Evaluate the expression when x=-4.
x2 +7x-6

Answers

Answer 1
•(-4)^2 + 7(-4) -6
• -18
Answer 2
-4x2 + 7x-4-6
-8+ -34
-42
I think this is right lol

Related Questions

how do I write an equation in standard form with the points (3,3) (0,-3) (2,-3)

Answers

First:
-3-3= -6 2-3=-1
-6/-1=6

Y=6x+b
3=6 x 3
3=18

Subtract both sides by 18

B=-15

Answer= y=6x-15

A farm has 56 horses and sheep in all. There are 8 fewer sheep than horses. How many horses are there on the farm?

Answers

Answer:

32 Horses

Step-by-step explanation:

32-8=24

There are 32 horses and 24 sheep (As you can see there are 8 fewer sheep than horses)

I sort of guess and checked:

I tried to think of 2 numbers that added to 56 but one number was 8 less than the other one.I figured out that 32 and 24 fit this description :)

An electronic store sold 6% of the cell phones that were on sale. If only 21 cell phones were sold,

how many cell phones were not sold? Write an equation to solve.

Select the correct choice below and fill in the answer box to complete your choice.

(Type a whole number.)

O A. 21x=0.06; x = 0.06=21; x =

OB. 0.06x = 21; x = 21 -0.06; X=

OC. X=0.06 = 21; x = 21 x 0.06; X=

OD. X-(21 -0.06) = 21; x = 21+ (21 -0.06); x =

There were

cell phones not sold.

(Type a whole number.)

Answers

Answer:

The answer is below

Step-by-step explanation:

Let x represent the number of phones that were on sale, given that 6% of the cell phones that were on sale, therefore:

number of cell phones sold = 6% of x = 0.06 × x = 0.06x

21 phones were sold, hence:

0.06x = 21

x = 21/0.06

x = 350 phones

This means that 350 cell phones were on sale.

Number of cell phones not sold = total number of cell phones that were on sale - number of cell phones sold

Number of cell phones not sold = 350 - 21

Number of cell phones not sold = 329

Select the correct answers.

Mila is at a flea market. She has $50 in her wallet. She decides that she will spend $15 on jewelry, $20 on a pair of jeans, $5 on a T-shirt, and $10 on something to eat. She likes a one-of-a-kind T-shirt, but the seller is not ready to sell it for less than $8. She thinks of five ways to deal with this situation. Which two choices indicate a trade-off?

She will try to find another seller selling the T-shirt for a lower price.

She will give up on the T-shirt and use the money to buy better jeans.

She will use some of the money she received from her aunt on her birthday.

She will pay the seller $5 and promise to pay the remainder on another day.

She will buy the T-shirt for $8 and not order juice at lunch.


Answers

Answer:

1and3

Step-by-step explanation:

the temperature at noon was -3°C. By 10 Pm on the same day the temperature decrease by 5.4° what was the temperature at 10 pm​

Answers

Answer:

-8.4

Step-by-step explanation:

Answer:

Probbly -8.4

Step-by-step explanation:

How many people are in the set Cn D?
4
6
36
38

Answers

Answer: A.) 4 people

Step-by-step explanation:

Find the value of x.

Answers

Answer:

12

Step-by-step explanation:

1. the rule: 3:6=6:x;

2. if 3/6=6/x, then x=12.

6th grade math I mark as brainliest

Answers

The answer is 9 hope this helps

The theory that it is reasonable to chose the simpler theory when choosing between two competing theories of equal explanatory value is

Answers

Answer:

Occam’s razor theory.

Step-by-step explanation:

This theory is known as Occam’s razor theory.

It's a theory based on the principle whereby we give precedence to simplicity. It states that out of two competing theories, the one with the simpler explanation of an object should be embraced over the other. The reason is that the philosopher William of Ockham said that "objects are not meant to be multiplied beyond absolute necessity.”

This definition resonates with what is explained in the question.

Thus, the theory is as explained.

suppose the retail price of an automobile is $28,000 in 1998 and that it increase at 3% per year. a) write a equation exponential function y=a(1 +r) b) use the model to predict the retail of the automobile in 2016

Answers

Answer:

......................................

What are the true and false statements for If two planes intersect, then their intersection is a line. Include converse, inverse and contrapositive.

Answers

Answer and Step-by-step explanation:

Solution:

Statement:

If two planes intersect  their intersection is a line.

Suppose that

P =if two planes intersect.

q = then their intersection is line.

¬p = if two planes do not intersect.

¬q = then their intersection is not a line.

Converse:

If two planes intersect their intersection is a line.

P → q

Inverse:

If two planes do not intersect, then their intersection is not a line.

¬p → ¬q

Contrapositive:

If two planes intersection is not a line, then they do not intersect.

¬q → ¬p

Does anyone have the answer?

Answers

Answer:

hi to what. good bye???????

What is the leading coefficient of a third degree polynomial function that has an output of 1,272 when x=2, and has zeros of −6, 7i, and −7i?

