The sum of two numbers is 21 and their difference is 13

Set up 2 equations:

x + y = 21

Y- x = 13

Rewrite the last one as y = 13 + x

Now replace y in the first one:

X + (13+ x) = 21

Simplify:

2x + 13 = 21

Subtract 14 from both sides:

2x = 8

Divide both sides by 2:

X = 4

Now you have x solve for y:

Y = 13 + x = 13 + 4 = 17

The numbers are 4 and 17

1/3

step-by-step explanation:

to find this, you can divide 12 by 4 which is 3 or you can multiply 4 until you reach 12 (4x3=12). both should give you 3, meaning theres three times less bananas than there are oranges.

question: how many people can she serve?

answer: she can serve 16.66666667 people. so she can only give 16 people a complete serving.

question: does she have enough ice cream for her guests?

answer: no. explanation: she only has enough for 16 people to have a full serving. however, she can give a 17th person a partial serving.