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Phantasy [73]
3 years ago
12

Find the value of the polynomial 3x 3 – 4x 2+ 7x + 5, when x = 3 and also when x = –3.

Mathematics
1 answer:
babymother [125]3 years ago
4 0

Answer:

71

-133

Step-by-step explanation:

Given the polynomial :

3x³– 4x² + 7x + 5, when x = 3 and also when

x = –3.

Put x = 3

3(3)³– 4(3)² + 7(3) + 5

3(27) - 4(9) + 21 + 5

81 - 36 + 21 + 5

= 71

Put x = - 3

3(-3)³– 4(-3)² + 7(-3) + 5

3(-27) - 4(9) - 21 + 5

-81 - 36 - 21 + 5

= - 133

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Answers please this is very hard :))
snow_lady [41]

Answer:

1. you dont add before you multiply

2 they didnt do the parenthesis first...which was their mistake

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
Translate to words<br> 6.4 - 3x + 8
Sedaia [141]
Six point four minus three x plus eight...

Hope it works... not sure if it asked for that, I’d put that unless explained otherwise

Good luck!
8 0
4 years ago
Suppose that Y takes on the values {0, 1, 2, 3}, each with probability 1/4. Take a random sample of 5 numbers from this distribu
arsen [322]

Answer:

The total number of samples that give this outcome is 5.

Step-by-step explanation:

Since Y takes values in {0,1,2,3}, For us to have that Y_1+Y_2+Y_3+Y_4+Y_5=1 implies that all of them are zero but one. The one that is non-zero necessarily is equal to 1. To calculate the number of samples that give this outcome is equivalent to counting the total number of ways in which we can pick the i-index such that Y_i=1. Note that in this case we can either choose Y1 to be 1, Y2 to be 1 and so on. So, the total number of samples that give this outcome is 5.

8 0
3 years ago
In sugar beet, there is 21% of sugar. How much sugar beet do you need in order to get 7,413 tons of sugar?
almond37 [142]

35300 tons of sugar beet we need in order to get 7,413 tons of sugar.

<u>Step-by-step explanation:</u>

Given that  in sugar beet, there is 21% of sugar.  Need to find out how much sugar beet we need in order to get 7,413 tons of sugar. Let we need x tone of sugar beet. So, according to the asked data, we have

                        21 \% \text { of } x=7413

                        \frac{21}{100} \times x=7413

                        0.21 \times x=7413

                        x=\frac{7413}{0.21}

                        x = 35300 tones

4 0
4 years ago
The length of each side of an equilateral triangle is 74mm, correct to the nearest millimeter. Calculate the smallest possible p
Olin [163]

Answer:

  221 mm

Step-by-step explanation:

The dimension 74 mm is presumed to mean that the actual length could be anywhere in the interval [73.5, 74.5). So, the minimum perimeter is ...

  3 × 73.5 = 220.5 ≈ 221 . . . millimeters

_____

The perimeter of an equilateral triangle is 3 times the side length, since all three sides of the triangle are the same length.

8 0
3 years ago
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