Use Distance = rate * time : d= r*t Upstream : boat is against the water so speed goes down : speed of the current = - r downstream : boat is flowing with the water so speed become faster speed of the current = +r time is 1.5 together create...

Word problems (answer)

Use Distance = rate * time : d= r*t Upstream : boat is against the water so speed goes down : speed of the current = - r downstream : boat is flowing with the water so speed become faster speed of the current = +r time is 1.5 together create...

Let Tina = x, Dawn = y, and Harry = z Together they have 175: x+y+z = 175 Tina has 3 times as much as dawn: x = 3*y dawn has twice as Harry: y= 2*z ____________________________ Now you have total 3 equations: x+y+z...

please help me (answer)

8 ≤ 3/4(2x+5) ≤ 6 avoid working with fraction so multiply the whole equation by 4 32 ≤ 3(2x+5) ≤ 24 Now distribute 3 32 ≤ 6x+15 ≤ 24 subtract 15 to front and back 32-15 ≤ 6x ≤ 24-15 simplify 17 ≤ 6x ≤ 9 ...

ax2+bx+c = 0, Quadratic formula: x = [ -b ± sqrt(b^2 - 4ac) ] / 2a 1. x^2-8x+20=0 a=1, b=-8 , c=20 Plug in the value for a, b and c in the quadratic formula x = [ -b ± sqrt(b^2 - 4ac) ] / 2a x =...

5(t+3)+9 = 3(t-2)+6 (answer)

5(t+3)+9 = 3(t-2)+6 Use distribution property 5t+15 + 9 = 3t-6 + 6 Combine like terms on same sides 5t+ 24 = 3t Now combine like terms by subtracting 5t on both side -5t ...

|x|+2 is less than or equal to 13 (answer)

|x|+2 < 13 To solve absolute value problems, absolute value has to be all by itself. Therefore move over the 2 by subtracting it to the other side of equal sign. |x|+2 -2 < 13 -2 ...

2x-y=4 x+5y=24 (answer)

Given: 2x-y=4 x+5y=24 Using substitution Solve for y in 1st equation 2x-y = 4 (add y over and subtract 4 over to other side to make y all by itself) y = 2x- 4 Now take 2nd equations and substitute for y since...

Start out writing equation in Slope Intercept form: Y= MX + B Use the point and slope to plug into the equation so you can solve for B. (1,2) and Slope (M) = 7 2 = (7)(1) + B 2 = 7 + B (Subtract 7 to find B) B = -5 Now write...

Use the distance formula: √( (x2-x1)² + (y2-y1)²) Given : (x1,y1) & (x2,y2) For ex: (2,7) and (5,11) =√( (5-2)² + (11-7)²) =√( (3)² + (4)²) =√(9 + 16) =√(25) = 5

9m^3n-36mn^3+39m^4n^2 (answer)

9m^3n-36mn^3+39m^4n^2 Find the GCF (Greatest Common Factor) : 3 m n 3 m n (3 (m^2)-12 (n^2) + 13 (m^3) n)

x^2 - 18 + 79 = 0 (answer)

If the equation is x^2 - 18x + 79 = 0 Completing the Square : move the number 79 on the other side of equal sign and use formula as indicated x^2 +bx +(b/2)^2 = c + (b/2)^2 x^2 - 18x (-18/2)^2 = -70 + (-18/2)^2 x^2 - 18x...

Solve the given linear system. (answer)

a. Use substitution to solve (substitute for y and set them equal to each other) y = 5x - 3 y = 3x - 1 5x - 3 = 3x - 1 -3x -3x ______________ 2x - 3 = - 1 +3 +3 ______________ 2x...

Add or subtract (answer)

5√75 -4√50 + √48 = take this equation and break them into perfect square factors. 5√(25*3) -4√(25*2) + √(16*3) Perfect square can come out see below for the rules 5*5√3 -4*5√2 + 4√3 25√3 -20√2 + 4√3 Now you can old add / subtract the front...

Multiply,and then simplify if possible. Assume that all variables represent positive real numbers (answer)

Start out with distributing √2 to the bracket(√2+y√6) √2*√2+y√2*√6 √4+y√12 Now simplify by bringing out the perfect square numbers. 2+y*2√3 2+2*y√3 I hope this helps Memorize this and it really get easy 1^2 = 1 &...

what you have found is correct but i think you accidentally lost your sign -12/8 is correct which will simplify as -3/2 or -1.5 . Next you will have to write out the slope intercept form equation Y = MX + b Now plug in the order pair...

HELP ME OUT PLEASE SOLVE IT (answer)

Write this equation in Slop-intercept form and it would be the best way. Y= MX + b Where M => Slope and b => y-intercept and (0,2) is already a y-intercept Y=-3x/5 + 2 I hope this helps!!

.8 = how many minuets (answer)

the conversion from decimal to minuets is 60. 1 hours has 60 mins. so you take the .8 *60 = 48 mins so total 24 hrs and 48 mins. for example 1.5 hours so take .5*60 = 30 mins I hope this helps!

For factoring start out with ( ) ( ) double brackets factor the first term 5x^2 (which is 5x & 1x place them as indicated below) (5x )(x ) Now think of factor of -72 For example (8 & 9 , 12 & 6, 1 & 72,...

If Q(x)=x^2-5, find [Q(x)]^2 (answer)

rewrie it as you can see the form (x^2-5)^2 now write them twice (x^2-5) (x^2-5) FOIL x^4 -5x^2 -5x^2 +25 combine like terms x^4 -10x^2+25

Hello Well you are not getting the correct equation x+3y=15 3y=-x+15 now divide 3 to both x and 15 y= -x/3 +15/3 so y=-x/3+ 5 now pick points for x (i pick the easy one to solve for) and solve for y x...