Name: 133
Unit 10 & 11 RETEST: Expressions &
Equations
Knowledge - Parts of equations and expressions.
13
1. Label each as either an equation or an expression.
a) 5x - 3 = 12
b) 6x - 3
c) 7x + 5 = 9
2. Label each part of the equation. (numerical coefficient, variable, constant term.
What are the math questions
5x-3=12
6x-3
7x+5=9
Are they an equation or expressions?

Explanation:

To find - 1. Label each as either an equation or an expression.

a) 5x - 3 = 12

b) 6x - 3

c) 7x + 5 = 9

2. Label each part of the equation. (numerical coefficient, variable, constant term.

What are the math questions

5x-3=12

6x-3

7x+5=9

Are they an equation or expressions?

Solution -

1.

An expression containing variables,  numbers, and  symbols.

An equation that has equal to sign.

a.)

5x - 3 = 12

It is an equation (because it has = sign)

b.)

6x - 3

It is an expression

c.)

7x + 5 = 9

It is an equation (because it has = sign)

2.

Variable is those whose values can be change. For example x, y, z...

Constant term whose values are fixed. For example 10, 4, 5

Numerical coefficient are the constants that placed just before the variable. For example in 4x- 4 is the variable coefficient.

a.)

5x-3=12

5 is Numerical Coefficient

12 and -3  is constant term

x is variable

b.)

6x-3

6 is Numerical Coefficient

-3  is constant term

x is variable

c.)

7x+5=9

7 is Numerical Coefficient

9 and 5  is constant term

x is variable

they fuse to form they have half as many chromosomes as a somatic cell of the same individual. b

the relative atomic mass of an element is the mass of one atom of that element, relative to 1/12th of the mass of a  1212c atom. to convert to an absolute mass in kg, it is necessary to multiply by  1.661×10−271.661×10−27.

the relative atomic mass is roughly equal to the number of neutrons, plus the number of protons, in the nucleus of the atom.

for elements with more than one stable isotope (different types of nucleus with different numbers of neutrons but the same number of protons), the quoted mass is usually the average mass, weighted by the relative abundance of the different isotopes.