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nevsk [136]
3 years ago
9

3x^2 - 4x + 7 (Find the domain of the expression)

Mathematics
1 answer:
Jobisdone [24]3 years ago
3 0
<span><span><span><span>x1</span> </span><span>= <span><span>−(−4) − √<span> (−4)2 − 4×3×7 </span> </span>2×3</span> </span><span>= <span><span>4 − 2 × √ 17 i </span>6</span> </span><span>≈ 0.666667 − 1.374369i</span></span><span><span><span>x2</span> </span><span>= <span><span>−(−4) + √<span> (−4)2 − 4×3×7 </span> </span>2×3</span> </span><span>= <span><span>4 + 2 × √ 17 i </span>6</span> </span><span>≈ <span>0.666667 + 1.374369i</span></span></span></span>
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a math student is standing 40 feet from the base of a water tower. the angle of elevation from her horizontal line of sight is 7
Lerok [7]

9514 1404 393

Answer:

  128 ft

Step-by-step explanation:

The height of the tower above eye-height is related to the angle by ...

  Tan = Opposite/Adjacent

  tan(72°) = (tower height above eye height)/(40 ft)

  tower height above eye height = (40 ft)×tan(72°) = 123 ft

Since eye height is 5 ft, the total height of the tower from the ground is ...

  tower height = eye height + height above eye height

  tower height = 5 ft + 123 ft

  tower height = 128 ft

4 0
2 years ago
John has 12 pounds of dog food and is going to separate it into 3/4 pound portions. How many portions of dog food will he have?
NNADVOKAT [17]

16 portions

explanation:

12 / 3/4

   = 12 * 4/3 

= 4*4 = 16

7 0
2 years ago
The price of an item yesterday was $140. Today, the price fell to $119. Find the percentage decrease.
34kurt

Answer:

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Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
UJUU J
Stels [109]

Answer:

Plese read the complete procedure below:

Step-by-step explanation:

The polynomial is p(a) = (a^4 - 6a^3 + 3a^2 + 26a – 24)

a)

1   -6   3   26   -24    |<u>  1     </u>

<u>      1   -5   -2    24</u>

1   -5   -2   24    0

The remainder is zero, then (a-1) is a factor of the polynomial

b)

1   -6   3   26   -24    |<u>  2     </u>

<u>      2  -8   10    72</u>

1   -4   5   36    48

When p(a) is divided by (a-2) the remainder 28/p(a)

1   -6   3   26   -24    |<u> - 4     </u>

<u>    -4  40  172  -792</u>

1   -10  43  198  -816

When p(a) is divided by (a-2) the remainder -816/p(a)

c) I attached an image of the long division below:

3 0
3 years ago
Mr.Mckay bought b boxes of crackers for $3 each and p pounds of cheese for $4 per pound.How much did he spend in all.
yulyashka [42]
3b + 4p= amount spent
8 0
3 years ago
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