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So why did you post the same thing twice in 25 minutes????? That's a no-no on bulletin boards.   This is a physics problem. But if you want to solve it like it was a math problem - okay.   1st you can find the x-axis of symmetry.  x= -b/2aThen you can find ...

For a polynomial of form  Ax^2 + Bx + C = 0 A tells the end behavior.  Negative says it opens down, the end behavior is down on both left and right. The axis of symmetry is given by x = -b/2a Find -b/2a, that is the ex value for the vertex. Plug that value into...

If you look at the sides you can see that they are in a ratio of 3,4,5. This is a 3,4,5 triangle - one of the special triangles that never gets put in the book with the 45-45-90 and 30-60-90. So you can see this is a right triangle with the long (10) side as the hypotenuse. Draw a picture...

Evidence is at the bottom after explanation.   The green color of leaves is from the chlorophyll in the leaves. BUT - chlorophyll is Not Green.  There are two colors of chlorophyll; red and blue. The mixture of these two colors being absorbed makes the leaves 'look'...

For f(6)  it means you plug 6 into the equation for x and evaluate it.   Like this: f(x) = 8x - 2        = 8(6) - 2        = 48 - 2   =  46   Do the rest by putting in 1.5, 0, a,...

7x + 9y - 7 = -9   move all but 'y' to the right side 9y = -7x +7 - 9      = -7x -2   divide by 9 y = -7x/9 -2/9    = (-7/9)x -2/9   so compare to y = mx +b and you can find the slope and interc...

d/dx(x^(1/x))   Express x^(1/x) as a power of e      x^(1/x) = e^(log(x^(1/x))) = e^((log(x))/x)      = d/dx(e^((log(x))/x)) Using the chain rule     d/dx(e^((log(x))/x)) = ( de^u)/( du) ( du)/( dx)   ...

d/dx (log(4) x e^x) Factor out constants:      = log(4) (d/dx(e^x x)) Use the product rule,      d/dx(u v) = v ( du)/( dx) + u ( dv)/( dx),      where u = e^x and v = x:      =...

You have a quadratic in the form of: y = (x-h)^2 + k   1) The vertex is (h,k) or (2,-1) 2) The axis of symmetry is x=h  (or x=2) 3) The a=1/2 widens the parabola and is + so the graph opens up The h = +2 shifts the parabola 2 to the right of the y axis The...

Write two equations.   the difference of the two numbers is 17 X - Y = 17   the larger is twice the smaller decreased by 13 X = 2 ·Y - 13   Now solve the simultaneous equations by any method, substitution or by elimination.

But they are not in alphabetical order. CAT - 60 BEAR = 180 sorry but Bear should come before Cat, it is ABC not ACB.

The bank is 1/3 full - that is the same as 2/6 full. When she added 440 pennies if went from 2/6 full to 5/6 full. 5/6 - 2/6 = 3/6 increase for the 440 pennies.   There are 2 ways to think of it from here: 1) 440 pennies was 3/6 of the bank so dividing by 3    ...

How many dice??   If you roll 1 die there are 5 possibilities. If you roll 2 there are 5x5 posibilities Roll 3 and there are 5x5x5 possibilities.

For a parabola in the form y = A(x-h)2 + k  the vertex is (h,k)SO   1) Rewrite the equation in that form. OR Using the x axis of symmetry is -(b/2a)   find x then substitute that into the equation   to get the y value.   x = -(b/2a)...

The tax is 9% of \$65.40 The tip is 20% of \$65.40 - a very generous tip btw.   Tax = 0.09(65.40) = ? Tip = 0.20(65.40) = ?   For the total add up 65.40 plus the tax plus the tip.   I am going to assume you can do the arithmetic on your own.   This...

If this is a thermal chemistry or physics problem there are some things you might be expected to know. If this is a mathematics (pre-calc) problem then you need to know if the change in temperatures is a linear relationship or not, and if not what king of relationship.   In either...

You gave the method to the solution in your question. Solve by substituting y=3x+4  INTO 7x+2y=21   7x+2y=21 becomes 7x+2(3x+4)=21 distribute 7x+6x+8=21 now solve for x

This problem (a physics problem) requires a little more than just being able to solve a simple math formula. You need to understand what is going on well enough see that if one is going X speed and the other is going Y speed then they are traveling towards each other at a speed of X+Y...

Asking the same question twice in 2 minutes only ticks off those of us who are here giving free advice.

x + 0.15 x = \$2 can be thought of as 1(x) + (0.15)x = \$2   so you can change the left side into 1(x) + (0.15)x = (1 + 0.15)x = (1.15) x   giving (1.15) x = \$2   now just solve this for x