The equatient of a number and -4 is -9 " seven subtracted from a number is -18' The six people went out to dinner split the check and each paid $18. How much was the check?

Water boils at 212 degrees fahrenheit. If a pot of water is 145 degrees, find the change in temperature needed for the water to boil.

113.42

i hope that is right.

step-by-step explanation:

18 units²

step-by-step explanation:

first let's find altitude bd using the distance formula

d = √((y₂ - y₁)² + (x₂ - x₁)²)

bd = √((0 - -3)² + (0 - 3)²)

bd = √18

given the placement of points a and c, we can denote that point d bisects segment ac.

we will call ac the base.

using the distance formula

ac = √((0 - 6)² + (-6 - 0)²)

ac = √72

knowing our base and our height, we can plug these into our triangle area formula

area = (b * h)/2

area = (√18 * √72) / 2

area = (√1296) / 2

area = 36 / 2

area = 18 units²