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const2013 [10]
3 years ago
10

Given b= 4 and c= -5, evaluate b2 - c2. 41 -2 -9

Mathematics
1 answer:
irina [24]3 years ago
4 0

Answer:

-9

Step-by-step explanation:

b² - c²

= 4² - (-5)²

= 16 - 25

= -9

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Two trains leave a city at 3 P.M. One train goes east at a constant rate of 70 mph. The other goes west at a rate of 62 mph. How
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Answer:

4 hours

Step-by-step explanation:

The general formula for distance, rate and time is:

d = rt, where distance is the product of rate multiplied by time

Given that one train is moving at a rate of 70 mph and one is moving at a rate of 62 mph in the opposite direction, the combined distance over time is equal to 528 miles.  Using the variable 't' for time:

70t + 62t = 528

Combine like terms: 132t = 528

Divide both sides by 132: 132t/132 = 528/132  or t = 4 hours

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3 years ago
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There is an error in the diagram. Choose the statement that best describes what is wrong.
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Answer:

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Leila works as a tutor for an hour and as a waitress for an hour. This month, she worked a combined total of hours at her two jo
kupik [55]

Answer:

E(t)  =  5t +672     ($)

Step-by-step explanation:     INCOMPLETE QUESTION

FROM GOOGLE

she earns 12 $ per hour as tutor and 7 $ per hour as waitress, this month she worked a combined of 96 hours at her two jobs

Let be t the numbers of hours Leila works as tutor this month

Answer:

If Leila worked t hours as tutor then, she worked (96 - t) hours as waitress

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E(t)  =  12t   +  672 - 7t

E(t)  =  5t +672     ($)

7 0
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What would be the answer to this?
Eddi Din [679]

Answer:

If you are looking for x it equals 80 degrees

Step-by-step explanation:

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