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atroni [7]
3 years ago
13

7n + 5 =68.... how to solve this problem and show my work​

Mathematics
2 answers:
mart [117]3 years ago
7 0

Answer:

n=9

Step-by-step explanation:

7n+5=68  Subtract 5 on both sides.

    <u>-5  -5</u>

7n=63       Divide both sides by 7.

<u>/7   /7</u>

n=9

Hope this helps! Have a nice day ^^

snow_tiger [21]3 years ago
5 0

Answer:

n = 9

Step-by-step explanation:

1) Move similar terms to one side. Here we are moving the 5 over to the side with 68 by subtracting it. We also have to subtract 5 from the other side too (what you do to one side you must do to the other)

7n + 5 = 68

     - 5   -5

      7n = 63

2) Isolate the variable. We do this by dividing the 7 from 7n. We also have to divide 7 from other other side too.

     7n = 63

     /7    /7

       n =9

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7 0
3 years ago
Please help i will give brainliest
Scilla [17]

Answer:

x=14.4

Step-by-step explanation:

x=\sqrt{h^2-a^2} \\

x=\sqrt{28^2-24^2}

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x=14.4

7 0
3 years ago
Read 2 more answers
What does 2*-2-(3- -2) equal
Dovator [93]

Answer:

The value of the expression 2*-2-(3- -2) is -9.

Step-by-step explanation:

2 x (-2)- (3- -2)

=2 x (-2)- (3+2)

=2 x (-2) -5

= -4-5

=<u><em>-9</em></u>

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8 0
3 years ago
Read 2 more answers
18.Lupe and her friends spent $20 on snack mix and water. They bought x bags of snack mix and y bottles of water. They bought a
Readme [11.4K]

Answer:

bags of snack = x = 6

bottles of water = y = 5

Step-by-step explanation:

The system of equations can be used to determine how many of each item they bought.

20.00=2.50x+1.00y

11=x+y

how many bags of snack mix did they buy?

Let

bags of snack = x

bottles of water = y

20.00 = 2.50x + 1.00y (1)

11 = x + y (2)

From (2)

x = 11 - y

Substitute x = 11 - y into (1)

20.00 = 2.50x + 1.00y

20.00 = 2.50(11 - y) + 1.00y

20.00 = 27.5 - 2.50y + 1.00y

20.00 - 27.5 = -2.50y + 1.00y

-7.5 = -1.5y

y = -7.5/-1.5

y = 5

Substitute y = 5 into (2)

11 = x + y

11 = x + 5

11 - 5 = x

x = 6

bags of snack = x = 6

bottles of water = y = 5

7 0
3 years ago
Suppose a city with population 800,000 has been growing at a rate of 5% per year. If this rate continues, find the population of
AleksandrR [38]

Answer:

2,340,208.5 or 2,340,209

Step-by-step explanation:

You could answer this by multiplying the current population of 800,000 by 1.05 (1.05 represents the annual growth rate of population) and do that 22 times.  But that would take a while.

we got 1.05 because the formula says that y = a( 1 + r ) power t

for a we will give it 1

so y = 1 ( 1 + 0.05) power t

it will give us 1.05

to do this faster, you would first calculate (1.05)22and then multiply this by 800,000.

So, 800,000 x (1.05)22 = 2,340,208.5 or 2,340,209

5 0
2 years ago
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