Which statement best explains why earth’s outer core is in liquid form? the iron-nickel alloy melts due to hot temperatures. the outer core has a tarry consistency. this region is less dense when compared to the mantle. this region is under extreme pressure from the weight of other layers.

 The iron-nickel alloy melts due to hot temperatures.

Explanation:

Earth's outer core is composed of  fluid layer that is about 2400 km thick and primarily composed of iron and nickel alloy. It lies above the solid inner core and below the mantle. The core of the earth is like a furnace. It exhibit intense heat and pressure which keeps the iron-nickel alloy in the molten state in the core region.

complete the square on the right side of the equation;

-5(x + 0)^2 + 15

answer: d. y = -x^2 + 15

the answer is; comparing the frequency of collisions with and without the device

this makes the anti-collision system an independent variable and the collisions a dependent variable. if there are fewer collisions with an anti-collision system that without, then it can be stated that the system is a success. essentially, collisions under an anti-collision system are compared with the frequency of collisions by cars with the human drivers.