Answers

Answer:

The leading coefficient is 3

Step-by-step explanation:

Polynomials

Given the roots of a polynomial x1,x2,x3, it can be expressed as:

[tex]p(x)=a(x-x1)(x-x2)(x-x3)[/tex]

Where a is the leading coefficient.

We are given the roots x1=-6, x2=7i, x3=-7i, thus:

[tex]p(x)=a(x+6)(x-7i)(x+7i)[/tex]

Operating the product of the conjugated imaginary roots:

[tex]p(x)=a(x+6)(x^2+49)[/tex]

Knowing p(2)=1,272 we can find the value of a

[tex]p(2)=a(2+6)(4+49)=1,272[/tex]

Operating:

[tex]a(8)(53)=1,272[/tex]

[tex]424a=1,272[/tex]

Solving:

[tex]a=1,272/424[/tex]

a=3

The leading coefficient is 3

Answer:

3

Step-by-step explanation:

If 10% of x is 20, what is 23% of x? A. 33 B. 46 C. 200 D. 230

Answers

The correct answer is B

Answer:

B. 46

Step-by-step explanation:

20*10=200

200*0.23=46

if you can help would that would be amazing

Answers

Answer:

yes for the first one

because if you take number one for an example and use it for y

1^7*1^7*1^7=1 and 1^7*7*7=1

they both equal one

2.) [tex]\sqrt{x}[/tex]

[tex]\sqrt[3]{x}\sqrt[6]{x}=\:x^{\frac{1}{3}}x^{\frac{1}{6}}=\:x^{\frac{1}{3}+\frac{1}{6}}[/tex]

[tex]=x^{\frac{1}{3}+\frac{1}{6}}[/tex]

join 1/3+1/6= 1/2

then you get the answer

[tex]\sqrt{x}[/tex]

Step-by-step explanation:

brainlist pls:>

A bookshelf at a bookstore is 3 feet 9 inches wide. There are 18 copies of the same book on the shelf, which fit the shelf exactly. What is the width of 1 of the books?

Answers

Answer:

2.5 inches

Step-by-step explanation:

Given

Shelf Width = 3ft 9in

Copies = 18

Required

Determine the width of each book

This is calculated by dividing the shelf width by the number of copies.

Width = Shelf Width ÷ Copies

Width = (3 ft 9in) ÷ (18)

[Convert with to inches]

Width = (3 * 12 + 9) ÷ (18)

Width = (36 + 9) ÷ (18)

Width = 45 ÷ 18

Width = 2.5 inches

Hence, the width of each book is 2.5inches

Describe the similarities and differences between a bar graph and a histogram.​

Answers

Answer:

Bar graphs are used with nominal or ordinal scores; histograms are used with interval or ratio scores.

Step-by-step explanation:

Solve the following system of equations for X..
3x – 2y = 8
2x + 2y = 7
Help
A)3
B)-3
C)15
D)1

Answers

Answer:

x  =  3

Step-by-step explanation:

Solve for the first variable in one of the equations, then substitute the result into the other equation.

X would be -3so therefore it’s x-3

Explain what the quote means please.
"In today's competitive job market, it's important to realize that finding a job is in itself a full-time job."

Answers

Because it really hard to find a job when there’s a lot of other people lookin to get the same job

This quote means that finding a job is a tough task and it takes much time, due to competition.

What is a job market?

The job market refers to the state of employment opportunities. It is conditions for job seekers in a particular industry, geographic region, or overall economy.

It includes factors such as the demand for labor, the number of available job openings, the qualifications required for those jobs, and the compensation and benefits offered to employees.

The job market can vary depending on economic conditions, industry trends, and government policies, among other factors. Job seekers and employers both use the job market to evaluate the availability and competitiveness of employment opportunities. Finding a job is a tough task.

Learn more about job markets, here:

https://brainly.com/question/14662793

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All lines parallel to AB

Answers

Answer:

2X-1

Step-by-step explanation:

Answer:

fg

Step-by-step explanation:

just did the test

A company sells widgets. The amount of profit, y, made by the company, is related to the selling price of each widget, x, by the given equation. Using this equation, find out what price the widgets should be sold for, to the nearest cent, for the company to make the maximum profit.
y=-10x^2+600x-3588
y=−10x
2
+600x−3588

Answers

Answer:

Step-by-step explanation:

The maximum profit will be found in the vertex of the parabola, which is what your equation is. You could do this by completing the square, but it is way easier to just solve for h and k using the following formulas:

[tex]h=\frac{-b}{2a}[/tex] for the x coordinate of the vertex, and

[tex]k=c-\frac{b^2}{4a}[/tex] for the y coordinate of the vertex.

x will be the selling price of each widget and y will be the profit. Usually, x is the number of the items sold, but I'm going off your info here for what the vertex means in the context of this problem.

Our variables for the quadratic are as follows:

a = -10

b = 600

c = -3588. Therefore,

[tex]h=\frac{-600}{2(-10)}=30[/tex] so the cost of each widget is $30. Now for the profit:

[tex]k=-3588-(\frac{(600)^2}{4(-10)})[/tex] This one is worth the simplification step by step:

[tex]k=-3588-(\frac{360000}{-40})[/tex] and

k = -3588 - (-9000) and

k = -3588 + 9000 so

k = 5412

That means that the profit made by selling the widgets at $30 apiece is $5412.

