Answer:35
Step-by-step explanation:
if you added 85,70, and 50 you would get 205 and that is more than the number of students that were interviewed so 35 would be the correct answer
Answer:
Step-by-step explanation:
new dimensions of prism: x by (x+4) by (2x).
volume = x(x+4)(2x) = 2x³ + 8x²
2x³ + 8x² = 450
2x³ + 8x² - 450 = 0
x³ + 4x² - 225 = 0
x = 5 in
Answer:

Step-by-step explanation:
Going by the dimensions of the given three-dimensional figure, we can conclude that the figure is that of a cube. The height, length and width are equal.
Volume of a cube is given as
, while surface area of a cube is given as 
Where, a = the side length = 5 yards


Answer:
C
Step-by-step explanation:
4(3x+5) = 12x+20
Answer:
No real roots
Step-by-step explanation:
Given
7x² + 5x + 1 = 0 ← in standard form
with a = 7, b = 5, c = 1
To determine the nature of the roots use the discriminant
Δ = b² - 4ac
• If b² - 4ac > 0 then roots are real and distinct
• If b² - 4ac = 0 then roots are real and equal
• If b² - 4ac < 0 then the roots are not real
Here
b² - 4ac = 5² - (4 × 7 × 1) = 25 - 28 = - 3
Thus the 2 roots are not real