Answer:
I'm guessing it's 70°
Step-by-step explanation:
in the image above you can see I circled the 70°
the same angle is below it to the left. which means it's 70°
Answer:
B
Step-by-step explanation:
If they have no solutions, the lines must not intersect.
If they don't intersect, they must be parallel
Answer:
a) 
b) The pollution level at 4 o'clock in the afternoon is of 280 parts per million.
Step-by-step explanation:
The pollution level in the center of a city at 6 am is 30 parts per million and it grows in linear fashion by 25 parts per million every hour.
This means that the pollution in t hours after 6 am is given by:
, which is the answer to question a.
b. The pollution level at 4 o'clock in the afternoon
4 in the afternoon is 10 hours after 6 am, so this is y(10).

The pollution level at 4 o'clock in the afternoon is of 280 parts per million.
Answer:
If the present age is x, then age n years later/hence = x + n. If the present age is x, then age n years ago = x – n. The ages in a ratio a: b will be ax and bx. If the current age is y, then 1/n of the age is y/n.