You need to make a proportion
beats 28 x
seconds 4 30
cross multiply and divide
(28) (30) = 4x
840 = 4x
210 = x
5x:2x
2x=38 so to solve for x, divide both sides by 2 --> x=19
Now multiply x by 5 to find big town's score --> 5*19=95
Answer:
2 months ago would be 5,000 insects
5 months ago would be 2,000 insects
Step-by-step explanation:
you divide it by the total number then how many months ago it was
Answer:
a)
+ 6x + 8
b) 6 - 7x
c)
- 7x +4
d) 2x + 5
Step-by-step explanation:
a) (5x + 4) – (x – 2)
(5x + 4) (-x + 2)
+ 10x - 4x + 8
+ 6x + 8
b) (6 – 3x) + (x – 5x)
6 – 3x + x – 5x
6 - 7x
c) (4x + 5) – (3x – 2) – 6
(4x + 5) (–3x + 2) – 6
+ 8x -15x + 10 -6
- 7x +4
d) 9x + 5 – 7x
2x + 5
hope this helps!
For the first one , if your solving for x , the answer would be : x=8-4y
For the first one , if your solving for y , your answer would be : y=2-x/4
2x-7y=-14
Solving for x : x=-7 +7y/2
Solving for y : y=2+ 2x/7