Answer:
Given 7b²-21b-273=7, the solutions are x1 = 8 and x2 = -5.
Step-by-step explanation:
Given 7b²-21b-273=7, first you need to equal zero. So
7b²-21b-273-7=0 ⇒ 7b²-21b-280 = 0
The secon step is to find the solutions applying Bhaskara´s formula x = (-b ± √(b²-4×a×c))/2×a
Where a=7, b= -21 and c= -280
After you identified each term, you have to replace it on the formula so....
x = (21 ± √(21² - 4×7×(-280)))/2×7 ⇒ x = (21 ± √(441 + 7840))/14 ⇒ x = (21 ± √8281)/14
Then you will obtain two values for x, called x1 = 8 and x2=-5.
Answer:
a = 90
b = 28
c = 68
d = 22
Step-by-step explanation:
60% as a percent, and 60/100 as a fraction, hope this helps. c;
Answer:I don't quite understand what your asking. But if you need to graph the following equations, use symbolab or desmos. I can graph it for you , if you need me to just let me know.
Step-by-step explanation:
Desmos.com/graphing symbolab.com
Answer:
24 people
Step-by-step explanation:
1 pizza will feed 3 people
there is 8 pizzas
8 times 3 equals 24