Ahmed is taking orders for lunch. A slice of pizza costs $2.5 and a chicken
sandwich costs $3.5. He collects $21.5
for the group of 7 people.
Let x = number of pizza orders. Let
y = number of chicken orders.
PLEASE HELP

Step-by-step explanation:

Perhaps you want a system of equations and their solution.

You have defined the variables, so you just need to write the relationships.

  x + y = 7 . . . . we assume one order per person

  2.50x + 3.50y = 21.50 . . . . we assume Ahmed collected just enough

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Multiplying the first equation by 2.5 and subtracting that from the second equation, we get ...

  (2.50x +3.50y) -2.5(x +y) = (21.50) -2.5(7)

  y = 4

  x = 7 -4 = 3

There were 3 pizza orders and 4 sandwich orders.

answer: the answer is (b) amie should have multiplied

step-by-step explanation: given a sphere and a cylinder with same radius and height.

let, 'r' be the radius of the cylinder and sphere and 'h' be the height of the cylinder. according to the question,

r = h.

now, the volume of the sphere will be

and the volume of the cylinder will be

therefore, we have

thus, ammie should have multiplied the volume of the sphere