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charle [14.2K]
2 years ago
9

Simplify the expression 3x -2y+6-6x+5y-8

Mathematics
2 answers:
qaws [65]2 years ago
5 0
You combine like terms

therefore the answer is -3x+3y-2
Ymorist [56]2 years ago
4 0

Answer:

-3x + 3y - 2

Step-by-step explanation:

Collect like terms and add/subtract

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7/5 mile / 2/3 hour worked out please
Elenna [48]

Steps to solve:

7/5 ÷ 2/3

~Dot

7/5 * 2/3

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7/5 * 3/2

~Multiply

21/10

Best of Luck!

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What is the awsner to (-6)(8) + (-11)
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Step-by-step explanation:

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Solve x2 + 8x − 3 = 0 using the completing-the-square method.
lisabon 2012 [21]
(a+b)^2=a^2+2ab+b^2\\------------------\\\\x^2+8x-3=0\ \ \ |add\ 3\ to\ both\ sides\\\\x^2+2x\cdot4=3\ \ \ |add\ 4^2\ to\ both\ sides\\\\x^2+2x\cdot4+4^2=3+4^2\\\\(x+4)^2=3+16\\\\(x+4)^2=19\iff x+4=-\sqrt{19}\ or\ x+4=\sqrt{19}\\|subtract\ 4\ from\ both\ sides\\\\\boxed{x=-4-\sqrt{19}\ or\ x=-4+\sqrt{19}}
3 0
3 years ago
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What is the estimate of 1/7 x 20 and 1/9 of 82?
devlian [24]
I believe the answer to 1/7 times 20 would be 2.9 that is rounded to the nearest tenth but if your rounding to the nearest whole number it would be 3
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3 0
3 years ago
Need help on the blanks. Pretty lost atm
nlexa [21]

Answer:

  • -108.26
  • -108.13
  • -108.052
  • -108.026
  • -108

Step-by-step explanation:

A graphing calculator or spreadsheet is useful for making the repeated function evaluations required.

The average velocity on the interval [a,b] will be ...

  v avg = (y(b) - y(a))/(b-a)

Here, all the intervals start at a=3, so the average velocity for the given values of t will be ...

  v avg = (y(3+t) -y(3))/((3+t) -3) = (y(3+t) -y(3))/t

This can be computed for each of the t-values given. The results are shown in the attached table.

__

We note that the fractional part of the velocity gets smaller in proportion to t getting smaller. We expect it to go to 0 when t goes to 0.

The estimated instantaneous velocity is -108 ft/s.

_____

We can simplify the average velocity equation to ...

  v avg = ((48(3+t) -26(t+3)^2) -(48(t+3) -26(3)^2)) / t

  = (48t -26(t^2 +6t))/t

  = 48 -26t -156

<em>   v avg = -108 -26t</em>

Then the average velocity at t=0 is -108.

5 0
3 years ago
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