v=πr^2(r+7) in my opinion is the correct expression
d) You have a <u>difference of squares</u>:
49y² - 9 = (7y)² - 3²
Recall the identity,
a² - b² = (a - b) (a + b)
So,
49y² - 9 = (7y - 3) (7y + 3)
e) Pull out the common factor 3 from each term:
3x² - 3x - 90 = 3 (x² - x - 30)
Now use the <u>sum-product method</u>. Notice that we can write 30 = 5 • 6, and 5 - 6 = 1, so
3x² - 3x - 90 = 3 (x + 5) (x - 6)
f) Same as in (e), use the <u>sum-product method</u>. Notice that 42 = 7 • 6, and -7 - 6 = -13, so
x² - 13x + 42 = (x - 7) (x - 6)
It's 2 7/12
Hope this helped!
A^-b = 1/a^b
a^b / a^c = a^b-c
a^c / b^c =(a/b)^c
Answer:
$125.00
Step-by-step explanation:
$185.50 x 2 + $4.00 =
$371 + $4.00 =
$375 =
so $375 ÷ 3 = $125.00
So Rayne sell each desk for $125.00
