On one day, a store sold 16 boxes of rice, restocked the shelf with 22 boxes, sold 27 boxes, restocked with 30 boxes, and sold 15 boxes. there are now 21 boxes of rice on the helf. how many boxes are on the shelf at the start of the day?

There are 27 boxes are on the shelf at the start of the day.

Step-by-step explanation:

Let number of boxes are on the shelf at the start of the day is x

According to given situations :

On one day, a store sold 16 boxes of rice

i.e,

Restocked the shelf with 22 boxes,

⇒

But 27 boxes sold

⇒  

Restocked with 30 boxes,

⇒  

But 15 boxes sold,

⇒  

There are now 21 boxes of rice on the shelf.  

So,  

Therefore,There are 27 boxes are on the shelf at the start of the day.

0

step-by-step explanation:

you can not divide by 0 so 4 ÷ 0 would be 0

0 × 9999 =0

mark brainliest   : )

for the friend request.

when a figure, such as triangle (xyz) is reflected over the line y = x to create x'y'z' the x-coordinates and y-coordinates of the original image (pre-image) will be reversed for the image. (e.g., (x, y) > (y, x)) this means that the pre-image position of the x- and y-coordinates switch places which in turn provides a mirror like image of the original xyz.  

i notice that when i draw a line segment from x to x', that the points are parallel from each other -- they are exactly across from each other and do not intersect with any other points.  

yes, think i would see the same characteristic if you drew the line segment connecting y with the reflecting line and then y' with the reflecting line because of the essence of reflections. because it is a mirror image, each point was effected the same way which leads me to conclude that they same would apply to y and y'.