I have a few of these questions that I need help on, please help me!
1. 16x^2 + 2 + 2x - 15x^2 - 1 + 14x
2. 2x^2 + 8 8 - 4x + 3x - 6x^2 + 7
3. 2x^2 = 6x - 7x +8 - 3x^2 + 1
5. (m^2 - m - 4) + (m - 5)
6. (5x^2 + x - 3) - (-2x^3 + 4)
9. 64^10/64^5
10. x^11/x^4
11. 4^3 x 4^12
12. 4^4 x 4^44
14. 3^3/3^6
15. (9 x 10^6)(7 x 10^5)
16. (1.1 x 10^-5)(3 x 10^-2)
18. -3(4x + 5)
19. 3k^2(-2k^2 - 4k + 7)
20. (-6x)x 7x^2
21. (7y^2 - 3y) + (8y^2 - 8y)
Ms. Sue, I'm sorry! I got these answers for those problems. :\
I didn't post the choices and my answers cause I thought it'd be too much work...
1. x^2 - 12x + 1
2. -4x^2 - x + 15
3. 2x^2 + x + 9
5. m^2 - 2m - 9
6. 14t- 8
9. 64^50
10. x^7
11. 4^36
12. 4^48
14. 1/27
15. 4.1 x 10^-7
16. 64t^10
18. -12x - 15
19. -6k^3 - k + 10k
20. -42x^3
21. 15y^2 -11y
1. x^2 - 12x + 1 ----> x^2 - 16x + 1
2. contains typo
3. is an equation, not expression
5. m^2 - 2m - 9 ----> m^2 - 9
6. 14t- 8 ----> doesn't even match question
9. 64^50 ---->64^10/64^5 = 64^(10-5) =
need to study rules of exponents
10. x^7 --- YEAHHH
11. 4^36 -- 4^3 x 4^12 = 4^(3+12) = ...
need to study rules of exponents
12. 4^48 === correct
14. 1/27 ==== correct
15. 4.1 x 10^-7 === not even close
== (9 x 10^6)(7 x 10^5) = 63 x 10^11 = 6.3 x 10^12
16. 64t^10 === doesn't even match the question
18. -12x - 15 === nope
19. -6k^3 - k + 10k ==== nope
20. -42x^3 ==== 0k , but don't use x to represent multiplication if x is the variable
21. 15y^2 -11y ==== ok
I'd be happy to help you with these questions! Let's go through each of them step by step.
1. To simplify the expression 16x^2 + 2 + 2x - 15x^2 - 1 + 14x, combine like terms. Grouping the terms with the same exponent of x, we have (16x^2 - 15x^2) + (2x + 14x) + (2 - 1). This simplifies to x^2 + 16x + 1.
2. Similarly, to simplify 2x^2 + 8 8 - 4x + 3x - 6x^2 + 7, group the terms: (2x^2 - 6x^2) + (-4x + 3x) + (8 + 7 + 8). This simplifies to -4x^2 - x + 23.
3. For the equation 2x^2 = 6x - 7x + 8 - 3x^2 + 1, start by combining like terms on both sides of the equation. This gives us 2x^2 + 3x^2 - 6x + 7x - 8 + 1 = 0. Simplifying further, we have 5x^2 + x - 7 = 0. This equation cannot be further simplified unless the quadratic formula or factoring is applied.
5. To simplify (m^2 - m - 4) + (m - 5), first simplify each expression inside the parentheses: m^2 - m - 4 + m - 5. Then combine like terms within the expression: m^2 - m + m - 4 - 5. This simplifies to m^2 - 9.
6. To simplify (5x^2 + x - 3) - (-2x^3 + 4), distribute the negative sign to the terms inside the second set of parentheses: 5x^2 + x - 3 + 2x^3 - 4. Combining like terms, we get 2x^3 + 5x^2 + x - 7.
9. To simplify 64^10 / 64^5, use the property of exponents that states when dividing terms with the same base, you subtract the exponents. In this case, we have 64^(10 - 5), which equals 64^5.
10. To simplify x^11 / x^4, use the property of exponents that states when dividing terms with the same base, you subtract the exponents. In this case, we have x^(11 - 4), which simplifies to x^7.
11. To simplify 4^3 x 4^12, use the property of exponents that states when multiplying terms with the same base, you add the exponents. In this case, we have 4^(3 + 12), which simplifies to 4^15.
12. To simplify 4^4 x 4^44, use the property of exponents that states when multiplying terms with the same base, you add the exponents. In this case, we have 4^(4 + 44), which simplifies to 4^48.
14. To simplify 3^3 / 3^6, use the property of exponents that states when dividing terms with the same base, you subtract the exponents. In this case, we have 3^(3 - 6), which simplifies to 3^-3.
15. To simplify (9 x 10^6)(7 x 10^5), multiply the numbers outside the parentheses to get 63. Then, multiply the powers of 10 by adding the exponents, resulting in 10^(6 + 5). Therefore, the simplified expression is 63 x 10^11.
16. To simplify (1.1 x 10^-5)(3 x 10^-2), multiply the numbers outside the parentheses to get 3.3. Then add the exponents of 10, resulting in 10^(-5 - 2). Therefore, the simplified expression is 3.3 x 10^-7.
18. To simplify -3(4x + 5), distribute the -3 to the terms inside the parentheses: -3 * 4x + (-3) * 5. This simplifies to -12x - 15.
19. To simplify 3k^2(-2k^2 - 4k + 7), distribute the 3k^2 to each term inside the parentheses: 3k^2 * -2k^2 + 3k^2 * -4k + 3k^2 * 7. This expands to -6k^4 -12k^3 + 21k^2.
20. To simplify (-6x)x 7x^2, multiply the -6x by 7x^2: -6x * 7x^2. This simplifies to -42x^3.
21. To simplify (7y^2 - 3y) + (8y^2 - 8y), group the terms: (7y^2 + 8y^2) + (-3y - 8y). This simplifies to 15y^2 - 11y.
You are kidding!
No one is going to do 21 problems for you.
Choose 5 problems, work them out, give the answers, post them, and someone may check them for you.
Btw -- asking for a bunch of answers could get you banned from posting here.