Answer:
11
Step-by-step explanation:
first, distribute the negative four in Expression 1: -36x+8+3
next, set that equal to Expression 2: -36x+11 = -36x+k
finally, add 36x to both sides: 11 = k
Answer: ARITHMETIC PROGRESSION
Step-by-step explanation:
An arithmetic progression where the indices are defines as
FIRST TERM ; 1
COMMON DIFFERENCE ; 1
NUMBER OF TERMS ;1
LAST TERM ; 10
SUM OF TERMS ; 55
Answer:

Step-by-step explanation:
Answer:
Let x be the number of 3-point questions.
Let y be the number of 5 point questions.
You can set up a proportion. The quick answer is 600
7.5/900 = 2.5/x
x = 900 * 2.5 / 7.5
x = 900 * (1/3)
x = 300
But that is not the answer. The question is what does she save.
900 - 300 = 600
You could get the answer more directly. She does not eat 5 oz cake, so solve for that.
5/x = 7.5/900 Cross multiply
5 * 900 = 7.5 x
4500 = 7.5x Divide by 7.5
4500/7.5 = x
600 = x