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lukranit [14]
2 years ago
15

Solve linear system using substitution y=6-2x 7x-y=3

Mathematics
1 answer:
Naddik [55]2 years ago
5 0
\left \{ {{y=6-2x} \atop {7x-y=3}} \right. \\\\substitute\ first\ equation\ into\ the\ second\\\\
7x-(6-2x)=3\\\\
7x-6+2x=3\\\\
9x-6=3\ \ \ | add\ 6\\\\
9x=9\ \ \ | divide\ by\ 9\\\\
x=1\\\\
y=6-2*1=6-2=4
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Mr.Gadgets car broke down on the turnpike.Acme towing charged $30 plus $3 per mile to tow the car.If Mr.Gadget paid $174, how fa
aalyn [17]

The car was towed for 48 miles.

Step-by-step explanation:

Given,

Amount charges by Acme towing = $30

Per mile charges = $3

Total charged = $174

Let, x be the number of miles.

Towing charges + Per mile charges*number of miles = Total charged

30+3x=174

Subtracting 30 from both sides

30-30+3x=174-30\\3x=144

Dividing both sides by 3

\frac{3x}{3}=\frac{144}{3}\\x=48

The car was towed for 48 miles.

Keywords: linear equation, subtraction

Learn more about linear equations at:

  • brainly.com/question/8301701
  • brainly.com/question/8358304

#LearnwithBrainly

8 0
3 years ago
Nora invested $1,500 in a bond at a simple interest rate of 3%. How much will the bond be worth in total after 10 years?
attashe74 [19]
<h2>The bond will be worth in total after 10 years is =$1,950</h2>

Step-by-step explanation:

Given,

Nora invested $1,500 in at a bond simple interest rate of 3%

here P= $1500 R= 3% and t = 10year

Simple interest(I) = \frac{P\times R \times t }{100}

                           =$ \frac{1500\times 3 \times 10}{100}

                           =$ 450

<h3>The bond will be worth in total after 10 years is = $1,500+ $450</h3><h3>                                                                                      =$1,950</h3>

8 0
3 years ago
Can someone help me please?
morpeh [17]
Heya bro!!

------------------------------------

If uh r asking about scientific notification then x must be in lowest form but decimal point is after 1.

So correct answer is 1.04 * 10^2 .

If uh wanna check multiply it.. Uh will get 104.

Hope it helps uh!
5 0
3 years ago
The following stock prices reflect the closing price for the past five days. Find the 3 day SMA
Masteriza [31]

Answer:

solution

Step-by-step explanation: total=209.75

7 0
2 years ago
The volume of a sphere whose diameter is 18 cm is
prohojiy [21]

Answer:

  = 3052.08 cm^3

Step-by-step explanation:

Volume of a sphere is given by

V = 4/3 pi r^3

We know the diameter is 18

d = 2r

18 = 2r

Divide each side by 2

18/2 =2r/2

9 =r

V = 4/3 pi 9^3

V = 4/3 pi (729)

V = 972 pi

Approximating pi by 3.14

V =972 (3.14)

  = 3052.08 cm^3

5 0
3 years ago
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