Answer:
8.4
Step-by-step explanation:
0.9c - 2.3d
given c = 17 and d = 3, substitute these into the expression:
0.9c - 2.3d
= 0.9(17) - 2.3(3)
= 15.3 - 6.9
= 8.4
Answer:
The last choice is your answer
Step-by-step explanation:
Plot your point in an x/y coordinate plane. We are in QII where x is negative and y is positive. From that point, if you drop an altitude to the negative x axis, you have a right triangle with a base measure of -2, a height of 5 and a hypotenuse that is unknown as of right now. We will find it using Pythagorean's Theorem. 
The length of the hypotenuse is √29. That means that the cosine of that angle is the side adjacent over the hypotenuse. Rationalizing the denominator gives us 
1.] The boundary between two air masses of different density<span>. When it does not move, it's called "stationary"; "warm" when warmer </span>air<span> replaces cooler </span>air<span>; "cold" when cooler </span>air<span> replaces warmer </span>air<span>. Front: The transition zone </span>between two air masses<span> of... Cold front: </span><span>The boundary between two air masses.
2. </span><span>Continental polar (cP) or continental arctic (cA) </span>air masses<span> are cold, dry, and stable. ... Maritime tropical (mT) </span>air masses<span> are warm, moist, and </span>usually<span> unstable. Some maritime tropical </span>air masses<span> originate in the subtropical Pacific Ocean, where it is warm and </span>air<span> must </span>travel<span> a long distance over water.
3.] </span> <span>When a weather front passes over an area, it is marked by changes in temperature, wind speed and direction, atmospheric pressure, and often a change in the precipitation pattern...
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