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3 years ago

What is the system of linear equations

Mathematics

1 answer:

Tamiku [17]3 years ago

5 0

A) y = 2x -4
B) x + 2y = 12
A) -2x + y = -4
A) -x +.5y = -2 then adding to B
B) x + 2y = 12

2.5y = 10
y = 4

x = 4

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Mark's age, x , is 6 times his age 2 years ago. which equation represents the statement?

AlekseyPX

Answer:

x = 6(x - 2)

Step-by-step explanation:

His age now is x.

His age 2 years ago was x - 2.

x = 6(x - 2)

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2 years ago

The average score of all golfers for a particular course has a mean of 61 and a standard deviation of 3.5 . Suppose 49 golfers p

Nadya [2.5K]

Answer:

The probability that the average score of the 49 golfers exceeded 62 is 0.3897

Step-by-step explanation:

The average score of all golfers for a particular course has a mean of 61 and a standard deviation of 3.5

$\mu = 61$

$\sigma = 3.5$

We are supposed to find he probability that the average score of the 49 golfers exceeded 62.

Formula : $Z=\frac{x-\mu}{\sigma}$

$Z=\frac{62-61}{3.5}$

$Z=0.285$

Refer the z table for p value

p value = 0.6103

P(x>62)=1-P(x<62)=1-0.6103=0.3897

Hence the probability that the average score of the 49 golfers exceeded 62 is 0.3897

7 0

3 years ago

You and three friends spend $35 on tickets at the movies.Write and solve an equation to find the price of one ticket

marysya [2.9K]

Answer:

$8.75

Step-by-step explanation:

You and three friends = 4 people

$35 / 4 people = $8.75

The cost of one ticket is $8.75

Hope this helps :)

5 0

3 years ago

A stadium has 49000 seats. Seats sell for $25 in section A, $20 in section B, and $15 in section C. The number of seats in secti

eimsori [14]

Answer:

A stadium has 49000 seats.

Seats sell for $25 in Section A, z

$20 in Section B,-------------------x seats

$15 in Section C. ------------------y seats

(x+y)=z

25(x+y)+20x+15y=1052000

25x+25y+20x+15y=1052000

45x+40y=1052000

9x+8y=210400------------------1

2x+2y=49000

Step-by-step explanation:

4 0

3 years ago

The perimeter of a rectangle is 56 inches. The rectangle is 20 inches long. How wide is the rectangle?

Mamont248 [21]

Answer:

The answer is A 8 inches

Step-by-step explanation:

If the perimeter is 56 inches and it is 20 inches long, then you would multiply 20 by two and get 40, then you subtract 40 from 56 and get 16. Finally, you divide 16 by two and get 8. So, A 8 inches will be your answer.

5 0

2 years ago