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olasank [31]
3 years ago
5

At the beginning of a laboratory experiment, the temperature of a substance is -12.6 °C. During the experiment, the temperature

of the substance decreases 7.5 °C. What is the final temperature of the substance?
!!!!SHOW YOUR WORK!!!!
Mathematics
2 answers:
Ad libitum [116K]3 years ago
8 0

Answer

20.1°C

Step-by-step explanation:

-12.6 °C - 7.5 °C =-20.1°C

myrzilka [38]3 years ago
7 0

Answer:

the initial temperature= -12.6⁰c

change in temperature= 7.5⁰c

the final velocity = x

-12.6-7.5=x

-20.1=x

so therefore the final temperature is -20.1

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Tickets for a dance recital cost $15 for adults and $7 for children. The dance company sold 253 tickets, and the total receipts
elixir [45]

Answer:

Adult tickets =125

Child tickets = 128

Step-by-step explanation:

Let the number of adult and children tickets sold be x and y respectively

So that

x+y= 253--------1

Since total sales/receipt is $2,771

And given that tickets for a dance recital cost $15 for adults and $7 for children hence

15x+7y= 2771-------2

Solving equation 1 and 2 simultaneously we have

x+y= 253---------------1

15x+7y= 2771----------2

Let us multiply equation 1 by 15 to get equation 3 to eliminate x and subtract equation 2 from 3

15x+15y=3795---------3

-{15x+7y= 2771----------2

0+8y=1024

8y= 1024

y= 1024/8

y= 128 tickets

So solve for x let us put y= 128 in equation 1

x+ 128=253

x=253-128

x= 125 tickets

8 0
3 years ago
What is the effect on the graph of the function f(x) = 2x when f(x) is replaced with f(−5x)?
Amiraneli [1.4K]

Answer:

C) horizontal compression and reflection across the y-axis

Step-by-step explanation:

To quickly solve this problem, we can use a graphing tool or a calculator to plot the equation.

Please see the attached image below, to find more information about the graph

The original equation is:

f(x) = 2x

The new equation is:

f(-5x) = 2(-5x)

f(-5x) = -10*x

The answer is

C) horizontal compression and reflection across the y-axis

4 0
3 years ago
4×+12=36 what number goes in the x?
Nataliya [291]
You can work this out by rearranging the equation and isolating the x.

4x + 12 = 36

4x = 36 - 12 (I moved the +12 to the other side, which means it becomes -12)

4x = 24 (36 - 12 = 24)

x = 24 / 4 (You need to isolate the x, and because it was being multiplied by 4, I divided both sides by 4 to leave me with just x)

x = 6 (24 divided by 4 is 6). 
8 0
3 years ago
6. What is the area of the trapezoid?<br> 19 m<br> I<br> 11 m<br> 41 m
horrorfan [7]

615 but dont take my word for it you know.

5 0
3 years ago
Read 2 more answers
shana found a 27 cm by 18 cm copyof the czech flag on the internet . she wanted to include a smaller copy of the flag in a a rep
scoray [572]
So to find this you multiply each dimension by 2/3, so it would be 18cm by 12cm, so the answer is C. Hope this helps!
3 0
4 years ago
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