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3 years ago

How do you decide which variable to isolate in order to use the substitution method to solve a system of linear equation?

1 answer:

5 0

It doesn’t really matter which variable you isolate first but usually you would use the one that’s by itself already. like for example one of the equations was y = 8. you would already have your y solve for so you would just have to plug that in for y in the other equation. personally, i usually do x first unless one of the equations has either x or y by itself already. i think its easier to just do x first and then solve for y after that, but it just depends on what the equations are; sometimes it might be easier to just do y first. hope this helps!

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Ali drove 567 miles in 9 hours. At the same rate, how long would it take him to drive 441 miles?

adell [148]

Answer:

7 hours

Step-by-step explanation:

567/9 = 63

441/63 = 7

It would take him 7 hours to drive 441 miles.

Hope this helps

5 0

3 years ago

Let v = 3i + 2j and w = 2i + 3j. Sketch v, w, v + w, 2w, and v − w in the plane

Nimfa-mama [501]

Answer:

Step-by-step explanation:

In the argand plane for plotting points of complex numbers we take i coefficient as x and j coefficient as y and plot as we plot regular points on the graph.

v=3i+2j

Point is (3,2) A

w =2i+3j , Point is (2,3) B

v+w = 5i +5j Point is (5,5) C

2w = 4i+6j , point is (4,6)

v-w = i-j Point (1,-1)

Please find enclosed the above points plotted on the graph.

5 0

3 years ago

After 10 years, Hamid's account earned $300 in interest. If the interest rate (in decimal form) is 0.06, how much did Hamid init

tester [92]

Answer:

p = I/(rt)
p = $500

Step-by-step explanation:

To solve the equation I=prt for p, divide by its coefficient, rt. That gives ...

p = I/(rt)

Now, to answer the question, you can substitute the given values for I, r, t and you have ...

p = $300/(0.06·10) = $500

Hamid initially invested $500.

6 0

3 years ago

What is the gif of nine and fifty two

Novosadov [1.4K]

I assume you mean 9+52,
If so you can add the 9 and the 2 together:
9+2 = 11

Then you can add the 11 on to the 50 to get the final answer:
50+11 = 61

Hope this helps! :)

4 0

3 years ago

there are 12 players on the basketball roster. 9 of the players are in the 8th grade. What percent of the team is not in the 8th

alexandr402 [8]

Well there are 12 players and 9 are in 8th grade so the rest is leaving 3 so 3/12 so converted to percentage is 25% hoped this helped

3 0

3 years ago

How do you decide which variable to isolate in order to use the substitution method to solve a system of linear equation?​

How do you decide which variable to isolate in order to use the substitution method to solve a system of linear equation?