I have no idea how to do this!

Step-by-step explanation:

18.

4(c+5)-f⁴

4(-1+5)-4⁴

4(4)-4⁴

16-256

-240

19.

-3[(w-6)²+x]²

-3[(5-6)²+6]²

-3[-1²+6]²

-3[1+6]²

-3[7]²

-3(49)

-147

20.

3.5[h³-(3j/6)²]

3.5[3³-(3*-4/6)²]

3.5[27-(-12/6)²]

3.5[27-(-2)²]

3.5[27-4]

3.5[23]

80.5

21.

x[y²-(55-y^5)÷3]

-6[6²-(55-6^5)÷3]

-6[36-(55-7776)÷3]

-6[36+7721÷3]

-6[7757÷3]

-6[2585.66]

-15513.96

step-by-step explanation:

f(x)=2x^2 -1 

translation is a function transformation that transform the function in a way of translating. by translating the function its graph is moved  up an down. moving the function f(x) 2 units to the left will be the new function g(x) with the equation: g(x)=f(x+2)=2(x+2)^2 -1

answer by jkismyhusbandbae:

a) how close a measured value is to the actual (true) value.

  measure of length.   there are 12 inches in a foot, and 36 inches in a yard.   one inch is exactly 2.54 centimeters.

accuracy is how close something is to an actual answer but it is not exactly correct.