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bixtya [17]
3 years ago
13

What is the answer to this equation 6+7x=86 please help me

Mathematics
2 answers:
Anettt [7]3 years ago
8 0

Answer:

11.4

Step-by-step explanation:

  1. subtract 6 from both sides
  2. divide 80 by 7 to get the answer
Nadusha1986 [10]3 years ago
3 0
The answer to this question is 11.43.

In order to do this, first subtract 6 from both sides of the equation.

6 + 7x = 86
-6 -6

7x = 80

Next, divide 7 on both sides. You should end up with 11.42857142....

Lastly, round to get the closest answer which will be 11.43.

Hope this helps! :)
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Round of 1,546 to the<br> nearest thousands
EleoNora [17]

Answer:

1,546 ≈ 2,000

Hope this helps :)

1. To round to nearest thousands, first look at the hundreds place if the number is 1,2,3,4 then round down. If the number is 5,6,7,8,9 then round up.

4 0
1 year ago
Newton's law of cooling states that the temperature of an object changes at a rate proportional to the difference between its te
Aleonysh [2.5K]

Answer:

t=5.18 minute

Step-by-step explanation:

Using Newton's law of cooling

\frac{dT}{dt}=-k(T-T_{s})

T is temperature of a cup of coffee at any time t T_{s}, is the temperature of the surrounding and k is a constant of proportionality in this negative because temperature is decreasing.

T(0)=190\\T(1)=170\\T_{s}=66

\frac{dT}{dt}=-k(T-T_{s})\\\frac{dT}{(T-T_{s})}=-k*dt\\\int\limits {\frac{1}{T-T_{s} } } \, dT=-\int\limits {k} \, dt\\ln(T-T_{s})=k*t+C\\e*ln(T-T_{s})=e^{k*t+C} \\T-T_{s}=e^{k*t}*e^{C}\\e^{C}=C\\T-T_{s}=e^{k*t}*C\\T=T_{s}+e^{k*t}*C

To find constant knowing the time and the temperature the first step of the change of energy in cup of coffee

T=T_{s} +e^{-k*t}*C\\ C=190-66=124\\170=66+124*e^{-k*2}\\ 170-66=124*e^{-k*2}\\ln(\frac{104}{124})=ln*e^{-k*2}\\-0.175=-k*2\\k=0.08794

Now using the constant of decreasing can find the time to be a 145 temperature the cup of coffee

145=66+124*e^{-k*t} \\145-66=124*^{-0.087*t}

ln(0.637)=ln*e(-0.087*t)\\-0.45=-0.087*t\\t=5.18minutes

4 0
3 years ago
PLEASE HELP ME AND BE CORRECT BEFORE ANSWERING
ddd [48]

Answer:

8 units left , 5 units up

Step-by-step explanation:

4 0
3 years ago
Which statement about the slope of the line is true?
givi [52]

Answer:

A

Step-by-step explanation:

sorry I don't kwon how to put it in, in explaination

3 0
3 years ago
The difference between 48 and 13 algebra numeral expression.
Sphinxa [80]

Numerical expressions contain numbers, while algebraic expressions contain variables and numbers.

<u>Numerical Expression</u>

"Difference" indicates that we'll be subtracting 13 from 48.

48 - 13 = 35

<u>Algebraic Expression</u>

Variables represent the unknown number, in this case the difference between 48 and 13. Let d represent the difference between the two.

48 - 13 = d

35 = d

6 0
3 years ago
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