Tourists covered 255 km for a 4-hour ride by car and a 7-hour ride by train. What is the speed of the train, if it is 5 km/h gre
1 answer:
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Answer:
P = 0.5Q - 20
Step-by-step explanation:
P = kQ + c
substitute Q = 60 , P = 10 into the equation
10 = 60k + c → (1)
substitute Q = 240, P = 100 into the equation
100 = 240k + c → (2)
subtract (1) from (2) term by term to eliminate c
90 = 180k ( divide both sides by 180 )
=
= 0.5 = k
substitute k = 0.5 into (1) and solve for c
10 = 60(0.5) + c
10 = 30 + c ( subtract 30 from both sides )
- 20 = c
then
P = 0.5Q - 20
<span>1. Evaluate (2-2^3)^3-4x(-4)
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</span>
<span>
2. Compute
-453+(-5.34)=-453-5.34
=-458.34
-56+27.4=-28.6
3. Use <, >, or =
9 > -8
-12 < -3
-4 > -7</span>
</span>
</span>
2. Compute
-453+(-5.34)=-453-5.34
=-458.34
-56+27.4=-28.6
3. Use <, >, or =
9 > -8
-12 < -3
-4 > -7</span>