Mathematics High School

3. Find the products.
a) (a? + 4) (a? – 4)​

Answers

Answer 1

Answer:

a^2-16

Step-by-step explanation:

you just a.a+a.-4+4.a+4.-4=a^2-16

Related Questions

When Emily arrived home from school, she spent 8 minutes eating a snack. Then, she spent 15 minutes playing with her dog and 32 minutes doing her chores. Finally, Emily spent 45 minutes finishing her homework. How long had Emily been home when she finished her homework?

Answers

Answer:

1 hour and 40 mins

Step-by-step explanation:

I need help with these two questions

​

Answers

Answer:

The first one: 19/15a

second one: b²-4ac = D

Step-by-step explanation:

for first one: take LCM and solve

for second one: you square the expression on both sides then b²= D + 4ac, then when you take 4ac to the left hand side, it becomes b²-4ac= D

On the grid below, draw the graph of y = 2 - 3x for the values of x from - 3 to 3

Answers

Step-by-step explanation:

slop -3

(x ,y) point that throgh the x,y axis

(0,2), (1,-1), (2, -4),( -1, 5), ( -2, 8) etc you can make the graph by connect the co ordinat point

Sue is seven pounds less than three times David’s weight. If David weighs d please write an expression for Sue’s weight.


Please evaluate if d = 39

Answers

Sue = 3d - 7
Sue = 3 x 39 - 7
Sue = 117 - 7
Sue = 110

please answer! will give brainliest :)

Answers

Your answer is 20,321.5+8707.37 which equals 29028.87 feet. Mount Everest is 29028.87 feet tall.

please help quickly im on a test
if f(x)=x+4, and g(x)=2x+4, what is f(2)+g(2)?

Answers

Answer:

14

Step-by-step explanation:

f(2)+g(2)

(2+4)+(2×2+4)

6+8

14

Bob ate 1/3 loaf of bread over 4 days. He ate the same amount of bread each day. What fraction of the loaf did Bob eat each day?

Answers

honestly I couldn’t tell you

What is the value of x?

Answers

Answer:x = 8.5

Step-by-step explanation:

1. Combine like terms

62+75+9 = 146

2.Set up equation

146+4x = 180

3. Subtract 146 to each side

146-146 + 4x = 180-146 = 34

4. Divide by 4

4x/4 = 34/4

X= 8.5

8 + 10 - 2 / 2
Order of operation how to do it

Answers

Answer:

17

Step-by-step explanation:

Order of operations are..

Parentheses ()

Exponents 10^2

Multiply *

Division /

Addition +

Subtraction -

8+10-2/2

first you would do -2/2=-1

then your problem is 8+10-1

8+10=18-1=17

Choose the solution to this inequality. 43<−83y
A. y < −12
B. y > 12
C. y < 43
D. y > 4

Answers

Maybe A
I don’t really know

answer this mannnn i need hemo

Answers

a - 1 will be positive.

a is to the right of the positive number 1 on the number line. Subtracting 1 from a will give a result that is still to the right of zero, which means a positive number.

Find the total surface area of this cone.
Leave your answer in terms of .
4ft
3ft
SA = [?] ft2
Enter

Answers

Total surface area is: 21 ft²

Lateral area is: 12π ft²

The total surface area of this cone is 21π square feet.

What is the total surface area of the cone?

The total surface area of the cone is given by the following formula;

[tex]\rm Surface \ area=\pi r(r+l)[/tex]

Where h denotes the height of the cone and r is the radius and l is the slant height.

The radius of the cone = 3

The height of the cone = 4

Substitute all the values in the formula

[tex]\rm Surface \ area=\pi r(r+l)\\\\\rm Surface \ area=\pi 3(4+3)\\\\\rm Surface \ area=3\pi \times 7\\\\\rm Surface \ area=21\pi[/tex]

Hence, the total surface area of this cone is 21π square feet.

Learn more about the surface area here;

https://brainly.com/question/20759327

#SPJ2

Math is garbage and it sucks please help before I smash my laptop with a brick

Answers

Answer:

7x+66=122

Hope this helps =]

Answer:

7x+66=122

Step-by-step explanation:

x+x+x+x+x+x+x+66=122

7x+66=122

7x=56

x=8

danielle did not complete 15 of her 200 assignments last year. Kim said that is 0.075 of her assignments and Kelly said it is 0.75 of her assignments. Who is correct and how do you know?

Answers

Answer:

Kim

is correct

Step-by-step explanation:

Here, we want to know who is correct between Kim and Danielle

From the question, what is not completed is 15 out of 200

To find what is not completed, we divide 15 by 200

Thus, we have;

15/200 = 0.075

This mean Kim is correct

Find the slope of the line

Answers

Answer:

Undifined

Step-by-step explanation:

Plz, answer this question plz!
Plz, answer this question plz!
Plz, answer this question plz!
Plz, answer this question plz!
Plz, answer this question plz!

Answers

Actual Answer:

A (I  THINK )

Answer:

There is a hack in forms that forms gives u the answer hold ctrl + u, and scrool to the bottom he read the part with the question and there will be an answer.

Mark as brainliest if im right good luck!!

Answer C

Step by step: i think its c because i have no idea.

A dolphin is swimming at a depth of –3.4 meters with respect to sea level when it begins diving deeper at a constant rate of –0.25 meter per second. In how many seconds will the dolphin reach a depth of 9.9 meters below sea level?

Answers

Answer: 26 s

Step-by-step explanation:

Given

Dolphin is 3.4 meters below the sea level

It started moving at a rate of [tex]-0.25\ m/s[/tex]

Distance travel in the vertical direction by dolphin is

[tex]\Rightarrow 9.9-3.4=6.5\ m[/tex]

time taken is given by

[tex]\Rightarrow time(t)=\frac{\text{Distance}}{\text{Speed}}\\\\\Rightarrow t=\frac{6.5}{0.25}=26\ s[/tex]

Please help me ASAP please do not put a link

Answers

1478 cubic feet

First, calculate volume of the shed, then minus that by the volume of the cubes...

Volume(shed) = 12*12*12 = 1728

Volume(cube) = 2.5*2.5*2.5 = 15.625

1728 - 15.625(16) = 1478 cubic feet

Work out the length x.
17 cm
9 cm

Answers

Answer:

14.4222051019 or 14.42

Step-by-step explanation:

a^2 + b^2 = c^2

x^2 + 9^2 = 17^2

x^2 + 81 = 289

x^2 = 289 - 81

x^2 = 208

x = 14.4222051019 or 14.42

Here is an expression 3*2t.


Evaluate the expression when t is 1

Answers

Well if t is equal to 1, then it would be 3*2*1. And since the one can basically be disregarded, the answer would be 3*2

Anyone do you know
An after-school program offers tutoring for different subjects. During the last month, a teacher recorded the number of students who participated in tutoring for each subject, as shown in the table below:

Image description not available
Use this data to predict how many students of the next 100 students will participate in math tutoring.

Answers

Answer:

The image doesn't show

Step-by-step explanation:

Pedro bought a skateboard last week. The list price of the skateboard was $64.90. He has a 20% coupon. He has to pay 8.5%
sales tax. What is total price of the skateboard with the discount, including tax? Round to the nearest cent if necessary.

Answers

Take the original price and times it by .8 (you could times it by .2 and then subtract from the original price but multiplying it by .8 is much easier) 64.9x.8= 51.92 take your discounted price and multiply it by 1.085 to account for the sales tax (you multiply by 1.085 to account for the price of the item and the tax you could times it by .085 and then add it on to the price of the item but this way it shortens the amount of steps needed) 51.92x1.085= 56.3332
Round to the nearest cent
Answer=$56.33

solve the equation 0.26 x+0.12(2 x+1000)=300

Answers

Answer:

x=360

Step-by-step explanation:

This recipe makes 20 cupcakes. Deepak only wants to make 8 cupcakes. How much of each ingredient does he need? Recipe: Makes 20 cupcakes 12 ounces butter 8 ounces sugar 10 ounces flour 5 eggs

Answers

Answer:

20÷8=2,5 12÷2,5=4,8 8÷2,5=3,2 10÷2,5=4 5÷2,5=2 therefore 4,8+3,2+4+2=14

an uber charges a flat fee of $15 then charges $4 per mile write an equation for the total cost of ur ride? identify the m, b, & Equation

Answers

Answer:

Step-by-step explanation:

What is the value of x?
Enter your answer in the box.
units

Answers

Answer:

x = 28

Step-by-step explanation:

ΔARP ≈ ΔCRD

42/x = 57/(10+x)

cross-multiply:

42(10+x) = 57x

420 + 42x = 57x

420 = 15x

28 = x

A force of 20,000 N is exerted for 5.00 s, on a 75,000 kg mass. What is the impulse of the force for this 5.00 s ?

Answers

Answer:

Check pdf

Step-by-step explanation:

The impulse of the given force is required.

The impulse of the force which is being exerted on an object of 75000 kg is 100000 Ns.

Impulse

F = Force exerted on a body = 20000 N

t = Time the force was exerted for = 5.00 s

When finding the impulse of a force the mass of the object the force is being applied to does not matter. The only thing that can affect the force is if another force is being applied by the object which here is not doing so.

Impulse is given by

[tex]J=Ft\\\Rightarrow J=20000\times 5.00\\\Rightarrow J=100000\ \text{Ns}[/tex]

Learn more about impulse:

https://brainly.com/question/25700778

A construction company can remove 8 1/4 metric tons of dirt from a construction site in 5 1/2 hours what is the unit rate in metric tons per hour?

Answers

Answer:

1 1/2 tons per hour

Step-by-step explanation:

8 1/4 ÷ 5 1/2

How do you graph the equation, 2x+3y=12

Answers

Answer:

find y=mx+b

y=-2/3x+4

so m= -2/3

b= 4

what you want to do is start at 4 since b and go down 2 times then right 3 times or go up 2 times and left 3 times or just plug in the equation in desmos graphing calculator

Un pueblo tenía 13.578 habitantes en 1970. En 1988 la población se incrementó 1,5 veces con respecto a 1970 y en 2001 se incrementó 2,25 veces en relación a 1988. ¿Cuántos habitantes había en el año 2001?

Answers

Answer:

En 2001 el pueblo poseía 45.826 habitantes.

Step-by-step explanation:

Un pueblo tenía 13.578 habitantes en 1970. En 1988 la población se incrementó 1,5 veces con respecto a 1970. Para calcular entonces la población en 1988 debes realizar el siguiente cálculo:

13.578*1,5= 20.367

Por lo que en 1988 el pueblo poseía 20.367 habitantes.

En 2001 se incrementó la población 2,25 veces en relación a 1988. Para calcular entonces la población en 2001 debes realizar el siguiente cálculo:

20.367* 2,25= 45.825,75≅ 45.826

Por lo que en 2001 el pueblo poseía 45.826 habitantes.

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