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tatiyna
3 years ago
5

Help help ASAP math math

Mathematics
2 answers:
vitfil [10]3 years ago
8 0

Answer:

-1/1

Step-by-step explanation:

=64/-8

over

36-30+2

= -8

over

8

= -1

over

1

Vadim26 [7]3 years ago
8 0

Answer:

\rightarrow - 1

Step-by-step explanation:

\rightarrow  \frac{ {4}^{3} }{ \frac{ - 12 +  {2}^{2} }{(2 \times 3) {}^{2} + ( - 5 \times 2 \times 3) + 2 }}  \\

\rightarrow  \frac{ {4}^{3} }{ \frac{ - 12 +  {2}^{2} }{  {6}^{2} +   (  - 30) + 2 }}  \\

\rightarrow  \frac{ 64 }{ \frac{ - 12 +  4 }{  36 +   (  - 30) + 2 }}  \\

\rightarrow  \frac{ 64 }{ \frac{ - 8 }{ 8 }}  \\

\rightarrow   -  \: \frac{ 64 }{ \frac{  8 }{ 8 }}  \\

\rightarrow   - \frac{  8 }{ 8 }  \\

\rightarrow \:  - 1

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Find the difference, –8 – (–5). Then check your work by writing the equivalent addition sentence.
pav-90 [236]

Answer:

-3

Step-by-step explanation:

double negative = positive so the equation turns into -8+5. add 5 by going 5 spaces closer to 0 on a number line. the answer is -3.

another equation is -3-5=-8

hope this helped! =)

4 0
2 years ago
Penelope invested 60% of her retirement account in stocks and 40% in gold. Penelope believes that the return to stocks over the
hjlf

Answer:

1) mean = 21, standard deviation σ = 21.9317

2) the probability that Penelope's portfolio will earn at least 12% in the next 12 months is 0.6591

Step-by-step explanation:

 Given the data in the question;

1. According to Penelope's beliefs, what are the mean rate of return and the standard deviation of return of her portfolio?

Mean μ = Return = ( 60% × 15) + ( 40% × 30 ) = 9 + 12 = 21

mean = 21

standard deviation σ = √( (0.6² × 25²) + ( 0.4² × 40² ) )

standard deviation σ = √( (0.36 × 625) + ( 0.16 × 1600 ) )

standard deviation σ = √( 225 + 256 )

standard deviation σ = √481

standard deviation σ = 21.9317

2)  What is the probability that Penelope's portfolio will earn at least 12% in the next 12 months

so we are to find P( X > 12 )

converting into standard normal variable;

⇒ P( Z  > X-μ  / σ  )

= P( Z  > ( 12-21  / 21.9317  ) )

= P( Z  > ( -9 / 21.9317  ) )

= P( Z  > -0.41 )  

FROM z-score table; P( Z  > -0.41 ) is 0.3409

P( X > 12 ) = 1 - 0.3409

P( X > 12 ) = 0.6591

Therefore,  the probability that Penelope's portfolio will earn at least 12% in the next 12 months is 0.6591

3 0
3 years ago
How do you graph x-y=1 and 3x+2y=-12
Nataliya [291]

Answer:

Graph the equations

Step-by-step explanation:

x - y = 1

3x + 2y = - 12

Rewrite equations into y=mx+b form:

y = -1 + x

y = -6 - 1.5x

Graph it!

3 0
3 years ago
(Geometry), homework please help
Morgarella [4.7K]

4.That first one sounds familiar; I think I did it yesterday.


The sides don't matter (except that they're equal) so the base angle b satisfies


b + b + 38 = 180


2b = 142


b = 71


Choice a




5.


42 + 42 + v = 180


v = 180 - 84 = 96


choice d


6. That's three acute angles, an acute triangle


7. We need to satisfy the triangle inequality which means the sum of the two smaller sides needs to be bigger than the largest


10+15>24 so choice b


8.


SRT = RTS = 180 - STU


3x - 50 = 180 - 7x


10 x = 230


x = 23


choice a



3 0
3 years ago
B. Compare in hours: 27 hours to 3 days. Write the ratio as a fraction in lowest terms.
Helga [31]

Answer:

Reduced fraction:

3 over 8

Step-by-step explanation:

Divide both the numerator and denominator by the GCD

27 ÷ 9

72 ÷ 9

7 0
4 years ago
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