Tulem solving
for exercises 21-23. use the following
information. then estimate to find
the distance sound travels through
each material in each given time.
speed of sound
through materials
5.000
sound travels through different materials
at different speeds. for example, the
graph shows that in one second, sound
travels 5,971 meters through stone
however, it travels only 346 meters!
through air in one second.
21. air, 20 seconds
2.000
1.000
material
22. stone, 12 seconds
23. estimate how much farther sound travels through stone
in 17 seconds than through aluminum in the same time.
24. sylvia is saving to buy a new terrarium for her iguana.
she saves $2 the first week, $4 the second week, $8 the
third week, and so on. how much total money will she
save in 5 weeks? solve by completing the table.
week
1 2 3 4 5
amount saved () 248
i want a
new home.
test practice
25. colin bought 7 flats of flowers. each flat contains 24 flowers.
how many flowers did he buy?
@ 140 flowers © 168 flowers
® 154 flowers © 200 flowers
my chapter review 147

h who knows

step-by-step explanation:

add an image

step-by-step explanation:

$650 per month plus utilities

step-by-step explanation:

just based on the info you gave, it would seem more cost effective to rent at $650 per month plus utilities.   if utilities are, in fact, $150 per month, your monthly living costs would be $800 as opposed to the other option of $825.

starting with:    

5 + x - 12 = 2x - 7   

5 + x - 12 - x = 2x - 7 - x (subtract x from both sides)   

5 - 12 = x - 7 (combine and cancel x's from both sides)   

5 - 12 + 7 = x - 7 + 7 (add 7 to both sides)   

0 = x (add numbers together on both sides)       

so in order for the equation to be true, x must be 0.   

trying x = -0.5   

5 + x - 12 = 2x - 7 (original equation)   

5 + -0.5 - 12 = 2(-0.5) - 7 (plug in value of x)   

5 + -0.5 - 12 = -1 - 7 (did multiplication)   

-7.5 = -8 (did addition on both sides)       

since -7.5 is obviously not equal to -8, the value of -0.5 for x is wrong.   

trying x = 0   

5 + x - 12 = 2x - 7 (original equation)   

5 + 0 - 12 = 2(0) - 7 (plug in value of x)   

5 + 0 - 12 = 0 - 7 (did multiplication)   

-7 = -7 (did addition on both sides)       

since -7 equals -7, that demonstrates that the value of 0 for x is correct.   

trying x = 1   

5 + x - 12 = 2x - 7 (original equation)   

5 + 1 - 12 = 2(1) - 7 (plug in value of x)   

5 + 1 - 12 = 2 - 7 (did multiplication)   

-6 = -5 (did addition on both sides)       

since -6 is obviously not equal to -5, the value of 1 for x is wrong.