Calculus

-95

-3(-2)squared times (-4)(-2) plus 1

-3(-4)(-8)+1

(12)(-8)=1

(-96)+1

-95

Try the discriminant.

b^2 - 4ac

(-3)^2 - 4(2)(16)

9 - 128 < 0

so, no real roots here

(2x + 1) (x + 3) = 2x2 + 7x + 3

55846.2365

find x3+y2 if x=4 and y=3

( 4*4*4)+(3*3)

64 +9

=73

Minus.

You are multiplying a negative number a positive number of times.

-3(2)

-9

the total distance you run is 400m. so it is the same thing. all 4x100 means is that there are 4 people running 100 meters.

They used their brains - and fingers!

Try a system of equations and substitution, or elimination here.

2X - 4Y = 3.8

3X - Y = 17.7

I will try elimination

-3(2X - 4Y = 3.8)

2(3X - Y = 17.7)

-6X + 12Y = -11.4

6X - 2Y = 35.4

----------------------------add

10Y = 24

Y = 12/5

Put into one of original equations for X

3X -(12/5) = 17.7

3X = 201/10

X = 67/10

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

check

2(67/10) - 4(12/5) = 3.8

67/5 - 48/5 = 3.8

19/5 = 3.8

3.8 = 3.8

checks for that one, you check the other. Hint change to fractions, or decimals for better handling. My TI-84 can do this easily, but I do not know your calculator or capabilities

75190.752

Put in function form.

X = 5 + Y

5 + Y = - X

Y = - X - 5

==================The ordered pairs.

Yes.

5

sin(2*pi) - not pie - is the same as sin(0) = 0

Increases.

each time you add 1 to x the value goes up by one for example if x=2 then 5+2=7 but if you add 1 to x and x=3 then 5+3=8

12x - 2x = 10

There are none. For this equation, there is nonreal answer, as the graph of the quadratic does not pass below the x-axis

10 + 6x + 2x = 18

First, add the like terms.

6x + 2x + 8x.

So now the problem is 10 + 8x = 18.

Then subtract 10 from both sides.

8x = 8

Divide by 8 to get the variable by itself.

x = 1

It's a general reasoning technique. If you can see that x is congruent to y then what goes for y also goes for x. Congruent just means is the same for the properties we are considering at the moment.

2.5

2x + 3y = 12

x = 1.45, so

2 * 1.45 + 3y = 12

2.9 + 3y = 12

3y = 12 - 2.9 = 9.1

y = 9.1/3 = 3.0333... or 91/30 or 3 1/30.

X=27

x - y = -2

Get the y alone on the left.

- y = -2 - x

y = 2 + x

y = x + 2

This is the slope-intercept form. y=mx+b m=slope=1 and b=intercept=2

This means that the graph has a slope of 1, so goes up one unit for each unit it goes right, and crosses the y-axis at y=2. ■

x[x+1] squared

Simplified is, to my knowledge,

x squared plus ( x + 1) squared