Answer:
It is significant that so much carbon dioxide stays in the atmosphere because, CO2 is the most important gas for controlling Earth's temperature. //Plants breathe in CO2 to give us oxygen.
I think it’s D hope that helped
We first need to write the function in standard form.
y = -x^2 - 7x + 18
To find the axis of symmetry, we do -b/2a
The a and b are the coefficients of the x values.
So a would be -1 since -x is same as -1x
Follow that, b would be -7.
Then just plug the values in. - (-7)/2(-1) = -7/2
The axis of symmetry is -7/2
4 sinx / cosx * cosx
4 tanx / cosx Trig identity tanx = sinx/cosx
Fire is a natural part of the grassland ecosystem and helps maintain its health and vigor. It warms up the soil and reduces the leaf litter that accumulates each year, allowing sunlight to penetrate. ... After a fire, blackened fields quickly revive with new, green grasses and abundant, showy wildflowers.
