3.
a chef bought $17.01 worth of ribs and chicken. ribs cost 1.89 per pound and chicken costs 0.90 per
pound. the equation 0.90 +1.89r = 17.01 represents the relationship between the quantities in this
situation.
show that each of the following equations is equivalent to 0.9c + 1.89r = 17.01. then, explain when
it might be to write the equation in these forms.
a. c=18.9-2.1r. b. r= -10÷2c+9

Step-by-step explanation:

we have that

The linear equation in standard form is

where

c is the pounds of chicken

r is the pounds of ribs

step 1

Solve the equation for c

That means ----> isolate the variable c

Subtract 1.89r both sides

Divide by 0.90 both sides

Simplify

step 2

Solve the equation for r

That means ----> isolate the variable r

Subtract 0.90c both sides

Divide by 1.89 both sides

Simplify

therefore

The equation is equivalent

The equation is helpful, because if I want to know the number of pounds of chicken, I just need to substitute the number of pounds of ribs in the equation to get the result.

use formula for the circle a=3.14

step-by-step explanation:

n=9

step-by-step explanation:

7 times a number = 7n

decreased by 13 = 7n-13

same as is =

5 times the number = 5n

increased by 5 = 5n+5

7n-13 = 5n+5

2n=18

n=9