4 (5z+2y) (5z-2y) (Ignore this)
2/7 = 0.29 ---- rounded up plus the 7 = 7.29
(-2 3/7) 3/7 = 0.43 ---rounded up ---- plus the -2 = -2.43
7.29 - (- 2.43) = 9.72 ----- negative and negative equal posirive
#18
-2.45 - (-3.94) = 1.49
Answer:
Step-by-step explanation:
You want to set up a system. We are given some points fo we can set up inputs and outputs. F(0) = 5, given by point (0,5). and F(3)=135, given by point (3,135). The exponential function general equation is F(x)= a(b)^x. plug in out functions into the general equation to get a(b)^0=5 and a(b)^3=135. Then you simplify and solve for a. In the equation a*b^0=5, anything to the power of 0 is 1. so a*1=5. Therefore a=5. we plug in the a to the second equation to find b. 5*b^3=135. b^3=27. b=3 from simplifying. Therefore, the equation should be 5(3)^x. THATS IT!
