1. select pairs of ratios that form a true proportion. select all that apply
a. 3: 6 and 5: 10
b. 4/12 and 6/18
c. 20/5 and 10/3
d. 25: 36 and 8: 9

2. solve the proportion 42/15 = p/10
a. p= 37
b. p=28
c. p = 26
d. p = 24

3. which is the better buy?
1. 5 oranges for 1.60.
2. 7 oranges for $2.45

a.1
b.2
c. they are both equal good values.

Part 1)

A) and

B)   and

Part 2) Option B.

Part 3) Option A.

Step-by-step explanation:

Part 1) Verify each case

case A) and

Multiply in cross and then compare

-----> is true

therefore

Is a true proportion

case B) and

Multiply in cross and then compare

-----> is true

therefore

Is a true proportion

case C) and

Multiply in cross and then compare

-----> is not true

therefore

Is not a true proportion

case D) and

Multiply in cross and then compare

-----> is not true

therefore

Is not a true proportion

Part 2) Solve the proportion

Multiply in cross and solve for P

Part 3) Which is the better buy?

1. 5 oranges for $1.60.

2. 7 oranges for $2.45

Find the units rates

First case

Second case

The better buy is the first case

because

step-by-step explanation:

hans did not square the 40-unit side; he merely multiplied it by 2.   incorrect.