1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Wewaii [24]
2 years ago
7

Simplify 9+ (-2)^3 HELP PLEASE

Mathematics
2 answers:
Oliga [24]2 years ago
8 0

Answer:

1

Step-by-step explanation:

Raise -2 to the power of 3 = -8

9-8= 1

Mila [183]2 years ago
7 0

Answer:

1

Step-by-step explanation:

A number raised to the 3rd power is equal to that number multiplied by itself twice. Below I have expanded the expression to visualize this process. If this makes it more confusing, the main way is just to go from line 1 to line 4.

9 + (-2)³                          <---- Original expression

9 + (-2 x -2 x -2)             <---- (-2)³ expanded

9 + (4 x -2)                     <---- -2 times -2

9 + (-8)                           <---- 4 x -2                    

1                                     <---- 9 - 8

You might be interested in
Explain what the FIRST STEP is to solve a system of equations like the one below algebraically.
sergij07 [2.7K]

Answer:

transposition method

Step-by-step explanation:

it helps to find that value of y

7 0
3 years ago
True or False
Alja [10]

Step-by-step explanation:

Q1)

for x = 2, y = 1

-8x³y⁴/7 = -64/7

-8×2³×1⁴/7 = -8×8×1/7 = -64/7

true

Q2)

x/4 + x/6 - x/2 = 3/4

is x = -9 ?

bringing everything to 1/12 ...

3x/12 + 2x/12 - 6x/12 = 3×3/12

-x/12 = 9/12

-x = 9

x = -9

true

Q3)

can

1 - 2ab - (a² + b²) = 1 - 2ab - a² - b² be factored as

(1 + a - b)(1 + a + b)

let's multiply

(1 + a - b)(1 + a + b) =

= 1 + a + b + a + a² + ab - b - ab - b² =

= 1 + 2a + a² - b²

this is NOT the same as

1 - 2ab - a² - b²

false

Q4)

The horizontal distance of a point from the y-axis is called abscissa or x coordinate of the point.

3 is the y coordinate of (2, 3) and not the x coordinate.

false

Q5)

(7, 9) and (9, 7)

the x coordinates are different, and the y coordinate are different. so, they are definitely NOT the same point.

this would be like saying 5 hours and 3 minutes is the same as 3 hours and 5 minutes.

false

Q6)

now, this is tricky. there are 4 perfect cubes between 1 and 100 :

1×1×1 = 1

2×2×2 = 8

3×3×3 = 27

4×4×4 = 64

did your teacher mean "exactly 3 perfect cubes" ? because, since there are 4, there are also 3, of course (and 2, and 1).

and did "between 1 and 100" mean including the numbers 1 and 100, or excluding the numbers 1 and 100 ?

so, if excluding 1 and 100, then it is true.

if including 1 and 100 and asking for exactly 3, then it is false.

if including 1 and 100 and truly only asking for 3, then it is true.

Q7)

12³ = 12×12×12 = 144×12 = 1728

true

Q8)

(a+1)(a-1)(a²+1) = (a⁴ -1) ?

let's multiply

(a² + a - a - 1)(a² + 1) = (a²-1)(a²+1) = a⁴ - a² + a² - 1 = a⁴-1

true

Q9)

the areas of the 2 squares are

25a² and 25b²

the sum is

25a² + 25b² = 25(a² + b²)

but

25(a+b)(a-b) = 25(a² - b²)

this is NOT the same.

false

Q10)

abc + bca + cba

a monomial is, roughly speaking, a polynomial which has only one term.

but the given expression has 3 terms.

false

8 0
2 years ago
Maria is planning to attend UCLA. She is curious what the average age of UCLA students is. Since most students that attend UCLA
RoseWind [281]

Answer:

Yes

We fail to reject the alternative hypothesis Hₐ < 30, that is the average age of students is less than 30

Step-by-step explanation:

Yes because, there is an average age of a sample which can be tested against a null hypotheses

We put

Null hypothesis as H₀ = 30

The alternative hypothesis as Hₐ < 30

We have

z=\frac{\bar{x}-\mu }{\frac{\sigma }{\sqrt{n}}}

With

\bar x = 29

μ = 30

σ = 5.2

n = 65

α = 10%

We have

Here we have z = -1.55 and critical z = -1.28

Which gives a critical \bar x of 29.83 with the probability P = 0.061 < 0.1 Hence we reject the null hypothesis as there is sufficient evidence to suggest that the average age is less than 30 years.

8 0
3 years ago
Can you add a negative and positive fraction or do you have to subtract it?
KengaRu [80]

Answer:

Hi

Step-by-step explanation:

You have to subtract it because you add a negative and positive fraction together you can add a positive with a positive or vice versa but you can add n and p together so you have to subtract.

Hope it helps

6 0
2 years ago
proszę o pomocy bardzo, lepej żeby było szybko, mam kartkówkę. Pytanie: wyznacz współrzędne i długość wektora AB jeżeli A(-3,-1)
IgorLugansk [536]

Answer:

Opps I don't know your language sorry

6 0
3 years ago
Other questions:
  • Which is a rule to describe this transformation
    10·2 answers
  • Plz help A lunch counter sells two types of sandwiches, roast beef and chicken salad. The profit on the sandwiches is $2 for chi
    8·2 answers
  • The weights of the fish in a certain lake are normally distributed with a mean of 11 lb and a standard deviation of 6. if 4 fish
    8·1 answer
  • A cone has a volume of 12 cubic inches. What is the volume of a cylinder that the cone fits exactly inside of?
    9·1 answer
  • PlZZZ help picture attached
    10·2 answers
  • At an electronics store, the price of a tablet is marked down 15% to $212.50. What was the price of the tablet before the markdo
    13·2 answers
  • Which statement is true about the function f(x) minus the square root of x
    11·1 answer
  • Which properties are present in a table that represents a logarithmic function in the form y=log8^(x) when b&gt;1 I. The y-value
    5·2 answers
  • There are currently 17 frogs in a (large) pond. The frog population grows exponentially, tripling every 6 days. How long will it
    5·1 answer
  • Of the volume of a cube is 64cm^2 find its length​
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!