Answer:
The side of square A is 30 cm.
Step-by-step explanation:
Given that,
The dimensions of square A are three times the dimensions of square B.
The area of square A is 900 sq cm.
Side of square A = 3( side of square B)
Let the side of square B is b. So,
Side of square A, a = 3b
We know that, the area of square is side². So,
Side of square A, a = 3(10) = 30 cm
Hence, the side of square A is 30 cm.
Answer:
(5x²+3)(2x-7)
Step-by-step explanation:
As stated, this is a factor by grouping question: a(x+y)+b(x+y)=(x+y)(a+b)
10x³-35x²+6x-21
first, look for common factors.
-35x² and -21 have the common factor of -7
10x³and 6x have the common factor of 2x
now, rearrange the polynomial
10x³+6x-35x²-21
factor 2x out of 10x³+6x
2x(5x²+3)
factor -7 out of -35x² and -21
-7(5x²+3)
Now, the polynomial is 2x(5x²+3)-7(5x²+3)
(5x²+3) is common in both parts, so factor that out, 2x-7 would be another expression as that is left.
now, the expression is
(5x²+3)(2x-7)
Hope this helps!
Answer:
$6.39
Step-by-step explanation
well, 20% of $30 is $6, so then you just have to add on the tax, which is 39 cents, coming to $6.39