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3 years ago

gas prices decreased this week from $4 per gallon to 3.80 dollars per gallon what is the percent decrease

Mathematics

2 answers:

Mrrafil [7]3 years ago

8 0

the answer is 5%, my friend :P

evablogger [386]3 years ago

5 0

Answer: 5%

Is the percentage

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Anna35 [415]

I think it’s D but I’m not really sure.

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4 years ago

Assuming the pattern continues, what are the next three terms in the pattern: Z, x, V, t, ______?

Nookie1986 [14]

I believe the answer is 4) R, p, N. I hope this helps

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3 years ago

F(x)=x2-10 and g(x)=11-x find (f-g)(x)(f-g)(10) and (f/g)(x) if they exist

tester [92]

Answer:

$(f - g)(x) = x^2 + x-21$

$(f - g)(10) = 89$

$(f/g)(x) = \frac{x^2 - 10}{11 - x}$

Step-by-step explanation:

Given

$f(x) = x^2 - 10$

$g(x) = 11 - x$

Solving (1): (f-g)(x)

$(f - g)(x) = f(x) - g(x)$

Substitute values for f(x) and g(x)

$(f - g)(x) = x^2 - 10 - (11 - x)$

Open Bracket

$(f - g)(x) = x^2 - 10 - 11 + x$

$(f - g)(x) = x^2 -21 + x$

Reorder

$(f - g)(x) = x^2 + x-21$

Solving (2): (f-g)(10)

In (1)

$(f - g)(x) = x^2 + x-21$

So:

$(f - g)(10) = 10^2 + 10-21$

$(f - g)(10) = 100 + 10-21$

$(f - g)(10) = 89$

Solving (3): (f/g)(x)

$(f/g)(x) = \frac{f(x)}{g(x)}$

Substitute values for f(x) and g(x)

$(f/g)(x) = \frac{x^2 - 10}{11 - x}$

6 0

3 years ago

What are the real zeros of f(x) = x3 – 3x2 – 4x? A. 0, 1, 4 B. 1, -1, 4 C. -1, 0, 4 D. 1, 0, -4

Natalka [10]

Step-by-step explanation:

$f(x) = x^3 - 3x^2 - 4x$

factor it: (start by factoring out the x that is common to all 3 )

$= x\left(x^2-3x-4\right)$

next keep factoring the inside...

$= x\left(x^2+x-4x-4\right)\\=x \left[x\left(x+1\right)-4\left(x+1\right)\right]\\=\bold{x\left(x+1\right)\left(x-4\right)}$

So, the only way the function $f(x)$ can be $0$ is if:

either $x=0$ , or
$\left(x+1\right)=0$ , or

$\left(x-4\right)=0$

<h3>Answer:</h3>

<em>C.</em> $\{-1,0,4\}$

5 0

3 years ago

Let k(x)=3x+7 and n(x)=-5x - 8 , find n(k(x)).

cricket20 [7]

Answer:

Step-by-step explanation:

5 0

3 years ago

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gas prices decreased this week from $4 per gallon to 3.80 dollars per gallon what is the percent decrease​

gas prices decreased this week from $4 per gallon to 3.80 dollars per gallon what is the percent decrease