Y-8=1/2(x+12)
it is plus twelve because if you have the minus already there, with a negative it turns positive
Answer:
If I'm reading the graph correctly, the temperature at 0 kilometers is 40. The correct statement is "as the height increases, the temperature decreases." This is shown by the line that's going down instead of up. The temperature is decreasing by -5 per kilometer.
If I'm wrong, feel free to correct me. :)
Answer:
(5, )
Step-by-step explanation:
Given the 2 equations
5x + 7y = 40 → (1)
3x - 7y = 0 → (2)
Adding the 2 equations term by term will eliminate the y- term
8x + 0 = 40
8x = 40 ( divide both sides by 8 )
x = 5
Substitute x = 5 into either of the 2 equations and solve for y
Substituting into (1)
5(5) + 7y = 40
25 + 7y = 40 ( subtract 25 from both sides )
7y = 15 ( divide both sides by 7 )
y =
solution is (5, )
Use the quadratic formula to find the solutions.<span><span><span>−b±<span>√<span><span>b2</span>−4<span>(ac)</span></span></span></span><span>2a</span></span><span><span>-b±<span><span>b2</span>-4<span>(ac)</span></span></span><span>2a</span></span></span>Substitute the values <span><span>a=−1</span><span>a=-1</span></span>, <span><span>b=0</span><span>b=0</span></span>, and <span><span>c=40</span><span>c=40</span></span> into the quadratic formula and solve for <span>xx</span>.<span><span><span>0±<span>√<span><span>02</span>−4⋅<span>(−1⋅40)</span></span></span></span><span>2⋅−1</span></span><span><span>0±<span><span>02</span>-4⋅<span>(-1⋅40)</span></span></span><span>2⋅-1</span></span></span>Simplify.Tap for fewer steps...Simplify the numerator.Tap for more steps...<span><span>x=<span><span>0±4<span>√10</span></span><span>2⋅−1</span></span></span><span>x=<span><span>0±410</span><span>2⋅-1</span></span></span></span>Simplify the denominator.Tap for more steps...<span><span>x=<span><span>0±4<span>√10</span></span><span>−2</span></span></span><span>x=<span><span>0±410</span><span>-2</span></span></span></span>Simplify <span><span><span>0±4<span>√10</span></span><span>−2</span></span><span><span>0±410</span><span>-2</span></span></span>.<span><span>x=±2<span>√10</span></span><span>x=±210</span></span>The result can be shown in both exact and approximate form.<span><span>x=±2<span>√10</span></span><span>x=±210</span></span><span>x≈6.324555,−<span>6.324555</span></span>