x = number of 1-cent stamps
y = number of 8-cent stamps
z = number of 12-cent stamps
We have 31 stamps all together, so x+y+z = 31.
"I have 4 more 1-cent stamps than 8-cent stamps" means we have the equation x = y+8. Whatever y is, add 8 to it to get x. Solve for y to get y = x-8.
You also have "twice as many one cent stamps as 12 cent stamps", so x = 2z. Solving for z gets you z = 0.5x
-------------
x+y+z = 31
x+x-8+z = 31 ... y replaced with x-8
x+x-8+0.5x = 31 ... plug in z = 0.5x
2.5x-8 = 31
2.5x = 31+8
2.5x = 39
x = 39/2.5
x = 15.6
Your teacher made a typo somewhere because we should get a positive whole number result for x (since x is a count of how many 1-cent stamps we have).
180 °- 121°
= 59°
the answer is 59°
Answer: 35 more times
How: (if she gets 60 points for each grocery store visit then first do 2580-480=2100. she still needs 2100 points so then 2100/60 = 35 grocery visits!)
Step-by-step explanation:
domain is all real numbers since its quadratic: (-infinity, infinity)
Range is from -6 to positive infinity or [-6, infinity)
Answer:
25%
Step-by-step explanation:
As the given situation the parameters are below:-
Cost of each box = 3 pounds
Amount of cereal in each box = 160 g
now,
160 g of cereal = 100%
and
25% of 1 box of cereal = 25% of 160 g which is
As per the question, it is mention that Jane need her idea to give the equal value of amount as Tim's idea, provided
160 g of cereal costs 3 pounds
and
1 g of cereal will cost
= 
40 g of cereal will cost 
So, the percentage of 
the pound is of 3 pounds is 3 ÷ 4 ÷ 3 × 100
= 25%
Therefore as the situation, Jane need to decline the amount by 25% for the same amount as Tim's idea.
