Just by the language difference means subtract,
Y^2-25 is the difference of squares
factored it's the sum and difference of their square roots
(x+5) (x-5)
#16
1092...if 4 out of 7 named blue then
1092 * 4/7 = 624 (named blue)
1092...if 1 out of 3 named red then
1092 * 1/3 = 364 (named red)
364 + 624 = 988 (both named red and blue)
1092 - 988 = 104( neither named red nor blue)
answer is 104 people
#17
49 * 15 / 21 = 35
answer is 35
1. Assign an identifying variable to the quantity to be found.
2. Write a sentence stating conditions placed on the quantity.
3. Solve the sentence for the variable.
Answer:
angle 2 ande angle 5
Step-by-step explanation:
-72-54n+36=0
-72+36=54n
-36=54n
n=-36/54