Answer:
7.83 km/h
Step-by-step explanation:
Let v = average speed for first part, v' = average speed for second part.
Given that v' = v - 15, the distance covered by the first part d = 350 km. The distance covered in the second part d' = 470 km - 350 km = 120 km.
Since both parts are covered in the same time,
d = vt and d' = v't = (v - 15)t
So, 350 = vt (1) and 120 = vt - 15t (2)
substituting vt = 350 into (2), we have
120 = 350 - 15t
collecting like terms, we have
15t = 350 - 120
simplifying, we have
15t = 230
dividing through by 15, we have
t = 230/15
t = 15.33 h
Since d' = v't, then
v' = d'/t
= 120 km/15.33 h
= 7.83 km/h
So, the average speed for the second part of the journey is 7.83 km/h
The statement that we can make that must be true about the sides of ΔDEF is: EF > DE > DF.
<h3>Triangle Sides and angles Relationship</h3>
- The length of the three sides of a triangle is relative to the measure of the size of the angle opposite to each of he sides.
- That is, the longest side will be directly opposite the largest angle and vice versa.
Thus, the statements about the sides of ΔDEF are missing, however, we can make the following deductions:
- m∠D = 103° is opposite to the longest side EF.
- m∠F = 63° (180 - 103 - 14) is opposite to the medium side DE
- m∠E = 14° is opposite to the shortest side DF.
Therefore, the statement that we can make that must be true about the sides of ΔDEF is: EF > DE > DF.
Learn more about the relationship between sides and angles of a triangle on:
brainly.com/question/10695554
Step 4: Divide both sides by -13.<span><span><span>−<span>13w</span></span><span>−13</span></span>=<span>26<span>−13</span></span></span><span>w=<span>−2</span></span>Answer:<span>w=<span>−2</span></span>
X-intercept (along horizontal axis m) = (−5,0)
<span>y-intercept (along vertical axis h) = (0,100) </span>
<span>Plot these 2 points, then draw a line that passes through them </span>
<span>x-intercept represents time when kite was on the ground, immediately before being launched (5 minutes before start of competition) </span>
<span>y-intercept represents height of kite at start of competition (100 ft) </span>