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tigry1 [53]
3 years ago
9

Rozwiąż równania:

Mathematics
1 answer:
geniusboy [140]3 years ago
3 0

a)\\x-7=(7-x)-(14-2x)\\x-7=7x-14+2x\\x-7=-7+x\\b)\\x-4x+(2x+3)=6(3-x)\\x-4x+2x+3=18-6x\\-x+3=18-6x\\-x+6x=18-3\\5x=15 //:5\\x=3\\c)\\2x+15=16(1+0,125x)\\2x+15=16+2x\\15=16

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if eight times a number is increased by 3 the result is 19 more than six times this digit. find the number
Verdich [7]

Answer:

8

Step-by-step explanation:

Even though we don't know the number yet, let's name this number "n".

8n + 3 = 6n + 19

8n + 3 - 6n = 6n + 19 - 6n

2n + 3 = 19

2n = 16

n = 16/2

n = 8

Our number is 8.

Note: This answer is 100% correct.  

6 0
2 years ago
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Given vectors u = (-3, 2) and v = (2, 1), what is the measure of the angle between the vectors?21 points
Svetach [21]

Answer: C. 119.7°

Step-by-step explanation:

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8 0
3 years ago
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The bases of a right prism are parallelograms with length of one of its sides a=8.5 cm and altitude to that side ha = 4 cm. Find
8090 [49]
Volume is given by:
V=(base area)×(height)
base area=bh
where:
b=base=8.5 cm
h=height= 4 cm
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base area=8.5×4=34 cm²
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V=34×14
V=476 cm³
4 0
3 years ago
Find the equation of the line of best fit in slope intercept form . please help
slavikrds [6]

Answer:

y = (2/5)x + 3

Step-by-step explanation:

Note that the y-intercept is (0, 3) and that the line passes right through the point (5, 5).  First we find the slope of this line:  m = rise/run.

As we move from (0, 3) to (5, 5), we see that x increases by 5 (the run) and y increases by 2 (the rise).  Thus, the slope of this line is m = 2/5.

Now we know that m = 2/5, x = 5, y = 5 and b (the y-intercept) is 3.  Then our equation is y = mx + b, or y = (2/5)x + 3

6 0
3 years ago
Read 2 more answers
Can someone answer these please !!!!!!
katen-ka-za [31]
A. m^2 - 36 = 0
m^2 = 36
m = √36 = 6 or -6

b. 3x^2 + 15 = 0
3x^2 = -15
x^2 = -5
x = √(-5) not possible unless complex numbers is applied
-1 = i^2
x = √(-5) = √(5i^2) = √5i

c. 4d^2 + 16 = 16
4d^2 = 0
d^2 = 0
d = 0


Hope it helped!
4 0
2 years ago
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