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ANEK [815]
3 years ago
5

5x²+15x+20=0. find the sum and the product of the roots.​

Mathematics
1 answer:
lara [203]3 years ago
4 0

Answer:

The sum of the roots is -3

The product of the roots is 4

Step-by-step explanation:

You might be interested in
Paul and jose are trying to measure the height of a tree. paul is standing 19m from the foot of the tree and measures the angle
Nina [5.8K]
The firts thig we are going to do is create tow triangles using the angles of elevation of Paul and Jose. Since the problem is not giving us their height we'll assume that the horizontal line of sight of both of them coincide with the base of the tree.
We know that Paul is 19m from the base of the tree and its elevation angle to the top of the tree is 59°. We also know that the elevation angle of Jose and the top of the tree is 43°, but we don't know the distance between Paul of Jose, so lets label that distance as x.
Now we can build a right triangle between Paul and the tree and another one between Jose and the tree as shown in the figure. Lets use cosine to find h in Paul's trianlge:
cos(59)= \frac{19}{h}
h= \frac{19}{cos(59)}
h=36.9
Now we can use the law of sines to find the distance x between Paul and Jose:
\frac{sin(43)}{36.9} = \frac{sin(16)}{x}
x= \frac{36.9sin(16)}{sin(43)}
x=14.9

Now that we know the distance between Paul and Jose, the only thing left is add that distance to the distance from Paul and the base of the tree:
19m+14.9=33.9m

We can conclude that Jose is 33.9m from the base of the tree.

3 0
3 years ago
Select the correct answer from the drop-down menu.
katovenus [111]

1. m+n is the answer

3 0
3 years ago
Read 2 more answers
3. What is the slope of the table shown? Cars Washed Number Money ($) 5 40 10 80 15 120 20 160​
IceJOKER [234]
The slope is 8.
(5,40) (10,80)
80-40=40
10-5=5
40/5=8
3 0
3 years ago
Please see questions below.
Norma-Jean [14]
The answer is C sin50...
6 0
4 years ago
PLZ Help fast. It's Pre Calculus. This is the only day i get to spend time with my baby sister. please help fast. WILL MARK BRAI
Ivahew [28]
1) x³ + 2x² - x - 2                            2) 2x³ + 5x² - 8x - 20 = 0

x²(x + 2) - (x + 2)                                x²(2x + 5) - 4(2x + 5) = 0

(x + 2)(x² - 1)                                      (2x + 5)(x² - 4) = 0

(x + 2)(x - 1)(x + 1)                             x = -5/2, +-2

x = -2, 1, -1   << a is the answer.

hope that helps, God bless!
5 0
3 years ago
Read 2 more answers
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