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belka [17]
3 years ago
10

the mean temperature is -3.2 Fahrenheit per day for 5 days. What is the total change over the 5 day period

Mathematics
1 answer:
vazorg [7]3 years ago
8 0
The total change will be 16.
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Solve the system of equations:<br><br> (1) x - y = 3<br><br> (2) 7x - y = -3
arlik [135]

Answer:

x= 70

and y = 67 then

-70-67 =-3

4 0
2 years ago
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The differential equation of a certain system is 20⁢y′⁢′+c⁢y′+80⁢y=0
Sholpan [36]

Answer:

c=80

Step-by-step explanation:

Based on my reading the critical damping occurs when the discriminant of the quadratic characteristic equation is 0.

So let's see that characteristic equation:

20⁢r^2+c⁢r+80⁢=0

The discriminant can be found by calculating b^2-4aC of ar^2+br+C=0.

a=20

b=c

C=80

c^2-4(20)(80)

We want this to be 0.

c^2-4(20)(80)=0

Simplify:

c^2-6400=0

Add 6400 on both sides:

c^2=6400

Take square root of both sides:

c=80 or c=-80

Based on further reading damping equations in form

a⁢y′⁢′+b⁢y′+C⁢y=0

should have positive coefficients with b also having the possibility of being zero.

5 0
3 years ago
"A student measures the length of a rectangularposter to the nearest centimeter and finds thatthe length is 75 cm. Another stude
anastassius [24]

Answer:

See below

Step-by-step explanation:

The result of the calculation of area ( L x W ) should have no more significant digits than the lowest factor ....in this case 75 has only TWO significant digits...... the naswer should have the same ...two

75 * 50.3 = ~3800 cm^2

5 0
2 years ago
John walks m miles each week. Marie’s distance can be found by using the expression : 3m + ½
KiRa [710]

Answer:

21.5 Miles or 21 ½ Miles

Step-by-step explanation:

Plug in 7 as m to 3m + ½.

Then, I get 3(7) + ½.

That concludes to 21 + ½

Add the ".5" or "½" at the end

So, answer is you get is 21.5 of 21 ½

7 0
2 years ago
PLS HELP ME ASAP FOR 1, 2, and 3 (SHOW WORK!!!!) MUST SHOW WORK! +LOTS of POINTS!!
emmainna [20.7K]
1) first find the ratio of gallons to minutes which is 150/6=25, so 25 gallons a minute.now divide 20,000 by 25=800 and that is the answer
2)so, we found the proportion 25:1 or 25 gallons a minute
3)we do the same thing we did for find, find the ratio per square feet 700/2=350, next we divide 1960 by 350. that should get you 5.6

Hope I helped! :)
6 0
3 years ago
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