Cecilia simplified an expression. Her work is shown below.
Step 1
(6+2) - 1.5x (4.5+0.5)
91-1.5x (4.5-0.5)
7.75x(4.5-0.5)
7.75x9
69.75
Step 2
Step 3
Step 4
Where did Cecilia make her first mistake?

d is the correct answer

step-by-step explanation:

x= 8 because 3x = 3 * 8, and 3*8 = 24

set each factor equal to 0

4x-3 = 0

2x-1 = 0

solve for x.

4x-3=0

4x=3

x= 3/4

solve for x. 

2x-1= 0

2x= 1

x= 1/2

eventually after a few more steps, your answer should be 1/2 is less than or equal to x and 3/4 is greater than or equal to x

54 km / hours

step-by-step explanation:

we need to convert seconds to hours

60 seconds = 1 minutes

60 minutes = 1hour

15 m         60 second   60 minutes

  * *         = 54000 meters/ hour

second     1 minute             1 hour

now we need to convert meters to km

1000 m = 1 km

54000 m       1 km

*   = 54 km / hours

hour               1000m

a) 0

step-by-step explanation:

i^413 x i^0 = 0 as any number multiplied by a zero is

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