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3 years ago

11j-20=6j+15 please help

Mathematics

1 answer:

Ronch [10]3 years ago

6 0

Answer:

j=7

Step-by-step explanation:

11j-20=6j+15

-6j -6j

5j-20=15 Isolate the variable:

+20 +20

5j=35 Divide to get variable by itself

j=7

Hope this helps :)

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3 years ago

Is 10(x-2)=5(2x-4) infinitely many or no solution

Pani-rosa [81]

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4 years ago

2,000,000 mg = how many kg?

cluponka [151]

$1kg=1,000g\\1g=1,000mg\\\\therefore\\1kg=1,000\times1,000mg=1,000,000mg\to1mg=\frac{1}{1,000,000}kg\\\\2,000,000mg=\frac{2,000,000}{1,000,000}kg=\boxed{2kg}$

8 0

3 years ago

Please please help help please please ASAP

krek1111 [17]

Answer:

false

Step-by-step explanation:

The horizontal axis is the x axis.

I don't really know what your school wants in the blank but here's what I think it is:

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7 0

3 years ago

A thermometer is removed from a room where the temperature is 70° F and is taken outside, where the air temperature is 40° F. Af

fgiga [73]

Answer:

53.3324

Step-by-step explanation:

given that a thermometer is removed from a room where the temperature is 70° F and is taken outside, where the air temperature is 40° F.

By Newton law of cooling we have

T(t) = $T+(T_0-T)e^{-kt}$

where T (t) is temperature at time t,T =surrounding temperature = 40, T0 =70 = initial temperature

After half minute thermometer reads 60° F. Using this we can find k

$T(0,5) = 40+(70-40)e^{-k/2} = 60\\e^{-k/2} =2/3\\-k/2 = -0.4055\\k = 0.8110$

So equation is

$T(t) = 40+(30)e^{-0.8110t}\\$

When t=1,

we get

$T(1) = 40+(30)e^{-0.8110}\\\\=53.3324$

5 0

3 years ago