What are the solutions to the equation? Select all that apply. 3x^2 + 6x = 45

Mathematics

1 answer:

sattari [20]3 years ago

5 0

X = $-1 + 3 \sqrt{2}$
x = $-1 - 3 \sqrt{2}$

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A tire dealer sells 2 tires for as much as he paid for 3 tires. he paid $240 for a dozen tires. What is the total profit on 12 t

tester [92]

First, find how much he paid by tire.
To do so, divide what he paid by how many tires he bought like this :
240$ / 12 = 20$ per tire

Then, calculate how much he sells each tire.
To do so, start by calculating how much he paid for 3 tires:
20$ x 3 = 60$

This is the price he sells 2 tires for, therefore :
60$ / 2 = 30$
he sells his tires 30$ each.

Finally, you have to calculate the profit he made by selling 12.
We already know how much it cost, so you need to find how much money he gets selling them :
12 tires x 30$ = 360$

To find the profit, take off the amount he paid from the amount he made :
360$ - 240$ = 120$

There you go!

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2 years ago

What is the graph of the function f(x) = -x^2+x+20/x+4

mr_godi [17]

F(x) = (-x²+x+20) / (x+4)

-x²+x+20 | x+4
+x²+4x -x+5
\\\\ 5x+20
-5x-20
\\\\\\\\\

f(x) = (x+4)(-x+5) / (x+4)

f(x) = (-x+5)

The graph is a decreasing line, with origin from 5.

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2 years ago

A rectangular prism has dimensions 2 feet by 3 by h feet.

Romashka [77]

Answer:

Volume is lxwxh. so it would be 2x3xh

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What is the value of the expression x^2y–y+xy^2–x for x=4 and y=0.25?

stepan [7]

Answer:

0 (zero)

Step-by-step explanation:

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3 years ago

Simplify the following expression 6.187-0.36

yKpoI14uk [10]

To put add plus sign and minus sign, and it gives too negative 0.36, and the answer is equal to 5.827.

=6.187+-0.36
Answer is=5.827

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