Hi there, the reciprocal of -3/7 is 7/3. Explanation: Okay so, reciprocal means you flip the fractions, and the opposite of negative is positive, so we flip 3/7 and make it 7/3 and take of the negative sign

3 0

3 years ago

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Jada walks up to a tank of water that can hold up to 10 gallons. When it is active, a drain empties water from the tank at a con

Arte-miy333 [17]

Answer:

4.5 minutes

Step-by-step explanation:

At time zero the level was 7 gallons and at time 3 min, the level was 5 gallons.

Take two points:

(0, 7) and (3, 5)

Find the rate of change:

m = (5 - 7)/3 = 2/3

This is a 2 gallons per 3 minutes

Tank holds 10 gallons, it was emptied by 3 gallons and it took:

3 : (2/3) = 3* 3/2 = 4.5 minutes

6 0

2 years ago

a car covers a distance of 490 km with a speed of 70km and then covers a speed of 90km calculate its average speed

DaniilM [7]

Average speed = total distance divided by total time.

In the first part, the car covered 490 km in 7 hours, but I think you mistyped the second part (“then covers a speed of 90km”) and a critical piece is missing to find the total distance and time.

3 0

3 years ago