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laila [671]
3 years ago
6

Is b = 15 a solution to the equation 4b - 20 = 40?

Mathematics
2 answers:
irina [24]3 years ago
5 0

Answer:

yes

Step-by-step explanation:

4 x 15 - 20 = 40

60 - 20 = 40

fenix001 [56]3 years ago
5 0
Answer: yes

Explanation: 4(15) - 20 = 40
60 - 20 = 40
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3 years ago
Two planes simultaneously left the Washington and LA and headed towards each other. The distance between the cities is 2700 mile
katrin2010 [14]

Answer:

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Speed of the plane from LA: 600\ mph

Step-by-step explanation:

We need to remember that:

d=Vt

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Let be "w" the speed in mph of the plane from Washington and  "l" the speed in mph of the plane from LA.

We know that the distance between the cities is 2700 miles and after they flied for 2 hours, the distance between them was 500 miles. Then we can write the following equation:

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Since the speed of the plan from LA was 100 mph faster, we can write this equation:

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The steps to solve this are:

1. Substitute the Equation 2 into the Equation 1 and solve for "w":

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4 years ago
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Answer:

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Step-by-step explanation:

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