Evaluate the expression.
10x - 3x2 when x = 2

Answers

Answer 1

Answer:

8

Step-by-step explanation:

Answer 2

Answer:8 or -16

Step-by-step explanation:

a) If you mean 10x - 3(x²) when x=2

10(2)- 3(2²)= 20-12=8

b) If you meant 10x - 3x²=

10(2)-(3 x 2)²= 20-6²

20-36=-16


Related Questions

Austen's graduation picnic costs $2 for every attendee. Write an equation that shows the relationship between the attendees x and the cost y.

Answers

Answer:

y=2x

Step-by-step explanation:

x = attendees

y = total of cost for attendees

we know each attendee cost $2 but we don't know how many attendee are there in order to find the total cost y.

Simplify. 3x – 8(x + 4)

Answers

Answer:

-5x - 32

Step-by-step explanation:

Use distributive rule :   a(b + c) = ab + ac

3x - 8(x + 4) =3x + x*(-8) + 4*(-8)

                   = 3x - 8x - 32         {combine like terms}

                    = -5x - 32

1
=
Using two pieces of data from the table below, write the equation of a line in slope-intercept form.
-4
0
4
8
12
29
28
27
26
25
A. y = 4x - 28
B. y = - 4x + 28
OC. y= 3x-28
OD. y=x+28

Answers

Answer:

D

Step-by-step explanation:

The equation of a line in slope- intercept form is

y = mx + c ( m is the slope and c the y- intercept )

Calculate m using the slope formula

m = [tex]\frac{y_{2}-y_{1} }{x_{2}-x_{1} }[/tex]

with (x₁, y₁ ) = (- 4, 29) and (x₂, y₂ ) = (0, 28) ← 2 ordered pairs from the table

m = [tex]\frac{28-29}{0+4}[/tex] = - [tex]\frac{1}{4}[/tex]

The line crosses the y- axis at (0, 28 ) ⇒ c = 28

y = - [tex]\frac{1}{4}[/tex] x + 28 ← equation of line → D

Write an equation in point-slope form of the line that passes through the point (-8,
2) and has a slope of m = 5.

Answers

Answer:

y-2=5(x--8)

Step-by-step explanation:

Formula for point slope form equation: y-y1 = m(x – x1)

After that just plug in the given numbers

Find the value of x for which the lines p and q are parallel.

Answers

Answer:

Do you have a picture of the problem, please?

Step-by-step explanation:

Only then, can I edit this and provide an accurate answer! ;D

Answer:

x=7

Step-by-step explanation:

x=7

Round to the nearest hundred, and then subtract. 4,623- 3,892

Answers

Answer:

700

Step-by-step explanation:4623=4600

3892=3900

4600-3900=700

Answer:

700

Step-by-step explanation:

4623 round to the nearest hundred : 4600

3892 round to the nearest hundred: 3900

4600-3900= 700

Can the number 12 be apart of more than one fact family? Explain.

Answers

Yes, 12 can be a part of more than one fact family because the fact family 3*4 or 6*2 or 9+3.

Yes

3,4
2,6
Hope this Helps:)

Eric's cell phone service costs $40.00 a month for unlimited calls. He also pays $0.02 for each text message he sends.

Which equation represents the total cost, C. in dollars, for a month when Eric sends text messages?

O A C = 40.021

O B C = 40 -0.021

OC C = 0.021 - 40

OD. C = 0.021 + 40

Answers

Answer:

A. 40.021

Step-by-step explanation:

Unlimited calls = $40

Text message = $0.021

NOTE:There is a difference between the value you gave for cost of text messages in the question and the values given in the group of answers. I will use $0.021 for cost of text messages since it is common to all answer choices.

Total cost = Cost of unlimited calls + cost of text messages

C = $40 + $0.021

= $40.021

Therefore, the equation which represent the total cost in dollars for a month is 40.021

A. 40.021

Answer:

he is right^ A.

Step-by-step explanation:

Simplify 4 over quantity 2 plus 7 i

Answers

Answer:

(8-28i)/53

hope it helps!

