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densk [106]
3 years ago
10

9 Check: 6,350 - 2,460

Mathematics
1 answer:
bazaltina [42]3 years ago
5 0

Answer:

3890

Step-by-step explanation:

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35% of the students in a school of 2060 are freshmen. How many students in the school are freshmen
Svetllana [295]
There are 721 freshman. 
Make 35% a decimal, multiply by 2060
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If 8 of the 15 tests with the heaviest weight then what percent is that
dalvyx [7]
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3 years ago
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Find the angle between u = (8.- 3) and v = (-3,- 8) Round to the nearest tenth of a degree.
Nimfa-mama [501]

Answer:

<h2>90°</h2>

Step-by-step explanation:

First you must calculate the module or the magnitude of both vectors

The module of u is:

|u|=\sqrt{(8)^2 + (-3)^2} \\\\|u|=\sqrt{64 + 9}\\\\|u|=8.544

The module of v is:

|v|=\sqrt{(-3)^2 + (-8)^2} \\\\|u|=\sqrt{9 + 64}\\\\|u|=8.544

Now we calculate the scalar product between both vectors

u*v = 8*(-3) + (-3)*(-8)\\\\u*v = -24+ 24=0

Finally we know that the scalar product of two vectors is equal to:

u*v = |u||v|*cos(\theta)

Where \theta is the angle between the vectors u and v. Now we solve the equation for \theta

0 = 8.544*8.544*cos(\theta)\\\\0 = cos(\theta)\\\\\theta= arcos(0)\\\\\theta=90\°

the answer is 90°

Whenever the scalar product of two vectors is equals to zero it means that the angle between them is 90 °

5 0
3 years ago
Read 2 more answers
Tìm nghiệm của đa thức 3x+15
nika2105 [10]
3x+15=0
<=> 3x=-15
<=> x= -15/3
<=> x= -5
Vậy nghiệm của đa thức 3x+15 là -5
4 0
3 years ago
Please help!!!!!!!!me
vovangra [49]

Answer:

]

OO

Step-by-step exYYplanation:

UIUHUY

3 0
3 years ago
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