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Snowcat [4.5K]
2 years ago
8

Help me so confused on the question b and c. What the teacher told me was different

Mathematics
1 answer:
nekit [7.7K]2 years ago
8 0
B) 60-15/4-1=45/3=15 miles per hour
c) 60-30/4-2=30/2=15 miles per hour
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Solve this system of equations using the substitution method. If the system of equations
sleet_krkn [62]

Answer:

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3x+y=5

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Step-by-step explanation:

3 0
3 years ago
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7 0
3 years ago
B is the midpoint of AC and E' is the midpoint of BD. If A(-9,-4), C(-1, 6), and E(-4,-3), find the coordinates of D.
Ipatiy [6.2K]
The coordinates for D are (-4, -7)

First we must locate point B as it is vital to finding the midpoint of BD. To do this, we take the average of the endpoints AC since B is its midpoint. 

x values = -9 + 1 = -8
Then divide by 2 for the average -8/2 = -4

y values = -4 + 6 = 2
Then divide by 2 for the average 2/2 = 1

Therefore B must be (-4, 1)

Now we know the values of E must be the average of B and D. So we can write equations for each coordinate since we know they are averages. 

x - values = (Bx + Dx)/2 = Ex
(-4 + Dx)/2 = -4 ---> multiply both sides by 2
-4 + Dx = -8 ---> add -4 to both sides
Dx = -4

y - values = (By + Dy)/2 = Ey
(1 + Dy)/2 = -3 ---> multiply both sides by 2
1 + Dy = -6 ---> subtract 1 from both side
Dy = -7

So the coordinates for D must be (-4, -7)
5 0
3 years ago
Read 2 more answers
(-4)= ? a. -4 B. 4 C.0 d. none above
Anit [1.1K]
If it’s just (-4) with nothing in front the answer is -4
3 0
2 years ago
Plz help i really do need help
Maslowich

Answer:

it just says PDF won't let me download I. sorry

6 0
3 years ago
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