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OverLord2011 [107]
3 years ago
15

Please help i have no idea what im doing!

Mathematics
1 answer:
Tju [1.3M]3 years ago
4 0

Answer:

x represents hours of babysitting

y represents hours of music lesson

hours on babysitting: 11

hours on music lessons: 7

Step-by-step explanation:

x+y=18

5x+12y=139

-5(x+y=18)

=-5x-5y=-90

(5x+12y=139) + (-5x-5y=-90)

7y=49

y=7

x+7=18

x=11

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A factory worker can produce 28 toys in an eight hour day If there are 42 workers in total how many toys are produced every hour
katrin2010 [14]

Answer:

<em>147 toys</em>

Step-by-step explanation:

<em>for 1 person, 28toys/8hours = 3.5toys/ 1hour </em>

<em>for 42 people, 42 * 3.5toys/ 1hour = 147 toys/hour</em>

<em></em>

<em>~Hope it Helps!~</em>

3 0
3 years ago
What is the equation of the line
Arada [10]

Answer:

y = -7

Step-by-step explanation:

The line represents the y-coordinate, because it is a straight line over the x axis, indicating it cant be an x coordinate

Because it is 7 units below the x-axis, it is -7

y = -7

If my answer is incorrect, pls correct me!

If you like my answer and explanation, mark me as brainliest!

-Chetan K

3 0
3 years ago
1. What is the volume of the following cone? *<br> 2.5 mm<br> 1<br> 12.6 mm<br> 1
mafiozo [28]

Answer: V=πr2h 3

=π·2.52·12.6 3

=82.46681

Step-by-step explanation:

3 0
3 years ago
2/3y+1=1/6y+8 equals what
pickupchik [31]
Explanation:

2/3y+1=1/6y+8
Multiply both sides of the equation by 6 you get
4y+6=y+48


4y+6=y+48
Move variable to the left side and change its sign
4y-y+6=48


4y-y=48-6
Collect like terms
3y=48-6


3y=42
Divide both sides of the equation by 3 and your final answer is
y=14


You’re answer is: y=14 :)


8 0
3 years ago
Molly's basic cell phone plan charges $35.99 for service plus $0.21 per minute beyond the included 250 minutes in the plan. How
Ilia_Sergeevich [38]
The answer is $84.29

Let the number of minutes be x.
$35.99 is fixed price and does not depend on the number of minutes x. Each minute costs $0.21 so it depends on x and we have 0.21x in the function. However, 250 minutes are already included and should not be included in x. Therefore, the function that represents the monthly cost looks like this:
f(x) = 35.99 + 0.21 * (x - 250)

Now, let's calculate for x = 480 minutes:
f(480) = 35.99 + 0.21 * (480 - 250)
f(480) = 35.99 + 0.21 * 230
f(480) = 35.99 + 48.30
f(480) = 84.29
6 0
3 years ago
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