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balandron [24]
3 years ago
13

How many solutions does this equation have? 7a + 5 (a + 3) = 8a + 4 (a + 2)

Mathematics
1 answer:
mart [117]3 years ago
5 0

Answer:

no \: solution

Step-by-step explanation:

1) Expand.

7a + 5a + 15 = 8a + 4a+ 8

2) Simplify 7a + 5a + 15 to 12a + 15.

12a + 15 = 8a + 4a+ 8

3) Simplify 8a + 4a + 8 to 12a + 8.

12a + 15 = 12a + 8

4) Cancle 12a from both sides.

15 = 8

5) Since 15 = 8 is false, there's no solution.

no \: solution

Therefor, this equation has no solution.

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The most recent census for a city indicated that there were 919,716 residents. The population of the city is expected to increas
OLEGan [10]

Answer:

1,474,951.

Step-by-step explanation:

Given a population that increases by a constant percentage, we can model the population's growth using the exponential model.

P(t)=P_o(1+r)^t,$ where \left\{\begin{array}{lll}P_o=$Initial Population\\r$=Growth rate\\$t=time (in years)\end{array}\right\\P_o=919,716\\r=3.7\%=0.037\\$t=13 years

Therefore, the population of the city in 13 years time will be:

P(t)=919,716(1+0.037)^{13}\\\\=919,716(1.037)^{13}\\\\=1,474,950.9\\\\\approx 1,474,951

The population be at that time will be approximately 1,474,951.

3 0
3 years ago
By what number should-15/56 be divided to get -5/6<br><br>pls pls pls pls I need your help ​
mr_godi [17]

Answer:

The desired divisor is n = 21

Step-by-step explanation:

Let that number be n.  Then:

-15/56        -5

---------- = ---------

     n            6

Through cross-multiplication we get:

(-15/56)*6 = -5n, which reduces to:

(-15)(7) = -5n, or 3(7) = n

The desired divisor is n = 21

6 0
3 years ago
I need to know the equations
dem82 [27]
Let l, t, b represent the numbers of lions, tigers, bears, respectively.

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_____
The last 2 equations tell you
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3 years ago
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dimaraw [331]

Answer:

.................

Step-by-step explanation:

hmmm

?

7 0
3 years ago
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