there were 260 students enrolled in a school last year and 40 teachers employed by the same school. this year the number of students increased by 10% but the number of teachers decreased by 5%. find the percentage change of student per teacher ratio of the school

Answers

Answer 1

Answer: The percentage change would be 4%

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Which pairs of angles are alternate exterior angles?Choose exactly two answers that are correct.

Answers

The pair of angles on opposite sides of two lines that are crossed by another line but outside the two lines are called alternate exterior angles.
1 and 7 are alternate exterior angles as well as 2 and 8.

Subtract. use models if needed (-2x+6)-(13×-16)

Answers

-2X+6=-12 negative 12 (-12)
13x-16=-208 negative 208(-208)
-12--208=196

Check my answer!Factor completely: 6x2 – 12x – 18.

A. 3(2x + 3)(x – 1)
B. (3x + 3)(3x – 3)
C. 6(x + 1)(x – 3)
D. 6(x – 1)(x – 3)

The answer would have to be C. or D.

Answers

Factor out a 6

6 / 6x^2 = x^2
6 / -12x = -2x
6 / -18 = -3

6(x^2 - 2x - 3)

Multiply the first term to the last
1 x -3 = -3

(a x b) = -3
(a + b) = -2 (middle term)

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

Plug them in by replacing -2x and simplify

6(x^2 - 1x - 3x - 3)
6((x^2 - 1x) - (3x - 3))
6(x(x - 1) - 3(x - 1))
6(x - 3)(x - 1)

Or in this case, 6(x - 1)(x - 3)

Seema used compatible numbers to estimate the product of (–25.31)(9.61). What was her estimate?–250
–240
240
250

Answers

If she used rounding properly, she would have gotten -25 x 10 = -250

Answer:

-250

Step-by-step explanation:

just did the test

What is the length of a phone call that would cost the same no matter what company is used?Company A - 0.35cents plus 0.3cents per minute
Company B - 0.45cents plus 0.2cents per minute