Answer:
7x+21y=5439
x+y=305
Step-by-step explanation:
it's pretty self explanatory, right?
Answer:
The answer is 9.43 cm.
Step-by-step explanation:
The formula for circumference is πd or 2πr.
The diameter is the radius times 2. 1.5 times 2 is 3.
3 times π is about 9.43.
I hope this helps! :)
Answer:
∪ means the whole numbers which is found in them
B and C have the numbers, 3,7, 6, 9, 2, 5
so, B∪C={2, 3, 5, 6, 7, 9)
Step-by-step explanation:
can i have brainliest if it helped : )
Answer:
x^2 - 64
Step-by-step explanation:
A difference of squares is a special product in the form (a^2 - b^2)..their factored form is (a - b)(a + b)..
Thus here a = x and b = 8, thus if x + 8 is a factor, then x - 8 is also a factor..
(x + 8)(x - 8) <-- expand this out using difference of squares rules..
= (x)^2 - (8)^2
= x^2 - 64 <-- answer...
You could also expand that using FOIL (FOIL - first, outer, inner, last)..
(x + 8)(x - 8)
= (x)(x) + (x)(-8) + (8)(x) + (8)(-8)
= x^2 - 8x + 8x - 64 <-- the -8x and 8x cancels out..leaving you with..
= x^2 - 64
9.7 x 10^3
It is the same as 3600 + 6100 = 9700 => 9.7 X 10^3
