Anonymous
Anonymous asked in Science & MathematicsMathematics · 9 years ago

# math help plzzzzzzzzzzzzzzzzzzzzz?

Use Cramer's Rule to solve the following system of equations.

7x + 5y = 3

3x - 2y = 22

(4, -5)

(1, -2)

(0, 4)

none of these

It is not possible to multiply a 2x5 matrix and a 5x4 matrix.

True

False

When using Cramer's Rule to solve the system of equations containing

2x - y = 1

-4x + 3y = 0

the numerator for the y variable looks like which of these determinants?

The motion of a ball scooped by a field hockey player can be modeled by h = -16t2 + 40t, where t is the time in seconds and h is the height of the ball. Will the ball ever reach 25 feet in the air?

Yes

No

Cannot be determined by the information given.

If 3x - y = -3 and x + 5y = 15, what is the value of y?

0

1

2

3

What kind of solutions does ax2 - bx + c = 0 have if b2 - 4ac < 0?

two real solutions

two complex solutions

one complex solution

one real solutions

Factor x2 + 18x + 80 completely.

(x + 10) (x - 8)

( x - 10) (x - 8)

(x - 10)(x + 8)

none of these

What is the relationship between the lines y = 2x - 7 and y=1/2x - 2

parallel

perpendicular

neither

8y = 3x + 24 is a linear equation.

True

False

If a system of linear equations has one solution, the graph of the lines will be parallel.

True

False

What is the equation for the line that passes through the point (5, -4) and has a slope of -1?

y = x + 5

y = -x + 1

y = -x - 4

none of these

Evaluate 3x2 + 2x - 1 when x = -3.

-34

20

21

32

What type of polynomial is -25x4 - 21?

monomial

binomial

trinomial

none of these

Use synthetic substitution to find f(-2) for f(x) = x4 - 4x3 - 4x + 6

22

56

62

32

Factor x2 + 6x - 27completely.

(x - 9) (x - 3)

( x + 9) (x - 3)

(x + 9)(x + 3)

none of these

It is possible to multiply a 3x4 matrix and a 2x2 matrix.

True

False

Update:

im homeschooled so i dont have a teacher to help me with this