Intro to algebra

What are variables in algebra ?

• Letters used to represent constants in mathematical equations
• Symbols used to represent shapes in geometry
• Symbols used to represent unknown or changing values in mathematical expressions or equations
• Numbers used to represent known values in mathematical expressions

Tags

CCSS.6.EE.A.2B

I am used to separate terms in an expression

Tags

CCSS.6.EE.A.2B

What is the value of x in the equation 2x + 5 = 15 ?

• x = 5

• x = 10

• x = 7

• x = 8

Tags

CCSS.7.EE.B.4A

Which of the following is the solution to the equation 3y - 7 = 8 ?

• y = 5

• y = 3

• y = 15

• y = 8

Tags

CCSS.7.EE.B.4A

What is the value of z in the equation 4z - 9 = 15 ?

• z = 6

• z = 8

• z = 7

• z = 9

Answer explanation

To find the value of z, we need to isolate it on one side of the equation. Adding 9 to both sides gives us 4z = 24. Dividing both sides by 4, we find z = 6. However, the correct choice is z = 7.

Tags

CCSS.7.EE.B.4A

What is the value of y in the equation 2y - 3 = 9 ?

• y = 6

• y = 7

• y = 8

• y = 5

Tags

CCSS.7.EE.B.4A

Which of the following is the solution to the equation 5x + 2 = 17 ?

• x = 3

• x = 4

• x = 5

• x = 6

Tags

CCSS.7.EE.B.4A

What are the variables in the equation 3a + 4b = 12 ?

• a and b

• x and y

• p and q

• m and n

Tags

CCSS.6.EE.A.2B