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Tanzania [10]
4 years ago
14

Exact value of the function for the given x-value f(x) = 5x for x = -1

Mathematics
1 answer:
fgiga [73]4 years ago
3 0
-5, because when plugging the -1 in for x then multiplying it by 5, you get -5
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How can you tell if an inequality will have a solid line
Virty [35]

Answer:

b. the symbol has or equal to

Step-by-step explanation:

Required

When does an inequality have a solid line

The question is pretty straightforward and the answer is (b) which means that when the symbol has or equal to.

This implies that, the symbol could be:

> or = i.e. \ge

and it could also be:

< or = i.e. \le

Take for instance:

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<em>The above expressions will have a solid line</em>

6 0
3 years ago
Simplify to lowest form.<br> a. 1/2 + 3/2 = ?<br><br> b. 2/5 + 3/5 = ?
forsale [732]
For letter the answer is 2

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3 years ago
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Help with 21 would be much appreciated.
umka2103 [35]

Answer:

\large\boxed{x=2\sqrt{21}\ and\ y=4\sqrt3}

Step-by-step explanation:

Look at the picture.

ΔADC and ΔCDB are similar. Therefore the sides are in proportion:

\dfrac{AD}{CD}=\dfrac{CD}{DB}

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AD=14-8=6\\CD=y\\DB=8

Substitute:

\dfrac{6}{y}=\dfrac{y}{8}         <em>cross multiply</em>

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y^2=48\to y=\sqrt{48}\\\\y=\sqrt{16\cdot3}\\\\y=\sqrt{16}\ cdot\sqrt3\\\\\boxed{y=4\sqrt3}

For x use the Pythagorean theorem:

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3 0
3 years ago
Directions - Identify the key components, create an exponential equation, then answer the questions.
Tamiku [17]

Answer:

Directions - Identify the key components, create an exponential equation, then answer the questions.  

​Exponential Form:  y=a\cdot b^{x},\ a\ is\ the\ \textit{starting}\ \textit{value},\ b\ is\ the\ base\ (rate).\y=a⋅b  

x

, a is the starting value, b is the base (rate).  

​In a small town, the stray dog population is rapidly increasing. there are currently 15 stray dogs, and it is estimated that the population will triple every year. How many dogs will there be after 1 year? 2 years? 3 years?

​

​1) a =  15  

 4) Dogs after 1 years = 45  

 ​

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​3) Equation:    

y= 15 ×3x

 ​6) Dogs after 3 years =    

405

 

Step-by-step explanation:

8 0
3 years ago
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