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VARVARA [1.3K]
3 years ago
14

Calculate the current in a circuit with resistance (r) of 30 and electromotive force (e) of 120vac​

Mathematics
1 answer:
igor_vitrenko [27]3 years ago
3 0

Answer:

E=I(R+r)

R+r=30

I=E/(R+r)

I=120/30

I=4A

Step-by-step explanation:

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How many solutions does the system of equations below have? y = 6x − 7 y = 5 3 x + 1 3
True [87]

Answer:

There will be 1 solution to the system of equations.

Step-by-step explanation:

y = 6x - 7

y = 53x + 13

Since the two equations have different slopes and different y-intercepts, there will be 1 solution to the system of equations.

tadah!

4 0
3 years ago
Which expressions record the product of exactly two factors ?
Natasha2012 [34]

Answer:

B. 5(x + y)

C. (x - y)(x + y)

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3 years ago
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school spirit club wants to raise money by selling t-shirts. one local company charges a fixed fee of $75 for creating the desig
Kazeer [188]

Answer:

The profit = $(3x - 75) where x = number of t-shirts sold

Step-by-step explanation:

School spirit club wants to raise money by selling t-shirts. one local company charges a fixed fee of $75 for creating the design and $5 for each shirt that they print.

We have to find the club's income if they sell each t-shirt for $8.

Let the number of t-shirts that the club sell be equal to x.

So the cost of making x t-shirts = 75 + 5x

If the club sells x t-shirts , then the money they earn = 8x

Profit = selling price - cost price

          = 8x - (75 + 5x)

          = $(3x - 75)

The club also needs to sell at least 25 t-shirts to make a profit and from then on makes a profit of $3 on each t-shirt they sell.

6 0
4 years ago
Create a system of linear equations that has one solution. Solve the system using substitution to prove your
bezimeni [28]

Answer:

y = -2x + 3

y = -1/2x + 5

Step-by-step explanation:

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  • so say we choose a slopeA = 2 and slopeB = -1/2, the slopes are perpendicular only if when you multiply them you get -1
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3 0
3 years ago
Can 6,6,12 make a triangle
BARSIC [14]

Very technically, yes. But . . .

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-- It would look like a line segment, because the two ' 6 ' legs
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reach between the ends of it.


5 0
3 years ago
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