I need some help with these math problems....?

Question

For extra credit for my freshman algebra 1 class, the teacher gave us the following problems. I completed all 5 of them, but I really want you guys to check my answers because I need the extra credit. Thanks!

1) 5+3[18/2X3+10X5/2]+(18-6)^2 =305???
2) 3[2(4[5(-1)^13]2)^2+5] =9615???
3) 6(2(3(5-4)^2))+22 =58???
4) 13+3[2+5(25-3^2)^2+32/16+1] = 3868????
5) 8[18(2+8)^2]+2[8(16-5)^2]+5[10(12X4)^2] =131536

X=multiplied by
/=divided by
^=to the power of

Thank you in advance for your help!

Answer 1

1) 5+3[18/2X3+10X5/2]+(18-6)^2 =305???
=5+3(27+25)+12^2
=5+3(52)+144
=305


2) 3[2(4[5(-1)^13]2)^2+5] =9615???
=3[2(4[5(-1)]2)^2+5]
=3[2(4[-5]2)^2+5]
=3[2(-40)^2+5]
=3[2(1600)+5]
=3[3205]
=9615

3) 6(2(3(5-4)^2))+22 =58???
= 6(2(3(1)^2))+22
= 6(2(3))+22
= 6(6)+22
=36+22
=58

4) 13+3[2+5(25-3^2)^2+32/16+1] = 3868????
=13+3[2+5(25-9)^2+2+1]
=13+3[2+5(16)^2+3]
=13+3[2+5(256)+3]
=13+3[2+1280+3]
=13+3[1285]
=13+3855
=3868

5) 8[18(2+8)^2]+2[8(16-5)^2]+5[10... =131536
= 8[18(10)^2]+2[8(11)^2]+5[10...
= 8[18(100)]+2[8(121)]+5[10...
= 8[1800]+2[968]+5[10...
= 14400+1936+5[10...
= 16336+5[10...

Your last question is not complete

Answer 2

-7= 3x-8 whilst putting -8 to the different area of equation, the sign will replace, so that's -7+8= 3x meaning a million=3x subsequently x= a million/3 and don't hardship with regard to the order, it is not significant! there's a rule in math with regard to the order! you could extremely verify it by skill of substituting a million/3 into the equation i.e -7= 3*a million/3-8 -7=-7!!!

Answer 3

Use the concept of PEMDAS, which stands for

parentheses, exponents, multiplication, division, addition, subtraction. Answer all your questions in that order.

To check, use your calculator.

Guido

Answer 4

5 + (3 * (((18 / 2) X 3) + ((10 X 5) / 2))) + ((18 - 6)^2) = 305
http://www.google.com/search?hl=en&lr=&q=5%2B3%2818%2F2X3%2B10X5%2F2%29%2B%2818-6%29%5E2+&btnG=Search

(6 * (2 * (3 * ((5 - 4)^2)))) + 22 = 58
http://www.google.com/search?hl=en&lr=&q=6%282%283%285-4%29%5E2%29%29%2B22&btnG=Search

Answer 5

if i have time i will come back later, but there is a category called 'homework help'
and i also want to suggest get unicode character map...
then you can do this...x³=8?
what's x?
google unicode character map...i don't have the hyperlink handy

Answer 6

Yup all ur answers are Correct. u'll get the extra credit.

Answer 7

inner to outer brackets first, then exponent, then add or subtract