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SIZIF [17.4K]
3 years ago
13

4x(3x – 7) – 19x2 Simplify the expression above?

Mathematics
1 answer:
Varvara68 [4.7K]3 years ago
8 0

this is the simplified answer:

-7x *(x+4)

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Estimate a 15% tip for a $26.40 restaurant bill
olchik [2.2K]

Answer:

$4.00

Step-by-step explanation:

because 15% of 26.40 is 3.96 which is closest to $4.00

7 0
3 years ago
If f(x)=8-10x and g(x) =5x +4, what is the value of (fog)(-2)?
swat32

Answer:

  68

Step-by-step explanation:

Any function is evaluated by putting the argument value where the variable is, then doing the arithmetic. When the argument is another function value, that function value is evaluated first.

__

<h3>f∘g</h3>

The "o" in (fog) is a stand-in for the "ring operator" (∘) which is the operator used to signify a composition. A composition is evaluated right-to-left. That means (f∘g)(x) ≡ f(g(x)). The value of g(x) is found first, and is operated on by the function f.

Writing the composition in the form f(g(x)) lets you identify the layers of parentheses. As with any expression evaluation, the Order of Operations applies. It tells you to evaluate the expression in the innermost parentheses and work your way out.

<h3>g(-2)</h3>

To evaluate (f∘g)(-2) = f(g(-2)), we must first evaluate g(-2). That is ...

  g(x) = 5x +4

  g(-2) = 5(-2) +4 = -10 +4 = -6 . . . . . put -2 where x is, do the math

<h3>f(g(-2))</h3>

Now that we know g(-2) = -6, we know this expression is ...

  f(-6) = 8 -10(-6) = 8 +60 = 68 . . . . . substitute for x in 8-10x

Then the value we're looking for is ...

  (f∘g)(-2) = 68

8 0
2 years ago
9.5x - 2.5 for x = 9<br> What is the solution
Oksana_A [137]

Just substitue 9 for x in the expression.

= 9.5(9) - 2.5

= 85.5 - 2.5

= 83

7 0
3 years ago
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I think the answer is 24. Let me know if I helped!
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Answer:

b

Step-by-step explanation:

because i said so and because i am tired and tired and tired

5 0
3 years ago
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