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Sidana [21]
3 years ago
12

If g(x) = 2x2 - 4 and f(x) = 4x - 9, find

Mathematics
1 answer:
Troyanec [42]3 years ago
5 0

Answer:

D

Step-by-step explanation:

plug in the value to the given expression

f(-4) = 4(-4) - 9

f(-4) = -16 - 9

f(-4) = -25

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An item is regularly priced at $94. It is now priced at a discount of 30% off the regular price.
Vedmedyk [2.9K]
30% off an item would make that item valued at 70% of its original price

94 times 0.7 = 65.8

$65.80
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3 years ago
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PLEASE HELP! A positive number is 1/3 of another number. The sum of the numbers is five less than the square of the larger numbe
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Answer: The numbers are 1 and 3.

Step-by-step explanation:

Let x = smaller number , y= larger number.

As per given,

x=\dfrac{y}{3}   ...(i)

x+y=y^2-5       ...(ii)

Put value of x from (i) in (ii)

\dfrac{y}{3}+y=y^2-5\\\\\Rightarrow\ \dfrac43y=y^2-5\\\\\Rightarrow\ 3y^2-4y-15=0\\\\\Rightarrow\ 3y^2-9y+5y-15=0\\\\\Rightarrow\ 3y(y-3)+5(y-3)=0\\\\\Rightarrow\ (y-3)(3y+5)=0\\\\\Rightarrow\ y=3 \ \ or\ y=\dfrac{-5}{3}

Since numbers are positive , so y=3 is correct.

And x will be 1  [from (i)]

Hence, the numbers are 1 and 3.

7 0
2 years ago
A boat is anchored 2 km south of a lighthouse. The town of Beachton is Located 17 Km East of the lighthouse. What is the distanc
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Answer: the answer is 27.1 km

Step-by-step explanation:

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Find the difference of(ab+8a+1)-(-6ab+4)
vagabundo [1.1K]
Hey there!

When finding the difference of expressions like these, there's a few things you should keep in mind. 

1. When finding the difference of two polynomials, multiply the polynomial that implied to be "negative" by –1 to expand the problem and make it easier to solve. 

2. You combine terms based on their unknown terms, like x, y, x², ab, etc. You cannot combine the terms x and x², but you can combine the terms 6b and 8b by adding them. 

3. You can rearrange your terms however you see fit. If a polynomial is implied as "positive", you can multiply that entire polynomial by +1 to get rid of the parentheses. 

With all that in mind, you can go ahead and solve for your difference, like so:

(ab+8a+1)-(-6ab+4)

(ab+8a+1) (-1(-6ab+4))

(ab+8a+1) + (6ab-4)

ab+6ab+8a+1-4

7ab+8a-3

7ab+8a-3 will be your difference. 

Hope this helped you out! :-)
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Answer:

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Step-by-step explanation:

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