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
Romashka-Z-Leto [24]
4 years ago
12

Evaluate -2x square y, if x= -3 and y = -1

Mathematics
2 answers:
statuscvo [17]4 years ago
8 0

Answer:

18

Step-by-step explanation:

Write the expression

-2x²y

substitute the real values with x=-3 and y= -1

-2(-3²)×(-1)

-2(9)×(-1)

-18×-1

18

ANTONII [103]4 years ago
4 0

the answer is 18

-2x^2y

-2(3)^2(-1)

-2(9)(-1)

-18(-1)

18

You might be interested in
Azizza has $987 in her savings account. If the bank pays 2% interest per year on savings, how much interest does she earn in one
UkoKoshka [18]

Answer:

$19.74

Step-by-step explanation:

$987 x .02 = $19.74

4 0
3 years ago
A portion of the graph of f(x) = −x2 − 2x + 8 is shown. Which of the following describes all solutions for f(x)?
Naily [24]

Answer:

(x,-x^2-2x+8) where −5 ≤ x ≤ 3

Step-by-step explanation:

The given function is f(x)=-x^2-2x+8.

We want to select the option that describes all the solutions to the parabola.

The domain of the parabola is −5 ≤ x ≤ 3.

This means that  any x=a on −5 ≤ x ≤ 3 that satisfies (a,f(a)), is a solution.

This can be rewritten as (a,-a^2-2a+8)

Therefore for x belonging to −5 ≤ x ≤ 3, all solutions are given by:

(x,-x^2-2x+8) where −5 ≤ x ≤ 3.

7 0
4 years ago
Pollsters regularly conduct opinion polls to determine the popularity rating of the current president. Suppose a poll is to be c
Lisa [10]

Answer:

a. The relevant population is all the citizens of the country

b. The variable of interest is about whether the president is doing a good job or bad job. It is qualitative

c. The sample data is the 7,500 citizens randomly selected by random-digit telephone dialing

d. The inference of interest to the pollster is whether the citizens think the president is doing good or bad

e. The method of data collection is survey.

Step-by-step explanation:

6 0
3 years ago
Which equation represents the line through (0,0) and (3,4)? a. y=3/4x b.y=4/3x c.y=4x d.y=3x
love history [14]

Answer:

b

Step-by-step explanation:

The equation of a line passing through the origin is

y = mx ( m is the slope )

Calculate m using the slope formula

m = \frac{y_{2}-y_{1}  }{x_{2}-x_{1}  }

with (x₁, y₁ ) = (0, 0 ) and (x₂, y₂ ) = (3, 4 )

m = \frac{4-0}{3-0} = \frac{4}{3}

y = \frac{4}{3} x → b

3 0
3 years ago
Use a graphing calculator to approximate the vertex of the graph of the parabola defined by the following equation. y=x^2+x+6
serious [3.7K]

Answer:

<em>Vertex; ( - 1 / 2, 5 3/4 )</em>

Step-by-step explanation:

No need for a calculator, take a look at the procedure below;

The vertex of an up - down facing parabola of the form y = ax^2 + bx + c is x = -b / 2a;

The parabola params are given to be 1, 1, and 6, such that;

x = - 1 / 2 * 1,

x = - 1 / 2,

Now plug in this value of x into the quadratic function as to solve for y;

y = ( - 1 /2 )^2 - 1 /2 + 6,

y = 1 / 4 + 5 1 / 2,

y = 5 3/4

Thus the vertex has a minimum of ( - 1 / 2, 5 3/4 ),

<em>Vertex; ( - 1 / 2, 5 3/4 )</em>

7 0
3 years ago
Read 2 more answers
Other questions:
  • Jessica started a holiday saving account with a $50 deposit.She added $25 per week for 7 weeks. What was her account balances at
    14·1 answer
  • Use technology to solve for x. 3^x - 4= 6x - 7
    10·1 answer
  • Jogging shoes listed at $70 were on sale for $45 what percent of the regular price for soup
    15·1 answer
  • Which answer choice is equivalent to 4(2x + 7) ?<br><br><br> 8x + 7<br> 36x<br> 84+ 28<br> 15x
    14·1 answer
  • An expression must have a monomial of degree 2 or higher to be a polynomial.
    13·1 answer
  • What is y+2=⅞(x-3) in standard form?
    5·2 answers
  • What is the range of P=3,000(1/1,000)
    13·1 answer
  • What is the solution to the system below? <br> y = 5x - 9<br> y = x + 3
    5·1 answer
  • Um whats x³+3x²+3x+1
    5·1 answer
  • Solve the equation 1/3 ÷ 6. SHOW YOUR WORK.
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!