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strojnjashka [21]
3 years ago
9

Solve 8x+7y=5; 4x-9y=65 using matrices Im soo bad at this stuff haha

Mathematics
1 answer:
zmey [24]3 years ago
8 0
I hope I did not make any mistake but this is a god procedure to solve it, reduce ur matrice to row echelon and you can easily get ur answer I did not have pen ans paper with me so i just try to do it briefly on paint, regards.
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Find P(rolling 3 or 4) with one number cube. <br><br> A. 1/3 <br> B. 1/2 <br> C. 1/6<br> D. 1
Slav-nsk [51]
You have 1, 2, 3, 4, 5, and 6 on a dice. Only 2 of 6 are the rolls that you want. Therefore, it is 2/6, which simplifies to 1/3.
4 0
4 years ago
A boat is marked up 20% on the original price the original price was $50 what is the sale price of the boat before sales taxes
bezimeni [28]

Answer:

42.9

Step-by-step explanation:

20% of 50 is 10

so its 40

40 + taxes

40 + (40*.0725)

6 0
4 years ago
Consider the numbers 3/10 and 4/13
serg [7]
Make bototm number same
3/10 times 13/13=39/130
4/13 times 10/10=40/130

A.
39/130 and 40/130
they are 1/130 apart


B.
a ratioal number between
39/130=390/1300
40/130=400/1300
between 390/1300 and 400/1300
any number from 391/1300 to 399/1300 example 395/1300


3 0
4 years ago
a snowboarder descends a 1200-foot hill in 3 minutes. what is the mean change in elevation per minute
Vilka [71]
If you would like to know the mean change in elevation per minute, you can calculate this using the following steps:

1200-foot ... 3 minutes
x-foot = ? ... 1 minute

1200 * 1 = 3 * x
1200 = 3 * x
x = 1200 / 3
x = 400-foot

The correct result would be 400-foot per minute.
7 0
4 years ago
A town has a population of 20000 and grows at 4% every year. How long will it be until the population will reach 39400?
olga55 [171]

Answer:

The population will be 39400 in approximately 17 years

Step-by-step explanation:

The increase in population after t years is given by the formula

P_t = P_0(1+r)^t

Here

P_0 is the initial population

r is the growth rate and t is time in years

So far we know,

P_0 = 20000

r = 4%

P_t = 39400

Putting the values in the formula

39400 = 20000(1+0.04)^t\\39400 =20000(1.04)^t\\\frac{39400}{20000} = (1.04)^t\\1.97 = (1.04)^t

Taking natural log on both sides

ln |(1.04)^t| = ln |1.97|\\t\ ln\ |1.04| = ln\ |1.97|\\t = \frac{ln\ 1.97}{ln\ 1.04}\\t = 17.287\\t \approx 17

Hence,

The population will be 39400 in approximately 17 years

8 0
3 years ago
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