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aksik [14]
3 years ago
15

Solve the system of equations

Mathematics
2 answers:
Phoenix [80]3 years ago
6 0
The correct answer is letter B, (6,-1).

When you substitute this ordered pair on the equations, you would found out is the correct one.
meriva3 years ago
3 0
SOLVING:

\begin{cases}&2x+6y=6\quad\Longrightarrow\ Equation\ 1\\&3x-2y=20\quad\Longrightarrow\ Equation\ 2\end{cases}\\ \\ \\\textbf{Solve\ "x"\ in\ the\ second\ equation\ and\ replace\ in\ the\ first}\\\textbf{equation:}\\ \\\boxed{x=\dfrac{20+2y}{3}}\\ \\ \\2\left( \dfrac{20+2y}{3}\right)+6y=6\\ \\ \\2(20+2y)+3(6y)=3(6)\\ \\40+4y+18y=18\\ \\22y+40=18\\ \\22y=18-40\\ \\22y=-22\\ \\y= \dfrac{-22}{22}\\ \\y=-1\quad\to\boxed{\spadesuit\ Answer\ \spadesuit}


\textbf{Replace\ "y"\ in\ the\ second\ equation:}\\ \\3x-2(-1)=20\\ \\3x+2=20\\ \\3x=20-2\\ \\3x=18\\ \\x= \dfrac{18}{3}\\ \\x=6\quad\to\boxed{\spadesuit\ Answer\ \spadesuit}\\ \\ \\\mathbb{ANSWERS:}\\ \\(x,y)\Longrightarrow\boxed{\boxed{B\ (6,\ -1)\ \checkmark}}\\ \\ \\\textbf{HOPE\ THIS\ HELPS...!!}
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3 years ago
60:92=105:n what is n?
PIT_PIT [208]
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5 0
3 years ago
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What is the value of x ?
Lostsunrise [7]

Vertical angles are congruent (equal), and the angles below are vertical angles.

x + 40 = 3x

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<u><em>x = 20</em></u>


3 0
3 years ago
Which of the following shows 2x3y - 3x2 + 7y2x - 12y written in standard form?. a) 2x3y+7y^2x-3x^2-12y. b) -12y+7y^2x-3x^2+2x^3y
Evgen [1.6K]
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8 0
2 years ago
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Write an equation for the exponential growth. You will still have t as a variable in the equation
Greeley [361]

Answer:

y=100(1.1^t)

Step-by-step explanation:

we know that

The exponential function is of the form

y=a(b^t)

where

y ---> the number of trucks

t ----> is the time in years

a ---> is the initial value (number of trucks for t=0)

b is the base

r is the rate

b=(1+r)

In this problem we have

a=100\ trucks

substitute

y=100(b^t)

we have the point (1,110)

For t=1 year, y=110 trucks

substitute

110=100(b^1)

solve for b

110=100b

b=110/100=1,1

The rate of growth is

r=b-1=1.1-1=0.10=10\%

the exponential equation is equal to

y=100(1.1^t)

<u><em>Verify for the third point of the table</em></u>

For t=2 years

y=100(1.1^2)=121\ trucks ---->is correct

6 0
3 years ago
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