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Diano4ka-milaya [45]
3 years ago
5

Evaluate the expression. 5 - (-9)

Mathematics
2 answers:
Zina [86]3 years ago
8 0

Answer:

14

Step-by-step explanation:

5 - ( - 9 ) = 5 + 9 = 14

The double negative becomes positive.

-Chetan K

zloy xaker [14]3 years ago
3 0

Answer:

14

Step-by-step explanation:

Because 5-(-9) equals 5-1(-9) and when you multiply two negatives you get a positive, to solve just add 5 and 9

Hope this helps!

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Find the inverse of the function f(x)=4x^3-7​
GuDViN [60]

Answer:

f^-1(x)=³√[(x+7)÷4]

Step-by-step explanation:

f(x)=4x^3-7

y=4x^3-7

interchange 'y' with 'x'

x=4y^3-7

make y the subject

4y^3=x+7

divide by 4 both sides

y^3=(x+7)÷4

multiply by the cube root both sides

³√(y^3)=³√[(x+7)÷4]

y=³√[(x+7)÷4]

f^-1(x)=³√[(x+7)÷4]

8 0
3 years ago
A lottery offers one $900 prize, one $600 Prize, three $400 prizes, and four $100 prizes. One thousand tickets are sold at $5 ea
kap26 [50]

Answer:

Expected value for 4 tickets = $ -7.6

Step-by-step explanation:

Given - A lottery offers one $900 prize, one $600 Prize, three $400 prizes, and four $100 prizes. One thousand tickets are sold at $5 each.

To find - Find the expectation if a person buys four tickets. Assume that the player's ticket is replaced after each draw and that the same ticket can win more than one prize. Round to two decimal places for currency problems.

Proof -

Given that,

A lottery offers

one $ 900 prize

one $ 600 prize

three $ 400 prizes

Four $ 100 prizes

And

One thousand tickets are sold at $ 5 each

Now,

If the person bought 1000 tickets then the prize he gets is

= 900 + 600 + 3×400 + 4×100

= 900 + 600 + 1200 + 400

= $3100

And

The cost of 1000 tickets = 5×1000 = $ 5000

Now,

Price 1 ticket = \frac{3100}{1000} = $ 3.1

⇒Expectation of 1 ticket = $ 3.1 - 5 = $ -1.9      (Here $5 is price of 1 ticket)

⇒Expected value for 4 tickets = $ 4× -1.9 = $ -7.6

⇒Expected value for 4 tickets = $ -7.6

3 0
3 years ago
Need help with these proofs asap i have a 58 in geometry cuz of proofs ;c
shutvik [7]

Sucks for you. nerdddddddddddddddddddddddddd

6 0
3 years ago
Plz plz plz plz help me
kifflom [539]
The colored sheets of paper will cost $1.25 and the package of stickers will cost $3.75. Together before sales tax her total is $5.00.
3 0
3 years ago
What is the discontinuity of the function f(x)=x^2-3x-28/x+4?
Hitman42 [59]

Answer:

Option D is correct that is (-4,-11).

Step-by-step explanation:

We have been given an expression:

f(x)=\frac{x^2-3x-28}{x+4}

We need to find the points of discontinuity

We will first factorize the given expression

\frac{x^2-7x+4x-28}{x+4}

\Rightarrow \frac{x(x-7)+4(x-7)}{x+4}

\Rightarrow \frac{(x+4)(x-7)}{x+4}

Hence, the point of discontinuity is where denominator gives value zero

So, x+4=0\Rightarrow x=-4

Point of discontinuity is -4

hence, after removing the point of discontinuity the function left is:

f(x)=x-7

Hence, put x=-4

f(-4)=-4-7=-11

Therefore, option D is correct that is (-4,-11).

4 0
3 years ago
Read 2 more answers
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