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Scorpion4ik [409]
2 years ago
14

Plsss answer the questions​

Mathematics
1 answer:
Ugo [173]2 years ago
6 0

Answer:

1) (7x - 8) - (2x + 4)

= 7x - 8 - 2x - 4

= 5x - 12

2) (8x - 6y) - (2x - y)

= 8x - 2x -6y + y

= 6x - 5y

3) (12xy + 5y) - (23xy - 3y)

= 12xy - 23xy + 5y + 8y

= -11xy + 13y

= 13y - 11xy

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Which expression is equivalent to (2−√−4)+(1+√−49)? <br> 3−5i <br> 3+5i <br> 8+0i <br> −2+0i
sergij07 [2.7K]

Answer:

3 + 5i.

Step-by-step explanation:

(2−√−4)+(1+√−49)

√−4 = 2i  and

√−49 = 7i.

So   (2−√−4 + (1+√−49

= ( 2 - 2i) + (1 + 7i)

=  3  + -2i + 7i

= 3 + 5i.

3 0
4 years ago
(1 point) let a=⟨−4,−3,2⟩a=⟨−4,−3,2⟩. find a unit vector in the same direction as aa.
sergij07 [2.7K]
A unit vector in the direction of a would be the vector a multiplied by a factor such that the length of vector a is unity.
The magnitude of a is given by:
|a|
=sqrt(4^2+3^2+2^2)   [ I got lazy instead of writing (-4)^2+(-3)^2+2^2]
=sqrt(29).

So the univector is a/sqrt(29), or (-4/sqrt(29),-3/sqrt(29), 2/sqrt(29), or simply (-4,-3,2)/sqrt(29).

8 0
3 years ago
What is the slope of the line that is parallel to the line whose equation is 2x + y = 4. Type a numerical answer in the space pr
Contact [7]
The slope to the this equation is -2
3 0
3 years ago
Which is the ratio of the number of months that begin with the letter J to the total number of months in a year? (2 points) 12 t
jeka57 [31]

Answer:

3-12

Step-by-step explanation:

January

June

July

That is 3 months out of 12 so...3 to 12

8 0
4 years ago
What is the average speed of a car that traveled 153.8 kilometers in 3.7 hours?<br> km/hr
Elina [12.6K]

Answer:

41.5675675676km/hour or 41.57km/hour

Step-by-step explanation:

158÷3.7=41.5675675676  or 41.57

6 0
3 years ago
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