It is c because i believe so
Time = Distance / Speed OR Distance = Time * Speed OR Speed = Time * Distance
Since both cars travelled the same distance; it is safe to have this formula to get the actual distance travelled.
Let X = distance in MPH
Car A = Car B
4 hours * X = 4.5 hrs * (X - 5MPH)
4X = 4.5(X-5)
4X = 4.5X - 22.50
4X - 4.5X = -22.50
-0.5X = -22.50
X = -22.50 / -0.5
X = 45 MPH
Speed of Car B = 4.5 hrs * (45-5)
= 202.50 - 22.50
Speed of Car B = 180 MPH
TO CHECK
Speed of Car A = 4hrs * 45 MPH
Speed of Car A = 180 MPH
Answer:
(- 2, - 4 ) and (3, 10 )
Step-by-step explanation:
(2)
Given the 2 equations
4x - 7y = 20 → (1)
x - 3y = 10 → (2)
Rearrange (2) expressing x in terms of y, that is
x = 10 + 3y → (3)
Substitute x = 10 + 3y into (1)
4(10 + 3y) - 7y = 20 ← distribute and simplify left side
40 + 12y - 7y = 20
40 + 5y = 20 ( subtract 40 from both sides )
5y = - 20 ( divide both sides by 5 )
y = - 4
Substitute y = - 4 into (3) for corresponding value of x
x = 10 + 3(- 4) = 10 - 12 = - 2
Solution is (- 2, - 4 )
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(3)
3x + y = 19 → (1)
4x - y = 2 → (2)
Adding the 2 equations term by term will eliminate the y- term
(4x + 3x) + (- y + y) = 19 + 2, that is
7x = 21 ( divide both sides by 7 )
x = 3
Substitute x = 3 into either of the 2 equations and solve for y
Substituting into (1)
3(3) + y = 19
9 + y = 19 ( subtract 9 from both sides )
y = 10
Solution is (3, 10 )
Hi there! Your answer will be 5.26. If your teacher is looking for the other numbers following, the full answer would be 5.26315789475.
Step-by-step explanation:
First, you want to divide 3 and 2.85 and you will get 1.05263157895.
Then, you want to multiply that long number by 5 (since 8-3 is 5 representing the quarts).
Hope this helps! Have a good day!!
The answer is C. 55
You get your answer by adding together the degrees of the angles you know 55+70
That equals 125 degrees and subtract that from 180 degrees
180-125= 55