Lesson Summary NUMBER SENTENCE: A number sentence is a statement of equality for inequality between two
numerical expressions,
TRUTH VALUES OF A NUMBER SENTENCE: A number sentence is said to be true if both
numerical expressions evaluate to the same number, it is said to be false otherwise, True and
false are called truth values,
Number sentences that are inequalities also have truth values. For example, 3 < 4,68 >15
12, and (153) 241.80 - 32 are all the number sentences, while the sentence 9 > 314) is
hp

answer: all of the odd numbers were opened

the first person was the one that was opening all of the lockers. since one is odd, this causes all of the odd number lockers to be opened in the end.

answer: solve 5\cdot 2^x=2405⋅2  

x

=2405, dot, 2, start superscript, x, end superscript, equals, 240.

solution

to solve for xxx, we must first isolate the exponential part. to do this, divide both sides by 555 as shown below. we do not multiply the 555 and the 222 as this goes against the order of operations!

\begin{aligned} 5\cdot 2^x& =240 2^x& =48 \\ \end{aligned}  

5⋅2  

x

2  

x

​    

=240

=48

​

step-by-step explanation:

graph b

step-by-step explanation:

one solution- graph a (clear intercepting point.)

no solution- graph b (they're parallel, there will never be a point of interception.)

infinite solutions- graph c (all points intercept.)