Step-by-step explanation:

(8-28i)/53 get that a grade! :)))

5). 3x + y = 13
5x - 2y =7
Simultaneous linear equation

Answers

Answer:

Step-by-step explanation:

6x + 2y = 26

5x - 2y = 7

11x = 33

x = 3

3(3) + y = 13

9 + y = 13

y = 4

(3,4)

please help asap! thanks

Answers

Answer:

its the last one i believe

Step-by-step explanation:

because u have to get m by its self so

you divide 5 square from both sides and boom

On highway 77, the Dobson exit is halfway between the Mt. Airy exit and the Elkin exit. If the Elkin exit is located at (-5,-2) and the Dobson exit is located at (-1,4), how far is it from the Elkin exit to the Mt. Airy exit.

Answers

Given :

The Dobson exit is halfway between the Mt. Airy exit and the Elkin exit. If the Elkin exit is located at (-5,-2) and the Dobson exit is located at (-1,4).

To Find :

How far is it from the Elkin exit to the Mt. Airy exit.

Solution :

E(-5,-2) , D(-1 ,4 ) .

It is also given that Dobson exit is halfway between the Mt. Airy exit and the Elkin exit.

Let , location of Elkin exit is A(h,k) .

So , point D in terms of A and E is given by :

[tex](\dfrac{h-5}{2},\dfrac{k-2}{2})[/tex] .

Comparing it with given D :

[tex]\dfrac{h-5}{2}=-1\\\\h=3[/tex] [tex]\dfrac{k-2}{2}=4\\\\k=10[/tex]

Therefore , the location of Mt. Airy exit is ( 3, 10 ) .

Distance between Elkin exit to the Mt. Airy exit.

[tex]D=\sqrt{(5-3)^2+(-2-10)^2}\\\\D=12.17\ units[/tex]

Therefore , distance between Elkin exit to the Mt. Airy exit is 12.17 units .

Hence ,this is the required solution .

The perimeter of the equilateral triangle shown is 67.5 inches. Write and solve an equation to find the value of x.

Answers

Answer:

The answer is 14. Not -14.

Step-by-step explanation:

The value of x for the given triangle will be 14.

What is an expression?

The mathematical expression is the combination of numerical variables and operations denoted by addition, subtraction, multiplication, and division signs.

Mathematical symbols can be used to represent numbers (constants), variables, operations, functions, brackets, punctuation, and grouping. They can also be used to denote the logical syntax's operation order and other properties.

Given that the perimeter of the equilateral triangle shown is 67.5 inches. One side of the triangle is 1.75x - 2.

Perimeter = 3 ( 1.75x - 2 )

67.5 = 5.25x -6

x = ( 73.5 / 5.25 )

x = 14

Therefore, the value of x for the given triangle will be 14.

To know more about an expression follow

https://brainly.com/question/24382052

#SPJ2

Using a spinner, conduct an experiment to compare experimental probability with theoretical probability.

Answers

The probability of an event is a number from 0 to 1 that measures the chance that an event will occur. In this lesson, we will look into experimental probability and theoretical probability.

The following table highlights the difference between Experimental Probability and Theoretical Probability. Scroll down the page for more examples and solutions.

he following table highlights the difference between Experimental Probability and Theoretical Probability. Scroll down the page for more examples and solutions.

Experimental vs Theoretical Probability

How to find the Experimental Probability of an event?

Step 1: Conduct an experiment and record the number of times the event occurs and the number of times the activity is performed.

Step 2: Divide the two numbers to obtain the Experimental Probability

How to find the Theoretical Probability of an event?

The Theoretical Probability of an event is the number of ways the event can occur (favorable outcomes) divided by the number of total outcomes.

Solve the system of equations.
5x – 7y = 58
y = -x + 2

Answers

5x-7y=58

y=-x+2

5x-7(-x+2)=585x+7x-14=5812x-14=5812x=58+1412x=72x=6

5x-7y=58

5(6)-7y=58

30-7y=58

-7y=58-30

-7y=28

y= -4

Answer:

x = 6, y = -4

Step-by-step explanation:

Khan Academy

4(2x – 8) = 3(2 – Зх)​

Answers

8x-32=6-9x
8x+9x=6+32
17x=38
x=38/17

X/2-5=25???????


HELP!!!!

