Answers created by Fabio

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Some students sleep 6 hours a night. What percent of the time do they sleep in a seven day week?
63 is 90% of what number?
What is the standard form of $y = {(x - 5)}^{2} - 4$ $y= (x-5)^2-4$ ?
How do you solve $p = 2 l + 2 w$ $p=2l+2w$ for l?
How do you simplify $\frac{3}{x} - \frac{2}{x + 1}$ $3/x - 2/(x+1)$ ?
How do you solve $3.5 x - 49 = 2.2 x + 3$ $3.5x -49 = 2.2x +3$ ?
How do you evaluate ${(- 2 \cdot \sqrt{15})}^{2}$ $(- 2\cdot \sqrt { 15} ) ^ { 2}$ ?
Mason spent $15.85 for 3 notebooks and 2 boxes of markers. The boxes of markets cost $3.95 each, and the sales tax was $1.23. Mason also used a coupon for $0.75 off his purchase. If each notebook had the same cost, how much did each cost?
How do you simplify $\frac{5}{x + 3} - \frac{2}{x - 1}$ $5/(x+3) - 2/(x-1)$ ?
How do you simplify $7^{2} \cdot 8^{2}$ $7^2 * 8^2$ ?
How do you simplify $3 \times \frac{2}{5}$ $3times 2/5$ ?
How do you factor $- 2 h^{2} - 28 h - 98 = 0$ $-2h^2-28h-98=0$ ?
How do you simplify $2 (6 x + \frac{1}{2})$ $2(6x+1/2)$ ?
Stephanie has $152 in the bank. She withdraws $20. Then she deposits $84. How do you write an addition expression to represent this situation then find the sum and explain its meaning?
How do you solve $5 x - y = 9$ $5x-y=9$ and $x = \frac{1}{2} y - 3$ $x=1/2y-3$ ?
How do you write 5/9 as a decimal?
How do you simplify $x^{2} y^{2} - x y^{3} + 5 x y^{3} + 5 x y + 5 x y^{3} + 5 x y$ $x^2y ^ { 2} - x y ^ { 3} + 5x y ^ { 3} + 5x y + 5x y ^ { 3} + 5x y$ ?
How do you simplify ${(\frac{2}{5})}^{- 3}$ $(2/5)^-3$ ?
How do you simplify ${(3^{\frac{1}{2}})}^{2}$ $(3^(1/2))^2$ ?
How do you solve $3 - 2 (5 x - 4) > - 9$ $3- 2( 5x - 4) > - 9$ and $3 x > - 4 (x - 2)$ $3x > - 4( x - 2)$ ?
How do you subtract $\frac{13}{14 s} - \frac{11}{49 s}$ $\frac { 13} { 14s } - \frac { 11} { 49s }$ ?
How do you find the equivalent exponential expression ${(9^{4})}^{3}$ $(9^4)^3$ ?
What is the domain and range of $y = \frac{x + 3}{x - 5}$ $y = (x + 3) / (x -5)$ ?
How do you factor ${(x + 2)}^{2} - 5 (x + 2)$ $(x+2)^2 -5(x+2)$ ?
How do you solve $13 = 8 - 5 d$ $13 = 8-5d$ ?
What is the slope of the line passing through the following points: $(- 7, 11), (9, - 10)$ $(-7,11), (9, -10)$ ?
How do you solve the system $x + 2 y = 13$ $x+2y=13$ and $3 x - 5 y = 6$ $3x-5y=6$ using substitution?
How do you evaluate the integral of $\int \frac{x}{6} d x$ $int x/6 dx$ from 0 to 2?
How do you evaluate $\frac{7}{13} + \frac{1}{7}$ $\frac{ 7}{ 13} + \frac{ 1}{ 7}$ ?
What adds To be the bottom number but also multiplies to be the top? The top number is 48. The bottom number is 14.
How do you differentiate $f (x) = (4 x^{2} + 5) (3 x - 5)$ $f(x)= (4x^2+5)(3x-5)$ using the product rule?
What is the derivative of $y = \frac{x}{5 - 3 x}$ $y=x/(5-3x)$ ?
What is x if ${(4 x + 3)}^{2} = 7$ $(4x+3)^2=7$ ?
How do you convert $y = x^{2} + 18 x + 95$ $y=x^2+18x+95$ in vertex form?
How do you solve $15 + 5 t + 5 = 415$ $15+ 5t + 5= 415$ ?
You earn $56 walking your neighbor's dog for 8 hours. Your friend earns $36 painting your neighbor's fence for 4 hours. What is your pay rate? What is your friend's pay rate? Are the pay rates equivalent?
What is the equation of the line that has a slope of $- 2$ $-2$ and goes through the line $(4, 3)$ $(4,3)$ ?
How do you solve $\frac{7}{y} - \frac{7}{3} = \frac{1}{4}$ $7/y-7/3=1/4$ ?
How do you solve $22 x - x^{2} = 96$ $22x-x^2=96$ ?
How do you simplify $\frac{{(- 10)}^{5}}{{(- 10)}^{9}}$ $(-10)^5/ (-10)^9$ leaving only positive exponents?
If a tanker is towed at the rate of 5 miles an hour, how many hours will be needed to tow the tanker 28 miles?
How do you differentiate $g (x) = (2 x^{2} + 4 x - 3) (5 x^{3} + 2 x + 2)$ $g(x) = (2x^2 + 4x - 3) ( 5x^3 + 2x + 2)$ using the product rule?
How do you solve using the quadratic formula $3 x^{2} + 6 x = 12$ $3x^2 + 6x = 12$ ?
What are the asymptotes and removable discontinuities, if any, of $f (x) = \frac{1}{x^{2}} + 2$ $f(x)= 1/x^2+2$ ?
What is the vertex form of $y = x^{2} - 14 x + 16$ $y = x^2 -14x + 16$ ?