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3 years ago

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

Mathematics

1 answer:

Stels [109]3 years ago

7 0

6 unless it talks about positive to negative then its 2

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PLEASE GELP ME ASAP RHIS IS TIMING ME!!!!!!!!!!!!

GrogVix [38]

Answer: A .10

Step to step equation :

7 0

3 years ago

Lizette wanted to see if it would be possible to use a little less materials in a tea infuser but still not be required to be at

Oksi-84 [34.3K]

Considering the volume of a rectangular prism, since the new volume is greater than the filled volume, the new dimensions would work, and 90.29% of the infuser would be filled.

<h3>What is the volume of a rectangular prism?</h3>

The volume of a rectangular prism of length l, width w and height h is given by:

V = lwh.

The original dimensions are:

h = 7.9 cm, l = 3 cm, w = 1.5.

Hence the volume in cm³ was:

V = 7.9 x 3 x 1.5 = 35.55 cm³.

The infuser was filled to 80% capacity, hence:

Vf = 0.8 x 35.55 = 28.44 cm³.

For the new dimensions, we have that h = 7 cm, hence the volume is:

Vn = 7 x 3 x 1.5 = 31.5 cm³.

28.44/31.5 x 100% = 90.29%.

Since the new volume is greater than the filled volume, the new dimensions would work, and 90.29% of the infuser would be filled.

More can be learned about the volume of a rectangular prism at brainly.com/question/17223528

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4 0

2 years ago

Trigonometry

Alchen [17]

The area of the triangle PQR is 17.6 square units.

Explanation:

Given that the sides of the triangle are PQ = 12 and PR = 3 and $m\angle P = 78^{\circ}$

We need to determine the area of the triangle PQR

<u>Area of the triangle:</u>

The area of the triangle can be determined using the formula,

$\text {Area}=\frac{1}{2} qr \sin P$

Substituting the values, we get,

$\text {Area}=\frac{1}{2}(12)(3) \sin 78$

Simplifying, we have,

$\text {Area}=\frac{1}{2}(36)(0.98)$

Multiplying the terms, we have,

$\text {Area}=\frac{35.28}{2}$

Dividing, we get,

$\text {Area}=17.64$

Rounding off to the nearest tenth, we have,

$Area=17.6$

Thus, the area of the triangle PQR is 17.6 square units.

3 0

3 years ago

Read 2 more answers

This is the last question which is the fifth one if you can PLS HELP

Trava [24]

I think the answer is b

3 0

2 years ago

Read 2 more answers

You spin the spinner and flip a coin. Find the probability of the compound event. The probability of spinning a number greater t

vagabundo [1.1K]

Answer:

Step-by-step explanation:

the coin is 1/2

the spinner is 3/4

1/2 * 3/4 = 3/8

37.5%

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3 years ago