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3 years ago

The students are selling cookies at a school fair. Sara is selling three chocolate chip cookies for $2.49.

Mathematics

1 answer:

yan [13]3 years ago

4 0

3 chocolate chip cookies - $2.49 .

So 1 chocolate chip cookies costs 2.49/3=$0.83

1 chocolate chip cookie costs $0.83

20 chocolate chip cookies cost 0.83*20=$16.6

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natta225 [31]

The area of the surface given by $\vec r_1(u,v)$ is 1. In terms of a surface integral, we have

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A retailer ordered a combination of 50 black and white sweatshirts. Each white sweatshirt cost him $10 and

Brut [27]

The number of white sweatshirts is 28

Step-by-step explanation:

Let ordered black shirts be represented by b

Let ordered white shirts be represented by w

So total sweatshirts will be represented by the equation

b+w=50

The total cost of the ordered sweatshirts will be represented by

10b + 12 w= $556

For simultaneous equations as;

b+w=50

10b+12w=556

solving the equations using substitution method where b=50-w

10(50-w)+12w=556

500-10w+12w=556

-10w+12w=556-500

2w=56

w=56/2= 28

b=50-w=50-28=24

Number of white sweatshirts is 28

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Simultaneous equation :brainly.com/question/12919422

Keyword : cost

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