Answers

Answer:

x = 60

Step-by-step explanation:

X/2-5=25

Add 5 to each side

X/2-5+5=25+5

x/2 = 30

Multiply each side by 2

x/2*2 = 30*2

x = 60

Answer:

60

Step-by-step explanation:

x/2 - 5 =25 /×2

x - 10 =50

x=50 +10

x=60

What IS the solution to 1−(13q−5)=−6

Answers

Answer:

q = 12/13

Step-by-step explanation:

Step 1: Write equation

1 - (13q - 5) = -6

Step 2: Solve for q

Distribute -1: 1 - 13q + 5 = -6

Combine like terms: 6 - 13q = -6

Subtract 6 on both sides: -13q = -12

Divide both sides by -13: q = 12/13

Rewrite the function y=3x+8

Answers

Answer:

3x-y= -8

Step-by-step explanation:

i believe this answer is correct

Evaluate f(x) = x2 + 3x − 4 when x = 4:

Answers

Answer:

f(x)=24

Step-by-step explanation:

Replace x in the function with the value 4.

f(4)= (4)^2 + 3(4) - 4  

16 + 12 -4

28 - 4

F(x)= 24

if f(x) = 2x+4 find the values of x so that f(x)=24

Answers

24 = 2x + 4

2x = 20

x = 10

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

stephon scores 75,75,81,95 on four math tests. what is his mean math test score?

Answers

Answer:

should be 81.5

Step-by-step explanation:

Isaac wants to buy tomatoes and a loaf of bread. Tomatoes are $1.20 A pound, and a loaf of bread is $2.00. he has $8.00 to spend. How many pounds of tomatoes can he buy? Write the equality to solve the problem let X be the number of pounds of tomatoes.

Answers

Answer:

5 pounds of tomatoes

Step-by-step explanation:

5 pounds of tomatoes

8-2=6

6/1.20=5

8x^2+5=22x Need help learning factoring please put work so I can understand

Answers

Answer: (2x - 5) • (4x - 1)

STEP 1 : Equation at the end of step 1

(23x2 - 22x) + 5

STEP 2 : Trying to factor by splitting the middle term

2.1 Factoring 8x2-22x+5

The first term is, 8x2 its coefficient is 8 .

The middle term is, -22x its coefficient is -22 .

The last term, "the constant", is +5

Step-1 : Multiply the coefficient of the first term by the constant 8 • 5 = 40

Step-2 : Find two factors of 40 whose sum equals the coefficient of the middle term, which is -22 .

-40 + -1 = -41

-20 + -2 = -22 That's it

Step-3 : Rewrite the polynomial splitting the middle term using the two factors found in step 2 above, -20 and -2

8x2 - 20x - 2x - 5

Step-4 : Add up the first 2 terms, pulling out like factors :

4x • (2x-5)

Add up the last 2 terms, pulling out common factors :

1 • (2x-5)

Step-5 : Add up the four terms of step 4 :

(4x-1) • (2x-5)

Which is the desired factorization

Final result : (2x - 5) • (4x - 1)

HELP ME PLZ!!!! I'LL DO ABSOLUTELY ANYTHING, AND I MEAN ANYTHING!!!!!!

Answers

The answer is this below:

xyxyxy. X. 7x xtimesxtimes.
Yxyxy

Thats how the problem would look like

what is 64,100,000,000,000 in scientific notation ANSWER ASAP

Answers

Hey there!☺

[tex]Answer:\boxed{6.41*10^{13}}[/tex]

[tex]Explanation:[/tex]

[tex]64,100,000,000,000[/tex] as a scientific notation would be written like this:

[tex]{6.41*10^{13}}[/tex]

Hope this helps!

Solve the equation. 5+4x-7=4x-2-x​

Answers

answer
4x-4x+x=-2+7-5
x=0

Please Help!! 10 points! Brainliest Answer! 2 questions

Answers

Answer:

D and C

Step-by-step explanation:

I’m not sure but i think is D, since rise is y and run is x

Miracle sells 28 dozens of donuts on Wednesday. Each dozen cost $18. How much is one
donut?
2

Answers

Answer:

$1.5

Step-by-step explanation:

if each dozen cost $18, we need to divide.......18/12........because 12 is a dozen.

18/12 = 1.5

Plzzz help!!!! DUE TODAY!!!!! IM DESPERATE!!! WILL GIVE BRAINLIEST!!!!!! Use the values x=−0.5, 0, 1 to prove your solution to the equation 5+x−12=2x−7. In your final answer, include all of your calculations.

Answers

5+x-12=2x-7

x=0.5

5+0.5-12=2(0.5)

Get math away! That app saved me for questions like that :/
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