# Algrebra

posted by .

Please confirm if I did the follow problems correctly:
A) Find the sum or difference.
(5a – 3b) + (2a + 6b)= 7a + 9b
Answer: = 7a + 9b
B) Let’s work a few of these (FOIL)
1) (x+2) (x+8) = x 10
2.) (x+5) (x-7) = x + 11
Answer: x + 11
3.) (2x+4) (2x-3) = 4x + 7
Answer: 4x + 7

• Algebra -

A) 7a + 6b (3b is negative)

B) These are indicating that you need to multiply. (I don't know what "FOIL" means.)

1) (x+2) (x+8) = x^2 + 10x + 16

I'll let you use that same process to find the remaining answers.

## Similar Questions

1. ### Algebra

Here is the problem: A two-digit number is eight times the sum of its digits.When the number is added to the number obtained by reversing the digits,the sum is 99. Find the original number. Please explain hot to solve it and it would …
2. ### Algebra

Here is the problem: A two-digit number is eight times the sum of its digits.When the number is added to the number obtained by reversing the digits,the sum is 99. Find the original number. Please explain hot to solve it and it would …
3. ### Algrebra

How do you insert grouping symbols to make this equation true?
4. ### Algebra

Please confirm if I did the follow problems correctly: A) Find the sum or difference. (5a – 3b) + (2a + 6b)= 7a + 9b Answer: = 7a + 9b B) Let’s work a few of these (FOIL) 1) (x+2) (x+8) = x 10 Answer: x10 2.) (x+5) (x-7) = x + …
5. ### Algrebra-Systems of Equations

Kasey is thinking of 2 munbers. The sum of the two numbers is -18. Their difference is 38. Write a system of equations that can be used to find the numbers.
6. ### Algebra

I have a few problems I need some help with. The first is Evaluate the sum. 1. There is an E like symbol on the top is 10 on the bottom n=1 and to the right (7-2n) 2. The next question is find a10 for an arithmetic sequence with a1=6 …
7. ### Math

9(x+2)(x+1)-2(x+2)-4(x+1)=0 I'm in the middle of solving an equation. I know that you have to FOIL but how did they get 9(x^2+3x+2)-(4x+4)=0 ?
8. ### stats

It is a multiple choice exam with 12 problems, each problem has 5 options. You need to answer 10 correctly to pass, what is the probability that by guessing you will answer at least 10 problems correctly?
9. ### comparing fractions

A third grade class was given a multiplication quiz. The quiz had 10 problems. Any correctly answered 6 problems, Bobby answered 7 problems correctly, Tom answered 9 problems correctly, and Sue only answered 2 problems correctly. A. …
10. ### Math

(1.) 7 2/7 x 3 7/9 (use benchmark to estimate the sum difference or product A 32 B 28 (My answer) C 24 D 21 (2.) Find the sum 3/9 + 4/9 A 7/9 B 7/18 C 7/81 (my answer) D 2/3 (3.) Find the Sum 14 2/9 + 11 2/3 A 25 8/9 B 25 1/9 C 25 …

More Similar Questions