Conjecture: if 2(x^2 + 5) = 60, then x is 5 or –5.

1: 2(x^2 + 5) = 60
2: 2x^2 + 10 = 60
3: 2x^2 = 50
4: x^2 = 25
5: x = ±5

. will give brainliest

. given

2. distributive property

3. subtraction property of equality

4. division property of equality

5. square root property of equality

Step-by-step explanation:

18.8 cubic inches.

step-by-step explanation:

volume of a cone = πr²h

r = 1.5 inches

h = 8 inches

pi = 3.14

volume of our cone = × 3.14 × 1.5² × 8 = 18.84 square inches

or equals to 18.8 square inches rounded up to nearest tenth.