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Alja [10]
3 years ago
14

Im doing systems of equations and its 2x+2y=16

Mathematics
1 answer:
xeze [42]3 years ago
8 0

Answer:

x=3, y=5 This means the point would be (3,5)

Step-by-step explanation:

As I am unable to see your work, I am unable to tell you what you did wrong, but I hope you can notice what was wrong by comparing your work to mine

We are given the equations

2x+2y=16\\3x-y=4

The first thing we need to do is solve one of them for a variable and use substitution. I chose the second equation

3x-y=4\\\\y=3x-4

Now we can substitute in this equation for y

2x+2y=16\\\\2x+2(3x-4)=16\\\\2x+6x-8=16\\\\8x=24\\\\x=3

Now that we have the value for x, we can plug it into the second equation to easily find y.

y=3x-4\\\\y=3(3)-4\\\\y=9-4\\\\y=5

Finally, we can plug x and y into the first equation in order to check to make sure it works for the other equation

2x+2y=16\\\\2(3)+2(5)=16\\\\6+10=16\\\\16=16

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lisov135 [29]

Answer:

There are 36 possibilities per character (26 lower case letters + 10 numbers), so the total number of permutations are 36^4 = 1,679,616

Step-by-step explanation:

5 0
3 years ago
Can someone please explain to me how to solve this equation?
Nikolay [14]

Answer:

first of all erase what u have written

Step-by-step explanation:

<h2>Q: 25-(3x+5)=2(x+8)+x</h2>
  • 25-3x-5=2x+16+x
  • 20-6x=16
  • 6x=4
  • x=2/3
6 0
3 years ago
2/3y + v = s solve for y
DanielleElmas [232]

Answer:

y = \frac{3s-3v}{2}

Step-by-step explanation:

Given

\frac{2}{3} y + v = s ( subtract v from both sides )

\frac{2}{3} y = s - v

Multiply through by 3 to clear the fraction

2y = 3s - 3v ( divide both sides by 2 )

y = \frac{3s-3v}{2}

3 0
3 years ago
7)
Llana [10]

Answer:

Step-by-step explanation:

If the first floor of the Willis Tower is 21 feet high. and each additional floor is 12 feet high, then the floor heights as we move from one floor to another we keep increasing by 12feets and forms an arithmetic progression as shown;

21, (21+12), (21+12+12), ...

<em>21, 33, 45...</em>

a) To write an equation for the nth floor of the tower, we will have to find the nth term of the sequence using the formula for finding the nth term of an arithmetic sequence.

The nth term of an arithmetic sequence is expressed as T_n = a + (n-1)d

a is the first term = 21

d is the common difference = 33-21 = 45-33 = 12

n is the number of terms

Substituting the given parameters into the formula;

T_n = 21+(n-1)*12\\T_n = 21+12n-12\\T_n = 21-12+12n\\T_n = 9+12n

<em>Hence the equation for the nth floor of the tower is expressed as </em>T_n = 9+12n<em></em>

<em></em>

b) To get the height of the 65th floor, we will substitute n = 65 into the formula arrived at in (a)

T_n = 9+12n\\T_{65} = 9 + 12(65)\\T_{65} = 9+780\\T_{65} = 789 ft

<em>Hence the height of the 65th floor is 789feets.</em>

4 0
2 years ago
Write each decimal as a fraction reduce to the lowest terms .25
34kurt

.25 = 25/100    (divide top and bottom by 25)

= 1/4



5 0
3 years ago
Read 2 more answers
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