then
a - 1 = 40 ( add 1 to both sides )
a = 41
23
99² - 87² ← is a difference of squares and factors as
= (99 - 87)(99 + 87)
= 12 × 186 = 1152, thus
24a = 1152 ( divide both sides by 24 )
a = 48
Answer:
$32.55
Step-by-step explanation:
93 * .35 = 32.55
Answer:
you really think anyone cares?
Step-by-step explanation:
Step 1- s t o p b e i n g a t r u m p i e
Answer:
a)
(x,y)
(-2,-3),(-1,0),(1,-4),(2,-3),(3,0),(4,3)
b) A
c) -1.75
just substitute the number in.
d) quadratic formula used
x=3.2
x= -1.2
Step-by-step explanation: