Mathematics High School

Simplifying Polynomials
5) What is the area of a rectangle with side lengths of 3x - 8 and x + 2?
A. 3x² – 2x – 16
B. 3x² + 14x – 16
C. 4x – 6
D. 4x + 10


Answers

Answer 1

Answer:

A

Step-by-step explanation:

Area of a rectangle =

[tex](3x - 8)(x + 2) = 3x {}^{2} + 6x - 8x - 16 \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: = 3x {}^{2} - 2x - 16[/tex]

Hence, we choose A.

Related Questions

Intercepts:
Write the ordered pair describing the coordinates of each intercept.
1. x-intercept: -6 2. y-intercept: -2.3 3. y-intercept: 3/4


Find the x-intercept and y-intercept for the graph of each equation.
4. y = 3x – 9 5. y = 5x + 10 6. y=1/2 x+4





7. y = 12 – 6x 8. 2y = -6x + 8





Use the x-intercept and y-intercept to graph each equation.
9. y=-1/2 x-3 10. y = 2x + 4

x-intercept: ______ x-intercept: ______

y-intercept: ______ y-intercept: ______






Graph your answers from #4 and #8 from above.
11. y = 3x – 9 12. 2y = -6x + 8

Answers

An x-intercept is the point where the function passes the x axis at y=0.
The y-intercept is the point where the function crosses the y axis at x=0

1. It is an x-intercept, so y = 0. The ordered pair would be (-6, 0)
2. It is a y-intercept, so x = 0. The ordered pair would be (0, -2.3)
3. It is a y-intercept, so x=0. The ordered pair would be (0, 3/4)

To find the x-intercept, set y = 0. To find the y-intercept, set x=0

4. y-intercept: y = 3(0) -9. y = -9 The y-intercept is at (0, -9)
x-intercept: 0 = 3x -9. 9 = 3x. x = 3. The x-intercept is at (3, 0)

5. x intercept: 0 = 5x +10. -10 = 5x. x = -2. The x-intercept is at (-2, 0)
y-intercept: y = 5(0) + 10. y = 10. The y-intercept is at (0, 10)

If you look at finding the y-intercepts in the two problems above, you may see there is a pattern forming. The y-intercept is the number that your adding or subtracting that is located after the x (ex. y = 4x - 2 - the y-intercept would be -2)

9. First, find the x and y-intercepts. The y intercept is -3 You’d graph that at (0, -3). 0 = -1/2x - 3. -1/2x = 3. x = -6 so the x-intercept is at (-6, 0). If you only need to graph 2 points, then you can graph just those two points and draw a line between them.

To graph y=-1/2x + 3, start at the y-intercept and use the slope (-1/2) to find other points. Because your slope is -1/2, you’d go down 1 unit and then to the right 2 units. That would be your next point. If you wanted your line to go further up, go up one unit and then to the left 2 units. That would be your next point.

I am not sure what you need to do on 11 and 12

I think you should try 7, 8 and 10 on your own and let me know if you have any questions on them or if you are stuck on anything.

What happens to the exoskeleton as an arthropod grows?


PLEASE HELP ME

Answers

Answer:

What happens to an exoskeleton when an arthropod grows? The exoskeleton does not grow or expand, so it is shed and a new larger one grows. This is called molting. ... The process of shedding an outgrown exoskeleton.

Step-by-step explanation:

Answer:

As the body underneath the exoskeleton grows, the animal begins to outgrow its tough exterior. In order to cope with this situation, arthropods undergo a process of shedding their exoskeleton and forming a new one periodically throughout their lifetime. A crab undergoing the process of ecdysis, or molting.

Who can help me with my homework.

Answers

Answer:

Slope is m = -3

find equation using two point formula-- y= -3x - 5

You have a summer job that pays time and half over time ( if you work more than 40 hours) after that is 1.5 times you hourly rate of $7.00/ hr.

Answers

Answer:

Step-by-step explanation:

Having a job that pays at $7 per hour is quite nice. And the question says that if he does overtime, he gets 1 and a half times the normal price of $7. This means that, for every overtime he works, he will get paid at

7 * 1.5 = $10.5

The question didn't state what, but if it's anything to go by the wages expected to be paid then I'd say the job isn't worth it if it's overly stressful. I said so because most jobs out there aren't really about the workers, but the money instead.

What expression can be used to determine the total cost of buying c pounds of cashews for $2.65 per pound and f pounds of flour for $0.94 per pound?


PLEASE HELP

Answers

If X = total, then the equation would be

X = 2.65(c) + .94(f)

Help!!!! This Due today!!!

Answers

Answer:

A unit fraction is a rational number written as a fraction where the numerator is one and the denominator is a positive integer.

Answer:

one part of a whole

Step-by-step explanation:

A unit fraction is a fraction where the numerator is a one and denominator is a positive integer

If line l is parallel to line m what is the measure of <4?

Answers

the answer is b 50%. I think

pls i need this now can you pls answer it with respect pls

thank you in advance​

Answers

Step-by-step explanation:

2 a

3 c

4 b

5 d

6 a

7 d

8 d

9 d

10 d

plz give brillent

Prove or disprove that the point (3, 2) lies on the circle centered at (-1. -1) and containing the point (4,-1)

Can someone help me?

Answers

need a picture of the plot

y=x+5
y=-2x-4
solve by substitution

Answers

Answer:

x = − 3

Step-by-step explanation:

Let's solve your equation step-by-step.

− 2x − 4 = x + 5

Step 1: Subtract x from both sides.

− 2x − 4 − x = x + 5 − x

− 3x − 4 = 5

Step 2: Add 4 to both sides.

− 3x − 4 + 4 = 5 + 4

−3x = 9

Step 3: Divide both sides by -3.

−3x  / −3  =  9  / −3

x = − 3

Hope it helps,

Please mark me as the brainliest

Thank you

Help with fractions I don’t know

Answers

Answer: 5 5/6

Step-by-step explanation:

To divide fractions, use KCF (keep change flip)

2 1/3 = 7/3

the reciprocal of 2/5 is 5/2, so

7/3 x 5/2 = 35/6 = 5 5/6

A triangle has sides with lengths of 3 centimeters, 4 centimeters, and 5 centimeters. Is it a
right triangle?

Answers

No it would all be equal on each side

IMPORTANT!!! ILL GIVE YOU BRAINLIEST IF YOUR ANSWER IS HELPFUL
Anita typed 390 words in 6 minutes. At the rate, how many words can she type in 10 minutes?

Answers

Answer:

She can type 650 words in 10 minutes.

Step-by-step explanation:

390 divided by 6 is 65. Anita types 65 words per min. 65 times 10 is 650. Therefore she types 650 words in 10 mins.

Answer:

650 words

Step-by-step explanation:

So you divide 390 by 6 so that you can figure out how many words she types per minute.

390/6= 65

So she types 65 words per minute,

Then you multiply 65 by 10 because thats how many minutes your trying to figure out.

65*10= 650

Cierto tipo de mezcla contiene 5kg de arena y 3 kg de cemento: un constructor necesita 12 toneladas de esta mezcla. ¿qué cantidad se necesita de arena y de cemento?

Answers

Answer:

the sand and cement needed is 7.5 kg and 4.5 kg respectively

Step-by-step explanation:

The computation of the sand and cement needed is shown below:

Given that

The mix of sand and cement is 5kg and 3kg i.e. its ratio is 5:3

And there is a 12kg of mix of both things

So individually it required

For sand = 12 × 5 ÷ 8

= 7.5 kg

For cement = 12 × 3 ÷ 8

= 4.5 kg

Hence, the sand and cement needed is 7.5 kg and 4.5 kg respectively

please help me I need to get my grades up

Answers

If C = 0 then F = 32°
If C = 20 then F = 68°
If C = 60 then F = 140°

7 = a - 9.2/3 what is a?

Answers

Answer:

a= 151/15 or 10.06

Step-by-step explanation:

i hope this helps :)

What is A?
Answer
A=10.0666

let x and y be directly related. If x is 18 when y is 6, find y when x is 21.​

Answers

Answer:

y=42? because 6*2=18 so 21*2=42??

Answer:

7

Step-by-step explanation:

18/6 = 3 so we can assume that for every 3 x there is 1 y. 21/3 = 7

I am confused Help Me.

Answers

Answer:

circumference = 18.84

area= 28.26

Step-by-step explanation:

C= 2×3.14×3

A= 3.14×3²

SOMEONE PLEASE ANSWER THIS CORRECTLY AND ASAP AND I WILL MARK YOU BRAINLIEST, GIVE YOU A GOOD RATE, AND GIVE YOU A "THANK YOU" HEART BUTTON THING JUST PLEASE SOMEONE ANSWER THIS ASAP AND CORRECTLY!!!!!!!!! THIS WILL GIVE ME A SCORE SO I WILL USE YOUR ANSWER AND SEE IF IT IS CORRECT FIRST AND THEN IF ITS CORRECT I WILL MARK YOU BRAINLIEST, GIVE YOU A GOOD RATE, AND GIVE YOU A "THANK YOU" HEART BUTTON BUT SOMEONE ANSWER THIS ASAP AND CORRECTLY!!!!!!!!!!!!

Answers

Answer:

y=x+4

Step-by-step explanation:

its right so can i have brainliest

Answer:

y=x+4

Step-by-step explanation:

i need help with this badly please

Answers

Answer:

27mm

Step-by-step explanation:

Answer: 65

Step-by-step explanation: :)

what does 'b" represent in y=mx + b
A-Macaroni
B- y-intercept
C- nothing
D- Slope ​

Answers

Answer:

d

Step-by-step explanation:

Answer:

b) y-intercept

Step-by-step explanation:

y = mx + b

mx = slope

b = y-intercept

what is the arc length of the crust of half of a pizza that is 6 inches in diameter? show all work

Answers

First, you find the circumference of the full pizza.
C=d * pi
C=6pi
Then you divide it by two, because it is half of a pizza.
C=3pi

Therefore, the arc length of the crust of half a pizza is 3pi inches.

solve -3-0.5x+13=0.3x+6.2 please show work​

Answers

Answer:

x = 4.75

Step-by-step explanation:

Here is my work
And x=4.75

HELP AGAIN PLSS I WILL MARK YOU BRAINLIEST!​

Answers

Answer:

132

Total Area = Area of top rectangle+Area of trapezoid w/ bases 7 and 19

= base*height+(average of bases)(height of trapezoid)

= 7*4+8*(7+19)/2

= 28+104

= 132

Help!!!
If AB=4 feet & AD=10 feet & m What is DC?
What is BD?

Answers

DC= 4
BD= 10

Hope it’s right
Best luck with your studying

Answer:

DC=4 feet

Step-by-step explanation:

Opposite sides of a rectangle are equal.

Which equation describes the following relationship between x and y
Y is 8 less than x

Answers

Answer:

A. y = 2x^2 - 1

Step-by-step explanation:

Try the points of x and y by substitution

This gives us the function:

y = 2x^2 - 1

Please help answer correctly !!!!!!!!!!!!!!!! Will mark Brianliest !!!!!!!!!!!!!!!!!!!!!

Answers

Answer:

3/16

Step-by-step explanation:

Movie tickets cost $8 for children and $12 for adults. A movie theater has 300 seats. The theater wants to collect at least $4,800. Write a system on inequalities to model this situation.

Answers

Answer:

8x + 12y = 4800

[tex]\left \{ {{8x + 12y = 4800} \atop {x+ y = 300}} \right.[/tex]

Step-by-step explanation:

Can anyone help me please ?
I’ll mark you as a brainliest.

Answers

I believe the answer would be c=12. i hope that’s what the question is asking for lol.

I need help I don't know what to do

Answers

Answer:

Step-by-step explanation:

so you understand what to do, or what they want you to figure out.

AD  is an "arc length" .  So they want to know the length, in degrees. along the circle , from A to D.   Why didn't they just say so, huh.  :D   well, they kinda did, but not as clear as they could have.

next.  you need to know how far around a circle is all the way around?  

if you guessed 360°,  you are right

next because they gave us that angle of 93° we know all the angles around the point E,  complimentary angles add to 180 so 180-93 = 87°.  That's the to the left of 93 and directly below it too.  This is the answer to the 2nd question  ∠DEC= 87°

we can only write arc length of AD in respect to what we know about the circle.

so,   arc length of AD is  161° + BA + AD + DC = 360

or getting AD by it self , then

AD =360 -161 -BA -DC

AD = 199°-BA-DC

maybe that's all you need to do,  also i'm wondering if there is some more info about this problem , maybe at the top of the page?  of off the screen?

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