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aliina [53]
3 years ago
7

What's the difference?

Mathematics
2 answers:
Ad libitum [116K]3 years ago
3 0
In -2xx^{2}, the exponent will be dealt with first. With (-2x)^{2}, the multiplication is going to be done first. This is determined because of Order of operations.
galina1969 [7]3 years ago
3 0
All I know is
(-2x)2= 4x
-2x2= -4x
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The first ten terms of a sequence whose first term is -10 and whose common difference is -2.
otez555 [7]

Answer:

-10

-12

-14

-16

-18

-20

-22

-24

-26

-28

-30

5 0
3 years ago
It would mean a lot to me if you helped with math, i really cant concentrate because my grandfather just passed away and yea ple
AysviL [449]

Answer:

The x intercept of the graph represents the distance that the water hits the ground.  Since the x intercept is (42,0), the water hits the ground 42 ft away from its origin.

Step-by-step explanation:

Sorry to hear about your loss, stay strong and know that he is looking after you from a better place.  

8 0
2 years ago
Avery can run at 10 uph. The bank of a river is represented by the line 4x + 3y = 12, and Avery is at (7, 5). How much time does
Reil [10]
The minimum distance will be along a perpendicular line to the river that passes through the point (7,5)

4x+3y=12

3y=-4x+12

y=-4x/3+12/3

So a line perpendicular to the bank will be:

y=3x/4+b, and we need it to pass through (7,5) so

5=3(7)/4+b

5=21/4+b

20/4-21/4=b

-1/4=b so the perpendicular line is:

y=3x/4-1/4

So now we want to know the point where this perpendicular line meets with the river bank.  When it does y=y so we can say:

(3x-1)/4=(-4x+12)/3  cross multiply

3(3x-1)=4(-4x+12)

9x-3=-16x+48

25x=51

x=51/25

x=2.04

y=(3x-1)/4

y=(3*2.04-1)/4

y=1.28

So now that we know the point on the river that is closest to Avery we can calculate his distance from that point...

d^2=(x2-x1)^2+(y2-y1)^2

d^2=(7-2.04)^2+(5-1.28)^2

d^2=38.44

d=√38.44

d=6.2 units

Since he can run at 10 uph...

t=d/v

t=6.2/10

t=0.62 hours  (37 min 12 sec)

So it will take him 0.62 hours or 37 minutes and 12 seconds for him to reach the river.




8 0
2 years ago
Solve for e.<br><br> 4/3=-6e-5/3
cricket20 [7]

Answer:

e = 1/2

Step-by-step explanation:

to solve foe e in  this 4/3=-6e-5/3

solution

4/3=-6e-5/3

4/3 + 5/3 = 6e

find the lcm of the left hand side

4 + 5/3 = 6e

9/3 = 6e

cross multiply

3 x 6e = 9 x 1

18e = 9

divide both sides by the coefficient of e which is 18

18e /18 = 9/18

e = 1/2

therefore the value of e in the expression above is evaluated to be equals to 1/2

5 0
3 years ago
Which would be the better value?<br> A) 12 pens for $2.70<br> B) 16 pens for $3.40
gregori [183]

Answer:

a

Step-by-step explanation:

8 0
3 years ago
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