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Kryger [21]
3 years ago
13

Mark charged a battery. Each minute, the percentage of the battery's capacity that was charged increased by 2.5 percent After 17

minutes of charging, the battery was 61.5 percent full. How full was the battery when the charging began?, How long from the time that Mark started charging did it take the battery to be fully charged?
Mathematics
1 answer:
zhannawk [14.2K]3 years ago
3 0

Answer:

The battery was 19 percent when the charging began.

It took 32.4 minutes for the battery to be fully charged.

Step-by-step explanation:

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Multiply each equation by a constant that would help to eliminate the y terms.
Zinaida [17]

Answer:

Therefore the required resulting equation is

6x-15y=-63\\-15x+15y=90

6 x minus 15 y = negative 63.

Negative 15 x + 15 y = 90

Step-by-step explanation:

Given:

2x-5y=-21         ......................Equation ( 1 )

3x-3y=-18         ......................Equation ( 2 )

To Find:

Expression after multiplying to eliminate y term,

Solution:

So to eliminate 'y' term we need to multiply equation 1 by a constant 3 and equation 2 by a constant -5,  such that equations  becomes

3(2x-5y)=3\times -21\\\\6x-15y=-63 .....( 1 )

-5(3x-3y)=-5\times -18\\\\-15x+15y=90  .....( 2 )

so now by adding new equation one and two we can eliminate y term that means -15y and +15y will get cancel,

Therefore the required resulting equation is

6x-15y=-63\\-15x+15y=90

6 x minus 15 y = negative 63.

Negative 15 x + 15 y = 90

3 0
3 years ago
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Okay can someone pls help me i literally am so confused
masha68 [24]
View answer attached below

5 0
3 years ago
Negative 4,200 divided by 300
Pachacha [2.7K]

Answer:

-14

Step-by-step explanation:

5 0
2 years ago
Please help!<br>What is the longest side of triangle TUV?
xxMikexx [17]
I say UV is the biggest thanks to my vision lol; and cuz I used a ruler.
7 0
3 years ago
Jade ran 6 times around her neighborhood to complete a total of 1 mile. How many times will she need to run to complete 5/6 of m
svetlana [45]
Set up a proportion where number of times is on top and miles is on bottom:
6/1 = x/(5/6)
Cross-multiply:
6*(5/6) = 1*x
5 = x
She must run 5 times around her neighborhood.
7 0
3 years ago
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