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alexandr402 [8]
3 years ago
13

Two thirds a number plus 4 is 7

Mathematics
1 answer:
tresset_1 [31]3 years ago
6 0
The number is 4.5 because 2 thirds of 4.5 is 3 and 3 plus 4 is 7.

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what number though I can probably help you but what number do you need to round.

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2 years ago
Multiple all the coordinates by 1/5.
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(-1,2) , (2,-1), (2,-1) , (-2,1)

Step-by-step explanation:

-5 x 0.2=-1

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A large mixing tank initially contains 1000 gallons of water in which 40 pounds of salt have been dissolved. Another brine solut
sergey [27]

Answer:

If A(t) represents the amount of salt in the tank at time t, the correct differential equation for A is is dA/dt =  15 - 0.005A

Option C) dA/dt =  15 - 0.005A is the correction Answer

Step-by-step explanation:

Given the data in the question;

If A(t) represents the amount of salt in the tank at time t, the correct differential equation for A is?

dA/dt = rate in - rate out

first we determine the rate in and rate out;

rate in = 3pound/gallon × 5gallons/min = 15 pound/min

rate out = A pounds/1000gallons × 5gallons/min  = 5Ag/1000pounds/min

= 0.005A pounds/min

so we substitute

dA/dt = rate in - rate out

dA/dt =  15 - 0.005A

Therefore, If A(t) represents the amount of salt in the tank at time t, the correct differential equation for A is is dA/dt =  15 - 0.005A

Option C) dA/dt =  15 - 0.005A is the correction Answer

8 0
3 years ago
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vredina [299]

Answer:

\large\boxed{y=\dfrac{4}{5}x-6}

Step-by-step explanation:

The slope-intercept form of equation of a linear function:

y=mx+b

m - slope

b - y-intercept

We have the slope m = 4/5 and the y-intercept b = -6. Substitute:

y=\dfrac{4}{5}x-6

3 0
3 years ago
Read 2 more answers
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