Answer: 378
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Work Shown:
f(x) = x^2 - 3x
f(x) = ( x )^2 - 3*( x )
f(-18) = ( -18 )^2 - 3*( -18 ) ... replace every x with -18; now use PEMDAS
f(-18) = 324 - 3*( -18 )
f(-18) = 324 + 54
f(-18) = 378
5 pieces of 1/5 in 1 inch....5 inches...so 5*5 = 25
Answer:
C) 2(4x² + 5x - 4) is your answer
Step-by-step explanation:
Factor out common factors from all terms.
Note the factors for 8 & 10:
8: 1, 2, 4, 8
10: 1, 2, 5, 10
2 is the largest common factor, and so factor out 2
8x² + 10x - 8 = 2(4x² + 5x - 4)
C) 2(4x² + 5x - 4) is your answer
Note that you cannot factor out anymore common factor numbers or variables.
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Answer:
123°
Step-by-step explanation:
2z +9 = x
y = z
2Z +9 + X + z +Y = 360
Substitute for Z
2Z +9 + 2z +9 + z + z = 360
6z +18 = 360
6Z = 342
Z = 57
2(57) +9 = 123
X = 123
Answer:
y = 10x
Step-by-step explanation:
y = amount earned
x = time ( hours )
so lets say she earns $40
40 = 10x
divide by 10 you get
x = 4
she worked for 4 hours
You can use this equation for any amount of time.