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-Dominant- [34]
3 years ago
12

One printing press can print the whole school newspaper in 12 hours, while another press can print in 18 hours. How long will th

e job take if both presses work simultaneously?
Mathematics
1 answer:
rusak2 [61]3 years ago
8 0

Answer:

7 Hours 12 Minutes

Step-by-step explanation:

So they one of the printer increases at a rate of 1/12 and the other increases at a rate of 1/18. Since you don't know the time it actually takes, you will replace both numerators with and x. (x/12 and x/18). You want to set these up so that they are adding. (x/12 + x/18=1). Since you're adding, you want to change it to the same denominator. The lowest is 36 so you multiply x/12 by 3/3 (so you don't unbalance the equation) and x/18 by 2/2. You'll end up with 3x/36 + 2x/36= 1 which will simplify to 5x/36=1. Multiply each side by 36 to leave the variable by itself. It becomes 5x=36 and when you divide it by 5 you get 7.2. So it's seven and .2 hours, which is equivalent to7 and 1/5 of an hour or 7 hours and 12 minutes.

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Help pls just need the answer... pls and thank you
GuDViN [60]
Answer:
D


Explaining:
8 0
2 years ago
What is an equation of the line that passes through the points (-8, 2) and (-4, -3)?
Alexus [3.1K]

Answer:

y = -5/4x - 8

Step-by-step explanation:

Slope m = (y2-y1)/(x2-x1)

m = (-3 - 2)/(-4 - -8) = -5/4

Given (-8,2)

y = mx + b

2 = -5/4(-8) + b

2 = 10 + b

b = -8

y = -5/4x - 8

4 0
2 years ago
Kiki recorded a video of her parakeet repeating phrases that she said. The video is 234 minutes long. Kiki watched the video 212
PilotLPTM [1.2K]

Answer:

826.8 hours

Step-by-step explanation:

Given data

Lenght of video= 234minutes

number of times watched= 212 times

Based on the information given, we can estimate the number of hours spent watching the video

=234*212

=49608 minutes

in hours

=49608/60

=826.8 hours

in days

=826.8/24

=34.45 days

8 0
3 years ago
Convert 4 gallons to pints. Choose the words and numbers to complete the statements.
Ilia_Sergeevich [38]

Answer:

4 Gallons is 32 pints

Explanation:

Multiply the value of gallons by 8 to convert to pints.

6 0
2 years ago
Read 2 more answers
Then determine which answer
shtirl [24]

Answer:

B.

Step-by-step explanation:

The graph that is going to show the function, has two parts: one for numbers equal or less than 3 and the other for numbers greater than 3

Then, for x≤3, the function is f(x) = 4. This is a constant so the graph is a horizontal line.

Additionally, for x>3, the function is f(x)=12x. This is a straight line with a positive slope.

So, the answer that follows these 2 conditions is B.

3 0
3 years ago
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