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
atroni [7]
3 years ago
8

What is the value of the product (3-21) (3 + 21)?

Mathematics
1 answer:
stepladder [879]3 years ago
8 0

Multiply the two brackets together

(3-21)(3+21)

(3)(3)(3)(+21)(-21)(3)(-21*21)

9+63-63-441

- 441 because whenever multiplying a - negative number and a + positive number = - negative number

9-441

= -432

Answer: -432

You might be interested in
Help plz i give brainiest
dybincka [34]

Answer:

a) 5²/4². b) 4.2²/2.8²

This is your answer ☺️☺️

7 0
2 years ago
Read 2 more answers
Maria invests $600 in a bank account that earns simple interest. She earns $30 at the end of 12 months. Janae invests $350 at th
olga nikolaevna [1]
I believe the answer is $17.50, she earned $30 off of $600 meaning she had a 5% interest rate and 5% of 350 is $17.50
6 0
3 years ago
Please can you help me with this problem? Thanks.
777dan777 [17]
-2.5(1-2n)-1.5n
=-2.5+5n-1.5n
=-2.5+3.5n

Answer: B.  -2.5+3.5n

8 0
3 years ago
Read 2 more answers
Solve for x: x5 + x4 − 7x3 − 7x2 − 144x − 144 = 0
motikmotik

x^5 + x^4 - 7x^3 - 7x^2 -144x - 144 = 0 \\x^4(x+1)-7x^2(x+1)-144(x+1)=0\\(x^4-7x^2-144)(x+1)=0\\\\x+1=0\Rightarrow x=-1\\\\x^4-7x^2-144=0\\x^4-16x^2+9x^2-144=0\\x^2(x^2-16)+9(x^2-16)=0\\(x^2+9)(x^2-16)=0\\(x^2+9)(x-4)(x+4)=0\\\\x^2+9=0\vee x-4=0 \vee x+4=0\\x=4 \vee x=-4\\\\x\in\{-4,-1,4\}

6 0
3 years ago
Read 2 more answers
The interior of a safe is shaped like a cube with edges 9 inches long. What is the volume of the interior of the safe?
fgiga [73]

Answer:

Assuming that all three sides are 9 inches then the answer should 729.

Step-by-step explanation:

Just multiply 9*9*9. The formula to get volume is (length)*(width)*(height).

3 0
3 years ago
Other questions:
  • A new bank customer with $4,500 wants to open a money market account. The bank is offering a
    10·2 answers
  • HELLLLLLLPPPPPPPP MEEEEEEEEEE!!!
    6·1 answer
  • Write the equation in slope-intercept form with the point (2,7.5) with an x intercept of −1. And plz tell me how you got it Than
    15·1 answer
  • Solve the equation for x. 2+34=4(x+5)
    8·2 answers
  • Please help me thanks
    6·1 answer
  • I need help pleaseeeeeeeee
    5·1 answer
  • Identify the slope, y-intercept, and x-intercept of the graph of the linear equation. Show your work. −2x + y = 4
    9·1 answer
  • Circle O has a radius of 5 centimeters and central angle AOB with a measure of 60°. Describe in complete sentences how to find t
    8·1 answer
  • The product of two rational numbers is 6.If one of them is 8,find the other number.
    10·1 answer
  • If brad is x years old and Julie is five years younger than brad how old is Julie
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!