Algebra help pls???

Question

Evaluate and write the result in simplest form:

(2 3/8)(4/9)

Determine whether the ordered pairs are solutions of the equation.
y - 2x= -1
a. (3,7)
b. (0,-1)
c. (-2,-5)
d. (-1,0)

Find the prime factorization of 420

Use the Commutative Property of Multiplication to complete the statement:
6(x + 2)

Simplify:
7x(x - 6)

The property tax on a house valued at $50,000 is $640. Use the guess, check, and revise strategy to estimate the property tax on a house valued at $75,000.

If a number is decreased by 10, and the result is divided by 2, the answer is 15. Find the number.

To earn at least a grade of B, a student must have an average of at least 80 points on five tests. A student's grades on the first four tests were 79, 83, 89, and 75. What is the least number of points the student must score on the fifth test to earn a grade of B or better? Write an inequality and solve for the score on the fifth test.

Answer 1

Ur just getting someone to do ur homework for u. LOSER!!!

Answer 2

first answer is 2 12/72 = 2 1/6

second answer is D

third answer is...trying to remember what "prime factorization means".....I think it's 2 x 2 x 3 x 5 x 7.

fourth answer is 6x + 12

fifth answer is....ummm....not sure what they mean by "simplify" here. You can expand to get 7x^2 - 42x but I don't know if that's what they want.

The answer to #6 is $960, although I don't know what the "guess, check, revise" strategy is.

For #7 you work backwards. 15 x 2 +10 = 40.

For #8, 79 + 83 + 89 + 75 + x = 400. x=74. I'm guessing that they want you to write the inequality 326 + x >= 400 before you solve.

Answer 3

(79+83+89+75+x)/5 > 80

(326+x)/5 > 80

326 + x > 400

x > 74

Answer 4

1. (2*3...+8) * (4/9)
2 just plug in the first number in the parenth. as x, and the second one as y, and see if its works
3. i cant remember this
4. just look up the format
5. that is simplified
6. um...
7. (x-10)/2 = 15...x-10 = 30...x = 40....that is sooo easy, come on
8. (4 numbers added) + x is greater than or equal to 80 * 5....simple addition and subtraction

Answer 5

ok, you have: (ok 5) - a million = 7 So what you prefer to do is make ok the placement of the equation (isolate it), so first you transpose a million (chuck it over the equivalent sign and alter it to a organic / non-organic selection (opposite its sign :P)). this grants us: (ok 5) = 8 then you definately prefer to convey 5 as much as the different area with the intention to isolate ok; we do this with the help of doing here: ok = 8 x 5 which components us 40. it is the fee of ok (ok = 40). that's a thank you to coach / examine your answer: substitute your fee of ok into the equation, so which you have: (ok 5) - a million = 7 After substitution you have: (40 5) - a million = 7 it is, 8 - a million = 7 This fact is actual, meaning that the respond is actual! wish the motives and all helped! ;P

Answer 6

(2 3/8)(4/9)
(19/8 )(4/9)
76/72
simplest form
19/18

y - 2x= -1
a. (3,7)
___x,y
b. (0,-1)
___x,y
c. (-2,-5)
___x,y etc
d. (-1,0)

plug it in i will do a only
7 - 2(3) = -1
7 - 6 = -1
1 = -1 no

________________ 420
________________20__21
______________10_2___7_3
_____________5_2
so it's 2, 7, 3, 5, 2

6(x + 2)
6x+12

7x(x - 6)
7x^2 - 42x

do the rest by ur self

Answer 7

I'll help you with one, thats understandable, but you shouldn't be trying to get people to do all of your homework for you.

Simplify 7x(x-6)= 7x squared (to the power of two)-42x