Rational numbers are numbers which can be written as a fraction (the formula is p/q). They don't include roots we can't solve in order to get a whole number and pi.
A. 776, pi, 25.209, √9 ---> NO (because of pi)
B. 726, 7/34, 20.209, √9 ---> YES
C. √3, 7/39, 20.3, √9 ---> NO (because of √3)
D. 726, 7/34, 20.209, √5 ---> NO (because of √5
Note that √9 = 3, so it IS a rational number.
Answer:
im pretty sure its 27.
Step-by-step explanation:
if g(x) = 20 then the new problem is 20=x-7
20=x-7 . add 7 to both sides
+7=+7 . +7 cancels out the -7
27=x . <<<answer
There is nothing that multiplies to 12 and adds to 4.
Answer:
4
Step-by-step explanation:
T(n) = n² + 3
T(1) = 1² + 3 = 1 + 3 = 4
Let c = the price of a cd
Let t = the price of cassette tapes
2c+4t=40
3c+5t=55
We could use substitution to solve this system of equations.
2c+4t=40
-2c -2c
__________
4t=40-2c
__________
4
t=10-1/2c
3c + 5(10-0.5c)=55
3c + 50 -2.5c = 55
- 50. -50
________________
0.5c = 5
c = 10
3c + 5t = 55
3(10) + 5t = 55
30 + 5t = 55
-30 -30
____________
5t = 25
t = 5
So, a cd costs $10 and a cassette recording costs $5.
