Graph this function: y–3= – (x+10) Click to select points on the graph.

Mathematics

1 answer:

Nikolay [14]2 years ago

7 0

Answer:

See below

Step-by-step explanation:

We can simply use a graphing calculator to graph the function

$\boxed{y-3 = -(x+10)}$

See in the attached file!

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Assume that advanced students average 93% on an achievement test and regular students averaged 75%. If 100 advanced students and

Lemur [1.5K]

Average (mean) = (sum of all the data) / (# of data)

sum of all the data = (average)(# of data)

Thus for 100 students with an average of 93,
sum of all data = (93)(100) = 9300

and for 300 students with an average of 75,
sum of all data = (75)(300) = 22500

Therefore you would expect the overall average to be
(9300 + 22500) / (100 + 300) = 79.5 %

Now if there are x # of advanced students and y # of regular students, then

x + y = 90 (total # of students) and 93x + 75y = 87(x + y) (overall average)

The second equation can be simplified to x - 2y = 0

Subtracting the two equations yields

x = 60 and y = 90

Therefore you would need 60 advanced and 30 regular students.

7 0

3 years ago

What is the ans? what is the ans of it

umka21 [38]

We have 20 chances out of 100 which is 20/100=1/5 other known as 1 in 5 chance

The even numbers are 2, 4, 6, .., 100. 50 chances out of 100 which is 50/100=1/2 other know as 1 in 2 chance

6 0

3 years ago

4 math problem

Aneli [31]

Answer:

Step-by-step explanation:

1)y=-6x-14 ---------(i)

-x-3y=-9 ---------- (ii)

Substitution method:

Substitute y value in equ (i)

-x -3*(-6x-14) = -9

-x - 3*-6x -3*(-14)= -9