MATHEMATICS HIGH SCHOOL

Use the function f(x) = 2x3 - 3x2 + 7 to complete the exercises.f(−1) =
f(1) =
f(2) =

Answers

Answer 1

Answer:

The value of the function f(x) at $x=a$ can be determined by substituting a instead of x into the function expression.

1. When x=-1, then

$f(-1)=2\cdot (-1)^3-3\cdot (-1)^2+7=-2-3+7=2.$

2. When x=1, then

$f(1)=2\cdot 1^3-3\cdot 1^2+7=2-3+7=6.$

3. When x=2, then

$f(-1)=2\cdot 2^3-3\cdot 2^2+7=16-12+7=11.$

Answer 2

Answer:

Answer:

the correct answer is;

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At the grocery store, you can buy gum in a 6 pack for $11.70 or a 12 pack of gum for $23. Which is the better deal and what is the price per pack of gun if the better deal?

Answers

The better deal is the 12 pack. You would have more gum per dollar. If you bought two six packs, you would be paying $1.95 for a piece of gum. If you bought the 12 pack you would be paying 1.916 (repeating) for a pice of gum.

What is 4 divided by 631

Answers

4÷631=157.75 hope that helps ya!!!!

What is the area of the triangle bounded by the line 3x+2y=12 and the x- and y- axes?

Answers

Answer:

Step-by-step explanation:

If x=0, then the y axis is 6

If y=0, then the x axis is 4

The base is 4 and the height is 6

4 x 6 / 2 = 12

What is the solution to the system of equations graphed below? y = x - 2 y = 4x - 5

Answers

There are 3 available methods - Substitution , Elimination and Matrix.

The substitution method is used to eliminate one of the variables by replacement.

The elimination method is used for solving linear systems.

A Matrix is an array of numbers.

Lets use Substitution to solve this system.

$x-2=4x-5$

$-2=4x-5-x$

$-2=(4x-x)-5$

$-2=3x-5$

$-2+5=3x$

$3=3x$

$3=3x / 3$

$x=1$

Now substitute $x=1$

$y=x-2$

$y=1-2$

$y=-1$

Hence - $x=1 y=-1$

Answer:

1, -1

Step-by-step explanation:

If x3= 27 and y3 =125, what is the value of y-x

Answers

Answer:

Step-by-step explanation:

x^3 = 27

x^3 = 3^3

■ x = 3

y^3 = 125

y^3 = 5^3

■ y =5

■ y- x = 5-3 = 2

A heart plzz

Answer:

32 2/3

(32.6 repeating)

Step-by-step explanation:

29/3 is 9 (just make it not 3 Xs,) so x=9

125/3 is 41 2/3 so y= 41 2/3

41 2/3 - 9 = 32 2/3

John has 12 marbles of different colors, including one red, one green, and one blue marble. in how many ways can he choose 4 marbles, if exactly one of the chosen marbles is red, green, or blue?