Barbara is thinking of a number. If you multiply it by 5, then subtract 4, then add 6, and finally divide by 2, the result is 51.
What number is Barbara thinking of?

Help please!!

20

Step-by-step explanation:

start of backwards with 51

instead of divide, multiply: 51 * 2 = 102

instead of addition, use subtraction: 102-6=96

vice versa: 96 + 4 = 100

instead of multiply, divide: 100/5 = 20

and you get 20!!

Answer is 20

Step-by-step explanation:

Let's say the number is x

So x × 5 - 4 + 6 ÷ 2= 51

We do backwards solving meaning everything is opposite so 51× 2= 102

102 - 6 = 96

96 +4 = 100

100 ÷5= 20

So the number is 20

You can even check you

20× 5= 100

100-4=96

96+6= 102

102÷2= 51

solution:

as, mean is defined as sum of all the observations divided by total number of observations.

and , median is mid value of the data whether arranged in ascending order or descending order.

consider, roadsters:

2,3,4,5,6,7,8,9

mean =

also, median= , because number of observations is even, so median is mean of two mid values.

now, coming to bandits

2,3,4,5,6

mean =  

median = 4, as number of observations is odd.

so, roadsters has greater median as well mean than bandits.

→option a is true about the repairs performed on 2 types of cars:

bandits have lower median and mean than roadsters.

the length of o'p' is .

step-by-step explanation:

it is given that the quadrilateral m'n'o'p' is the image of quadrilateral mnop after dilation.

the center of dilation is origin and the scale factor is 1.5.

in dilation the image and preimge are similar figures. it means the sides of image and preimage are proportional.

the scale factor is defined as

the scale factor is 1.5.

multiply both sides by op.

note: if the value of op is given, then multiply the value of op with 1.5 to get the length of side o'p'.

therefore length of o'p' is .