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prohojiy [21]
2 years ago
9

Please help I'm really stuck with this

Mathematics
1 answer:
Aneli [31]2 years ago
4 0
3 hours. 
12b + 14a = 78

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John should drive to his workplace and back to home. On the way to the workplace it was raining, so he drove at speed of 42mph.
nataly862011 [7]

Answer:

48 mph

Step-by-step explanation: Add 42mph and 54 mph and you get 96.  To find the average of the two --- divide 96 by 2 and you get 48mph as the average speed for the entire trip.

3 0
3 years ago
$12.75 is what percent of $50?
hammer [34]
$12.75 is 25% of $50
7 0
3 years ago
3^2 + (6 • 4^2)10 - 22
baherus [9]
9+(<span>6•16)10-22
9+(96)10-22
9+960-22
969-22
947
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3 0
3 years ago
Read 2 more answers
Find the volume of a 2by2​
STALIN [3.7K]

Answer:

24

Step-by-step explanation:

2+2+2 = 6*2 = 12*2 = 24

3 0
2 years ago
Working his way through school, Joe works two part-time jobs for a total of 18 hours a week. Job A pays $5.70 per hour, and Job
ad-work [718]

Answer:

A = 14.2/1.1 hours

B = 5.091 hours

Step-by-step explanation:

Formulate 2 simultaneous equations

5.7A + 6.8B = 111.40..........(1)

A +B =18...............................(2)

Multiply each item in (2) by 5.7 to get

5.7A + 5.7B = 97.2............(3)

subtract (1) - (3) on each side

5.7A -5.7A + 6.8B - 5.7B = 111.40 -97.2

1.1B = 14.2

B = 14.2 /1.1

to get A use equation (2)

A = 18 - B

A = 18 - 14.2/1.1 = 5.091

4 0
3 years ago
Read 2 more answers
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