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Trava [24]
3 years ago
11

What is the a3+b3 equal to? verify by an activity

Mathematics
1 answer:
uranmaximum [27]3 years ago
3 0
a³ + b³ = ( a + b ) ( a² - a b + b³ )
For example:
a = 1, b = 2
a³ + b³ = 1³ + 2³ = 1 + 8 = 9
( a + b ) ( a² - a b + b² ) = ( 1 + 2 ) ( 1² - 1 * 2 + 2² ) =
= 3 * 3 = 3
The formula is true. 
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In a school, 22% of the students are sixth graders. What is the probability that a randomly chosen student will not be a sixth g
svlad2 [7]
If 22% are sixth graders, then the rest must not sixths graders. 

100% of the school - 22% sixth grades = 78% are not sixths graders
8 0
3 years ago
A pen is being built that is 10 feet long and 20 feet wide. How much fencing material will be ne
schepotkina [342]
I think its perimeter so you do 10x2=20 and 20x2=40 and add 20+40 to get 60 so the answer is 60 cause it says "fencing" which is the outer border

therefore answer is 60 feet 
7 0
3 years ago
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Hey yall like dat sweet algeba? then 5ab - 2c where a = 2 b = 3 and c is 0. gud luck daddio
nordsb [41]

Answer:

30

Step-by-step explanation:

5ab-2c

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30-0

30

7 0
3 years ago
All quadratic equations can be solved by factoring. True or false
MaRussiya [10]

Answer:

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3 0
3 years ago
Megan has $15,000 to invest. She is considering two investment options. Option A pays 3.2% simple interest. Option B pays 4.1% i
True [87]

wheee



Compute each option


option A: simple interest


simple interest is easy

A=I+P

A=Final amount

I=interest

P=principal (amount initially put in)


and I=PRT

P=principal

R=rate in decimal

T=time in years


so given

P=15000

R=3.2% or 0.032 in deecimal form

T=10


A=I+P

A=PRT+P

A=(15000)(0.032)(10)+15000

A=4800+15000

A=19800

Simple interst pays $19,800 in 10 years




Option B: compound interest

for interest compounded yearly, the formula is

A=P(1+r)^t

where A=final amount

P=principal

r=rate in decimal form

t=time in years


given

P=15000

r=4.1% or 0.041

t=10


A=15000(1+0.041)^{10}

A=15000(1.041)^{10}

use your calculator

A=22418.0872024

so after 10 years, she will have $22,418.09 in the compounded interest account





in 10 years, the investment in the simple interest account will be worth $19,800 and the investment in the compounded interest account will be worth$22,418.09

4 0
3 years ago
Read 2 more answers
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