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4 years ago

What multiplies to -240 and adds up to -8?

Mathematics

2 answers:

Vadim26 [7]4 years ago

8 0

-20 and 12 will fill these positions.

-20*12=-240
-20+12=-8

Whitepunk [10]4 years ago

6 0

There none nothing can multiplie to -240 and add up to -8

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Answer:

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Step-by-step explanation:

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4 years ago

Alan drew a scale drawing of a house and its lot. The scale he used was 1 millimeter: 5 meters. In the drawing, the lawn in the

Marat540 [252]

50 meters

Explanation

you can easily solve this by using a rule of three.

Step 1

Let

$\begin{gathered} 1\text{ milemeter}\rightarrow5\text{ meters} \\ \text{the proportion is} \\ \frac{1\text{ mm}}{5\text{ mt}} \end{gathered}$

x represents the length of the actual lawn

then

$\begin{gathered} 10\text{ mm}\rightarrow x\text{ mt} \\ \text{the proportion is} \\ \frac{10\text{ mm}}{\text{xmt}} \end{gathered}$

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Step 2

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2 years ago

Solve for the equation, show all your work. This is an absolute value equation. You need to show both equations and the work for

VMariaS [17]

Answer:

$x=-1$ or $7$

Step-by-step explanation:

We use casework on when $3x-9=12$ and when $3x-9=-12$ .

For the first case, $3x-9=12$ , we add 9 to both sides to get

$3x=21$ .

Dividing both sides by 3 gives

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For the second case, $3x-9=-12$ , we add 9 to both sides to get

$3x=-3$ .

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$x=-1$ .

Checking both cases, we plug in $x=7$ and $x=-1$ .

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For the second case, we have $|3(-1)-9|=|-3-9|=|-12|=12$ , which also satisfies the equation.

This gives us two solutions to the equation; $x=7$ and $x=-1$ .

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2 years ago