By the order of operations, it can be written as
(6*7)-(3^2)*9+(4^3)
Then do it
42-9*9+64=25
Use the algorithm method. Then multiply. The answer should be 135.
If you don't know what algorithm is, it's when you put a number over a number. And multiply it.
Answer:
Step-by-step explanation:
If there are options, please share them.
Subtract 7 from both sides. We obtain: -2x^2 + 3x - 3. The coefficients of this quadratic are a = -2, b = 3 and c = -3. Thus, the discriminant is
b^2 - 4ac, or 3^2 - 4(-2)(-3), or 9 - 24, or -15. Because the discriminant is negative, this quadratic has two complex roots which differ:
-3 ± i√15
x = -----------------
-4
Answer:
Step-by-step explanation:
let the no of girls be x
ratio of boys to girls=4:7
4/7=16/x
do cross multiplication
7*16=x*4
112=4x
112/4=x
28=x
therefore there are 28 no of girls.
Answer:
156
Step-by-step explanation:
Let the sum of the set of numbers = S
So....the mean would be calculated as the sum of the set divided by its number of entries, or :
S / 12 = 13 ....... multiply both sides by 12
S = 13 * 12 = 156 .....so.....the sum is 156