4 years ago

How many sign changes are in the polynomial f(x) = 3x3 + 7x2 + 9x - 1

Mathematics

1 answer:

Stels [109]4 years ago

7 0

6 unless it talks about positive to negative then its 2

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HELP ASAP ILL GIVE U 5 stars

jek_recluse [69]

Answer:

x = 1 . 14

Step-by-step explanation:

5x + 7 + 2x + 1

5x + 2x + 7 + 1

= 7x + 8

= x = 8 / 7

x = 1.1 4

Hope this answer helps you :)

Have a great day

Mark brainliest

7 0

3 years ago

Solve for y in the following equation.

Tju [1.3M]

Answer:

$y = \frac{z^2 - x}{2}$

Step-by-step explanation:

Given:

$\sqrt{x + 2y} = z$

Required:

Solve for y (make y the subject of the formula)

SOLUTION:

$\sqrt{x + 2y} = z$

Square both sides

$(\sqrt{x + 2y})^2 = z^2$

$x + 2y = z^2$

Subtract both sides by x

$2y = z^2 - x$

Divide both sides by 2

$y = \frac{z^2 - x}{2}$

5 0

3 years ago

BRAINLEST IF CORRECT!!!!

Aleksandr-060686 [28]

x + 133 = 180

x = 180 - 133 (Linear Pair)

x = 47

Therefore x° = 47°

Answered by Gauthmath must click thanks and mark brainliest

7 0

3 years ago

Read 2 more answers

5) Choose which postulate proves the triangles congruent.

LuckyWell [14K]

Answer:

AAS

Step-by-step explanation:

HEHE

5 0

3 years ago

X:y=5:3 and x+y=56 work out the value of x-y

Vladimir79 [104]

x - y = 14

given the ratio x : y = 5 : 3

then let x = 5x and y = 3x, hence equation can be expressed as

5x + 3x = 56

8x = 56 ( divide both sides by 8 )

x = 7

Hence x = 5 × 7 = 35 and y = 3 × 7 = 21

Thus x - y = 35 - 21 = 14

6 0

3 years ago