MATHEMATICS COLLEGE

What is the solution to the system of equations?3x+10y=-47
5x - 7y=40
O (1.-5)
O (1,5)
0 (-1,-5)
0 (-1,5)

Answers

Answer 1

Answer:

Answer:

x=1 ,y=-5

Step-by-step explanation:

3x + 10y = 47

5x - 7y = 40

____________

21x + 70y = 329. equ 1

50x - 70y = 400. equ 2

subtract equ 1 from 2

=71x = 71

divide both sides by the 71

71/71 = 71/71

x = 1

_________

to find y

substitute x into either equ 1 or equ 2

am using equ 2

5x - 7y = 40

5(1) - 7y = 40

5 - 7y = 40

7y = 5 - 40

7y = -35

divide both sides by the coffecient of y

7y/7 = -35/7

y = - 5

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the second and third terms in the following fibonacci sequence are X and Y. write down algebraic expressions for the first, fourth and fifth terms

Answers

Answer:

(Y-X), X, Y, (X+Y), (X+Y)+Y, ...

Step-by-step explanation:

FIBONACHI SEQUENCE IS A SPECIAL MATHEMATICAL SEQUENCE IN W/C YOU HAVE TO ADD THE LAST AND THE NEXT TERM TO GET THE FOLLOWING TERM, IF SO.. TO GET THE LAST TERM, JUST REDUCE THE 3RD TERM TO YOUR 2ND TERM

TO GET THE 4RTH AMD 5TH TERM, JUST ADD THE FLLOWING CONSECITIVE TERM AS SHOWN IN THE ANSWER

5/7 + 6/7 + 2/7 equals

Answers

Answer:

Step-by-step explanation:

7 is the common denominator.

5 + 6 + 2

========

13/7

1 6/7

1.857

Hi! I believe your answer is 1 17/35 or ---1 $(17)/(35)$ --- because these fractions all have the same denominator, so simply add them all up! You get 13/7, which is an improper fraction. Simplify it by dividing 13 by 7. The answer is 1 17/35, which you cannot simplify anymore. I hope this answer helps you! Good luck and have a great day. :)

Please answer fast will make brainlest

Answers

Answer:

Step-by-step explanation:

The tread life on tires produced at one factory has a standard deviation of sigma equals 4 comma 000 miles. What is the standard deviation of the sampling distribution of the sample means given the sample size is 4

Answers

Answer:

$\sigma_x = 2000$

Step-by-step explanation:

Given

$\sigma = 4000$

$n = 4$

Required

The sample standard deviation

The sample standard deviation cannot be calculated directly. However, we can use the value of standard error because standard error approximates to sample standard deviation.

So, we have:

$\sigma_x = (\sigma)/(\sqrt n)$

$\sigma_x = (4000)/(\sqrt 4)$

$\sigma_x = (4000)/(2)$

$\sigma_x = 2000$

Hence, the sample standard deviation is 2000

Help with this math question please thanks

Answers

For this case, what we should do is use the given equation.
A = P (1 + r) ^ t
Substituting values we have:
3900 = 1100 * (1 + 0.04) ^ t
Clearing t we have:
(1.04) ^ t = (3900) / (1100)
log1.04 ((1.04) ^ t) = log1.04 ((3900) / (1100))
t = log1.04 ((3900) / (1100))
t = 32.3 years
Answer:
the time will be:
t = 32.3 years

If tangent alpha equals negative StartFraction 21 Over 20 EndFraction , 90degreesless thanalphaless than180degrees, then find the exact value of each of the following. a. sine StartFraction alpha Over 2 EndFraction b. cosine StartFraction alpha Over 2 EndFraction c. tangent StartFraction alpha Over 2 EndFraction