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Ksivusya [100]
3 years ago
5

Solve the system of linear equations. 3x−2y=1 9x−6y=3

Mathematics
1 answer:
irakobra [83]3 years ago
8 0
Get the y by itself

-2y= -3x + 1

Divide -2 to everything

y= 3/2x - 1/2


Other equation (get y by itself)

-6y= -9x + 3
y=3/2x - 1/2

Use substitution

3/2x-1/2=3/2-1/2

0=0

All real numbers (any value of x makes the equation true)
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The population of a particular country was 26 million in 1981; in 1990, it was 31 million. the exponential growth function descr
yuradex [85]
Just use syblol it is verygood for varible form 
5 0
3 years ago
In a sale, the cost of a coat is reduced from 85 to 67.5
IgorC [24]

Answer:

I’m assuming you’re talking about what percentage was taken off, so in that case the answer would be approximately 20.6%

Step-by-step explanation:
67.5/85 X/100

cross multiply then divide by 100 to find for x and you get 79.4117

then, subtract this number from 100 and you will get 20.6%

5 0
1 year ago
10=a/2+7 will give Brainly
Finger [1]
10=a/2 + 7

First subtract 7 from both sides

3=a/2

Next multiple 2 on both sides, so that a is by itself

3(2)=a

A=6
8 0
3 years ago
Find the simple interest earned to the nearest cent for each principal, interest rate, and time.
Y_Kistochka [10]

Answer:

Interest earned at 3.9 percent rate is $31.2

Interest earned at 2 percent rate is $5.8

Step-by-step explanation:

A = P(1 + rt)

Where 'A' is the amount, 'r' is the rate and 't' is the time in years

When;

P = $1200

r = 3.9%

t = \frac{8}{12} years

Then,

A = $1200(1 + 0.039(\frac{8}{12}))

A = $1200 + $31.2 = $1231.2

Interest = Amount - Principal

Interest earned at 3.9 percent rate is $1231.2 - $1200 = $31.2

When;

P = $580

r = 2%

t = \frac{6}{12} years

Then,

A = $580(1 + 0.02(\frac{6}{12}))

A = $580 + $5.8 = $585.8

Interest earned = Amount - Principal

Interest earned at 2 percent rate = $585.8 - $580 = $5.8

4 0
3 years ago
Michaela walked 2/5 mile to the store in 1/4 hour. what is her walking pace in a fraction form
GrogVix [38]
Her walking pace would be 8/5. It is a improper fraction so it would have to be changed to a mixed number! hope this helps
3 0
2 years ago
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