Algebra 1 EOU 4 Final Exam Review

A.5(C)

• A

• B

• C

• D

Answer explanation

Type both into Desmos. Use trick for standard form.

The lines are directly on top of each other so Infinitely many solutions (AKA all real numbers).

A.5(C)

• A

• B

• C

• D

Answer explanation

x = coffee, y = donuts

First equation: 1 coffee + 2 donuts = $4.90

1x+2y=4.90

Second equation: 2 coffees + 3 donuts = $8.60

2x+3y=8.60

Both in standard form so use MATRIX (yellow calculator).

It asks for coffee, so choose the x value = 2.5

A.5(C)

• A

• B

• C

• D

Answer explanation

Both in standard form, so use MATRIX (yellow calculator)

A.5(C)

• A

• B

• C

• D

Answer explanation

This is like the coffee/donuts question.

15 clicks on website #1 + 29 clicks on website #2 = $94.15

25 clicks on website #1 + 29 clicks on website #2 = $121.15

x=website #1

y=website #2

15x+29y=94.15

25x+29y=121.15

Use MATRIX. It asks for website #1 which is x (top number

A.5(C)

• A

• B

• C

• D

Answer explanation

This is like the coffee/donut question.

x = morning route

y = afternoon route

16x+12y=141

10x+15y=123.75

Both in standard form so use MATRIX.

It asks for morning route (x value).

A.8(A)

• A

• B

• C

• D

Answer explanation

Type the left side on one line in Desmos, right side on another line.

Click the point where they intersect -- it's always the X value

A.8(A)

• A

• B

• C

• D

Answer explanation

type each side on different lines in Desmos click the points where they intersect, type the answers and see what matches

A.8(A)

• A

• B

• C

• D

Answer explanation

type each side on different lines in desmos

click the point of intersection and match with answers

a.8(a)

• A

• B

• C

• D

Answer explanation

Type g(x)= equations first. Click the points where they intersect. The solutions are the x-values.

Use calculator to convert fraction answer choices to decimals.

A.10(A)

• F

• G

• H

• J

Answer explanation

combine like terms