Hence,the profit made by selling the widgets at $[tex]30[/tex] apiece is $[tex]5412[/tex].

What is the maximum profit?

Maximum profit, or profit maximisation, is the process of finding the right price for your products or services to produce the best profit.

Here given that,

A company sells widgets. The amount of profit, [tex]y[/tex], made by the company, is related to the selling price of each widget, [tex]x[/tex], by the given equation.

As the maximum profit found in the vertex of the parabola,

Here, [tex]x[/tex] will be the selling price of each widget and [tex]y[/tex] will be the profit.

The number of items sold is [tex]x[/tex].

So, the quadratic equation is:-

[tex]a = -10b = 600c = -3588.[/tex]

Therefore, so the cost of each widget is $[tex]30[/tex].

For the profit:-

[tex]k = -3588 - (-9000) andk = -3588 + 9000 sok = 5412[/tex]

Hence,the profit made by selling the widgets at $[tex]30[/tex] apiece is $[tex]5412[/tex].

To know more about the maximum profit

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Fraction Multiplication and División:Question 4
Tina has $72 to spend on new t-shirts. If each t-shirt costs $12,
how many different t-shirts can Tina buy? Set up a fraction to
determine how many t-shirts Tina can buy. Then solve.

Answers

Answer: 6 T-shirts

Step-by-step explanation:72/12=6

Simplify the expression 4x+3(5y+x

Answers

Answer:

Step-by-step explanation:

4x + 3(5y + x)

= 4x (5y + x) + 3 (5y + x)

= 20xy + 4x² + 15y + 3x

The width of a rectangle
is 11 feet longer than the
length. The perimeter of the
rectangle is 70 feet. Find
the length and the width

Answers

Answer:

Hello! The answer to this problem is Length= 27 and Width= 8

Step-by-step explanation:

2(11+2x) +2x = 70

6x + 22 = 70

6x = 48

x = 8

In a study using 50 foreign-language vocabulary words, the learning rate L (in words per minute) was found to depend on the number of words already learned, x, according to the equation L(x) = 20 – 0.4x

Answers

Here is the complete question

1. State coordinates of x axis

2. State coordinates of y axis

3. State the slope

4. Graph the function

5. Is learning rate increasing or decreasing?

Answer:

1. (50,0)

2. (0,20)

3. Slope = -0.4

4. Check attachment for graph

5. Learning rate is decreasing

Step-by-step explanation:

1.

L(x) = 20-0.4x

20 = 0.4x

x = 20/0.4

x = 50

(50,0)

2

For y coordinate;

L(0) = 20-0.4(0)

= 20

(0,20)

3.

Slope,

Y = -0.4x+20

We compare with

Y = mx+c

m = -0.4

Intercept c = 20

4. Check attachment

5. The slope is negative at m = -0.4 therefore the rate of learning is on a decline. As number of words learnt increases, learning rate falls.

Answer:

Step-by-step explanation:

Anyone know this because I need help !!!!

Answers

Answer: 90 clockwise rotation

Step-by-step explanation:

you can take any point and replace its (x,y) to (y,-x) otherwise called the 90 clockwise conversion and it will map figure C onto figure C'

How do we know if a function is a parabola like for instance, this one x^2 + x?

Answers

There is an easy way to tell whether the graph of a quadratic function opens upward or downward: if the leading coefficient is greater than zero, the parabola opens upward, and if the leading coefficient is less than zero, the parabola opens downward.

cuál es el denominador común de las fracciones?​

Answers

Answer:

?????????????????????????

Step-by-step explanation:

In a study by Peter D. Hart Research Associates for the Nasdaq Stock Market, it was
determined that 20% of all stock investors are retired people. In addition, 40% of all U.S. adults invest in mutual funds. Suppose a random sample of 25 stock investors is taken What is the probability that fewer than 4 are retired people

Answers

Answer:

a) 0.1108

(b) 0.0173

Step-by-step explanation:

We are given that 20% of all stock investors are retired people. A random sample of 25 stock investors is taken.

Firstly, the binomial probability is given by;

where, n = number of trails(samples) taken = 25

r = number of successes

p = probability of success and success in our question is % of

retired people i.e. 20%.

Let X = Number of people retired

(a) Probability that exactly seven are retired people = P(X = 7)

P(X = 7) =

= = 0.1108

(b) Probability that 10 or more are retired people = P(X >= 10)

P(X >= 10) = 1 - P(X <= 9)

Now, using binomial probability table, we find that P(X <= 9) is 0.98266 at n = 25, p = 0.2 and x= 9

So, P(X >= 10) = 1 - 0.98266 = 0.0173.

A sinking fund is established to discharge a debt of $30,000 in 5 years. If deposits are made at the end of each 6-month period and interest is paid at the rate of 4%, compounded semiannually, what is the amount of each deposit?

Answers

Answer:

what you have to do is do 30000 * 5 and then do 6 divided by the number and then four times that number and whatever the answer you get be your answer hope this help

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