OUILL LULUI

Mathematics

2 answers:

lions [1.4K]3 years ago

6 0

Answer:

7x because when there isnt a calculation thing ( + ÷ -) between the number and the x its always times! so 7 times x.

Illusion [34]3 years ago

5 0

Answer and step-by-step explanation:

7x would be the correct answer because 1 week have 7 days and x is the miles she travel each day so it would be miles she travels each day times the number of days per week = x * 7 = x7 or 7x

Hope this helped :3

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Step-by-step explanation:

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If s(x)=x-7 and t(x) =4x^2+3 which expression is equivalent to (t×s)(x)

marshall27 [118]

Answer:

$\large\boxed{(t\times s)(x)=4x^3-28x^2+3x-21}$

Step-by-step explanation:

$s(x)=x-7\\t(x)=4x^2+3\\\\(t\times s)(x)=t(x)\times s(x)\\\\\text{Substitute:}\\\\(t\times s)(x)=(4x^2+3)(x-7)\\\\\text{use FOIL:}\ (a+b)(c+d)=ac+ad+bc+bd\\\\(t\times s)(x)=(4x^2)(x)+(4x^2)(-7)+(3)(x)+(3)(-7)\\\\=4x^3-28x^2+3x-21$