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Ne4ueva [31]
3 years ago
11

If f (x) = -2/3x -1 what is the value of f (9)

Mathematics
1 answer:
Readme [11.4K]3 years ago
8 0
I hope this help you. Good luck

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What is the difference between an equation with a variable and an inequality with a variable?
NeX [460]

Answer:

An equation is a statement that maintains the equal value of two mathematical expressions. If the statement is true for all variable values, it is called an identity. ... An equation shows the equality of two variables while an inequality shows the inequality of two variables

7 0
3 years ago
What algebraic expression is equivalent to this expression?<br> 9(2x+6) - 18
Svet_ta [14]

Answer:

18x+36

Step-by-step explanation:

9(2x+6) - 18

Distribute

9*2x + 9 *6 -18

18x +54 -18

Combine like terms

18x+36

3 0
3 years ago
Read 2 more answers
If you draw two cards from the deck at the same time, what is the probability that they will both be hearts?
koban [17]

Answer:

The probability is 1/17.

Step-by-step explanation:

The total number of ways in which 2 cards can be selected from a pack of 52 cards is \binom{52}{2}

The total number of combinations of 2 cards with hearts equals \binom{13}{2}

Thus the probability of the event that both the cards have hearts becomes

P(E)=\frac{\binom{13}{2}}{\binom{52}{2}}=\frac{1}{17}

4 0
3 years ago
Please help best answer will get brainliest
lozanna [386]

Answer:

1/3 renamed: 2/6    Mutiplies of denomonator 3,6,9,12,15,

4/9 renamed : 8/18 Mutiplies of denomonator 9,18,27,36

Step-by-step explanation:

I will help more in the comments sorry I couldn't read it all on here...

4 0
3 years ago
Prove the identity sin4x=2sin2xcos2x
Musya8 [376]
There is a trig identity called the sum of 2 angles for sin its<span>
sin(a+b)=sin(a)cos(b)+cos(a)(sin(b)
</span>
You will need to use it. So in your question split the 4x in 2 equal parts 2x and 2x
 <span>
</span><span>sin(4x)=sin(2x+2x)

</span>Now using the expansion above you will get

<span>sin(2x+2x)=sin(2x)×cos(2x)+cos(2x)×sin(2x)

</span>And it will simplify to 

<span><span>2sin(2x)cos(2x)

I hope this helps you! Good luck :)</span></span>
5 0
3 years ago
Read 2 more answers
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