Questions on Algebra: Evaluation of expressions, parentheses answered by real tutors!

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Question 524485: How do you write 3.15x10 to the 4th power in standard form?
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Question 524679: simplify 5(3x-2y)+2(x+2y)-3(3x-2y)
Click here to see answer by edjones(8007) About Me 

Question 524808: evaluate 5y+2 when y=1/5
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Question 525865: 6b+14=-7+-1b Can you help me to solve this problem? sydney222@localnet.com
Click here to see answer by jim_thompson5910(35256) About Me 

Question 525964: what is 10x plus 40
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Question 526557: evaluate f(x)at the given value of x
f(x)=x^3/4

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Question 526679: 1. Imagine you are at a gas station filling your tank with gas. The function C(g) represents the cost C of filling up the gas tank with g gallons. Given the equation C(g) = 3.03(g)
a. What does the number 3.03 represent?
b. Find C(2).

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Question 526985: Write as a mathematical expression using parenthesis and brackets. Then evaluate. Subtract 3 from 15. Divide this difference by 2. Multiply this quotient by -2.
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Question 527003: Simplify -2[9 - (x + 7)].
Click here to see answer by jim_thompson5910(35256) About Me 

Question 527395: Now I'm like, well duh! Truly tahnkufl for your help.
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Question 527870: Evaluate 6^x if x =-2
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Question 527870: Evaluate 6^x if x =-2
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Question 527876: how do you find the answer


5*7+3/2

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Question 527874: Write each fraction as an expression using a negative exponent other than -1. 1/7^2
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Question 527872: Evaluate (m+n)^-3 if m=-1 and n=-5
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Question 527859: find the expression 4-16m
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Question 527860: Find the GCF of 40c^2d and 42c
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Question 528996: how to evaluate the expression fo m=2
5m+2(m+8)+3

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Question 529296: (-8)-6
Click here to see answer by oberobic(2304) About Me 

Question 530564: -4( x + 7 ) = -16
x=?

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Question 531043: Can I have help on the steps to solve this equation: 12=(c-6)÷2

Click here to see answer by Alan3354(69443) About Me 

Question 531117: evaluate the expression when r is 3, s is -1, and t is 4
r^3s^4t^2

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Question 531143: evaluate the expression when y is -2 and z is -16
z%5E2%2F-8y%2Bz=

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Question 531132: Evaluate the expression when r is -2 and s is -3
r^2s^2=

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Question 531175: i just wanna ask if u do have crossword puzzle with answers and solution in evaluation in algebraic expressions??
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Question 532361: 5n+(4n-3)=15
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Question 533114: translate an algebraic expression
one tenth of y

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Question 533894: need the algebraic expression for 2 less than the sum of 5 and the product of 4 and 12
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Question 534585: x+2y/9 x=10 y=7
evaluate write answer as a fraction in lowest terms,
I get the answer of 140/9 i have no idea of what im doing here.

Click here to see answer by unlockmath(1688) About Me 

Question 535725: I need to place parentheses in this equation so that the value is
15. 6+6squared÷9-5

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Question 535817: -3(x + 2x^2 + 3x)

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Question 536727: how do you work this problem (T4)-2
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Question 537180: -9x+7=25+2(5-x);x=-4
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Question 537372: -(z+89)= find the equivalent expression without parenteses
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Question 537378: -(z+89) find an equivalent expression without parentheses

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Question 537581: 3(4x-17)=3(5x+1)-1

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Question 537573: 11 - 8 ÷ (1/3 + 1/5)
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Question 537810: Can you please help me solve 15n=m? No other info was given. Thank you!!!
Click here to see answer by Alan3354(69443) About Me 

Question 538106: give an algebraic expression for the difference between y and a -27
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Question 538293: we are working on Ellipses and i understand it, but for some reason, i am not coming up with the right answer.
7x^2 + 3y^2 - 28x - 12y = -19
my work:
(7y^2-28x) + (3y^2-12y) = -19
-> 7(x^2 - 4x +(-2)^2) + 3(y^2 - 4y +(-2)^2) = -19 + 28 + 12
-> 7(x-2)^2/21 + 3(y-2)^2/21 = 1
for ellipses aren't the end results for the denominators supposed to be able to be square rooted? i got 3 and 7 which are not able to be square rooted and im confused at what i am doing wrong.

Click here to see answer by Alan3354(69443) About Me 

Question 539558: five times a number, increase by two less than twice the number is forty. find your number.
5a+(2a-2)=40 Stuck on showing how the answer turns out...6.

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Question 540317: is: -(2y-4x-4) equal to this: -2y + 4x + 4 ?
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Question 540296: 3g+2h with 3rd exponent on h

g=-3
h=2

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Question 539838: 8t=3(t+55)
Please help me solve this problem.

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