3 years ago

25 points help me pls

Mathematics

1 answer:

antoniya [11.8K]3 years ago

7 0

Answer:

The first one is x=-y-2z-7

The second one is x=-1/3y + 1/3z + -4/3

The third one is x= 3y + 2z + 17

You might be interested in

The director of admissions at Kinzua University in Nova Scotia estimated the distribution of student admissions for the fall sem

svlad2 [7]

Answer:

The expected number of admissions for the fall semester is approximately 1248 students.

Step-by-step explanation:

We are given the following information in the question:

Number of Students: 1,060 1,400 1,540

Probability: 0.61 0.11 0.3

Formula:

$\text{Expectation} = E(x) = \sum xP(x)$

Expected number of admissions for the fall semester =

$E(x) = \sum xP(x)\\= (1060\times 0.61) + (1400\times 0.1) + (1540\times 0.3)\\=1248.6$

Hence, the expected number of admissions for the fall semester is approximately 1,248 students.

8 0

4 years ago

A participant in a medical study walked 10,388 steps per day. If their

JulijaS [17]

Answer:

55.4068881439

Step-by-step explanation:

Lets first find the feet they walk per day, multiply the steps by the feet/step:

$10,388*2.5=25970$

Now lets find the feet/week by multiplying that value by 7:

$25970*7=181790$

Now lets convert the feet to km:

$181790/3281=55.4068881439$

Resulting in approximately 55 kilometers

7 0

2 years ago

Will give brainliest

Vlada [557]

Answer:

lenght = 2x + 3

breadth = x - 1

perimeter = 40

Now,

perimeter = 2(l+b)

40= 2( 2x + 3 + x - 1)

40= 2(3x - 2)

40 = 6x- 4

40+4 =6x

44/6 =x

x = 7.33

6 0

3 years ago

A line goes through the points. (3,-5) and (5,-1)

AnnZ [28]

Answer:

9+10 equals 21

Step-by-step explanation:

Just bc im big brain

4 0

4 years ago

(8x to the second power plus 17x)+6xto the second power

Phoenix [80]

$8x^2+17x+6x^2=14x^2+17x$

3 0

3 years ago