• ### Molarity q?

1 answer · Chemistry · 8 months ago
• ### A parabola has the equation y= (ax+b)(x+c) when x=5 its graph cuts the x axis and when y = -10 it cuts the y axis?

1. Show that y=ax^2 + (2-5a)x-10 2.Express the discriminant in terms of a 3. IF the discriminant is equal to 4, find the equation fo the parabola and the coordinates of its other x intercept
1. Show that y=ax^2 + (2-5a)x-10 2.Express the discriminant in terms of a 3. IF the discriminant is equal to 4, find the equation fo the parabola and the coordinates of its other x intercept
2 answers · Mathematics · 8 months ago
• ### What is a term for "a small but definite amount of energy"?

5 answers · Words & Wordplay · 9 months ago
• ### Find a value for k in the following simultaneous equations that can a)be a unique solution b)have infinitely many solutions c)no solution?

-2x+ky=k+2 (k+1)x-6y=-10
-2x+ky=k+2 (k+1)x-6y=-10
1 answer · Mathematics · 9 months ago
• ### Give the rule for y against x^2 which is marked at the point 2,6?

7 answers · Mathematics · 10 months ago
• ### If like charged particles repel, why do electrons appear in pairs in the model of an atom?

5 answers · Chemistry · 10 months ago
• ### Linear Problem?

Given that the line ax+by=c is the perpendiculat bisector of the line segment CD where C is the point (-2,-5) nad D is the point (2,5) find the smallest non-negative values possible for the intergers a,b and c.
Given that the line ax+by=c is the perpendiculat bisector of the line segment CD where C is the point (-2,-5) nad D is the point (2,5) find the smallest non-negative values possible for the intergers a,b and c.
3 answers · Mathematics · 10 months ago
• ### The weight (w) that can be supported by a wooden beam varies directly as the square of its diameter (d) and inversely as its length (l)?

a) What percentage increase in the diameter would be necessary for a beam twice as long to support an equivalent weight? b) what percentage change in the weight would be capable of being supported by a beam three times as long with twice the diameter?
a) What percentage increase in the diameter would be necessary for a beam twice as long to support an equivalent weight? b) what percentage change in the weight would be capable of being supported by a beam three times as long with twice the diameter?
2 answers · Mathematics · 10 months ago
• ### The weight (w) that can be supported by a wooden beam varies directly as the square of its diameter (d) and inversely as its length (l)?

a) What percentage increase in the diameter would be necessary for a beam twice as long to support an equivalent weight? b) what percentage change in the weight would be capable of being supported by a beam three times as long with twice the diameter?
a) What percentage increase in the diameter would be necessary for a beam twice as long to support an equivalent weight? b) what percentage change in the weight would be capable of being supported by a beam three times as long with twice the diameter?
1 answer · Physics · 10 months ago
• ### Quick question on percentage changes in variation?

3 answers · Mathematics · 10 months ago
• ### Math help pls?

The distance (d) to the visible horizon varies directly with the square root of the height (h) of the observer above sea level. An observer 1.8m tall can see 4.8km out to sea when standing on the shoreline. a) how far could the person see if they climbed a 4m tower? b)if the top of a 10m mast on a yacht is just visible to the observer in the... show more
The distance (d) to the visible horizon varies directly with the square root of the height (h) of the observer above sea level. An observer 1.8m tall can see 4.8km out to sea when standing on the shoreline. a) how far could the person see if they climbed a 4m tower? b)if the top of a 10m mast on a yacht is just visible to the observer in the tower, how far out to sea is the yacht. I've tried to find k using 4800=k(sqrt(1.8)) But the value seems unrealistic and doesn't provide the correct answer where am i going wrong? answer to a is 8.616km and answer to b is 19.93km
3 answers · Mathematics · 11 months ago
• ### Question on proportional math?

The distance (d) to the visible horizon varies directly with the square root of the height (h) of the observer above sea level. An observer 1.8m tall can see 4.8km out to sea when standing on the shoreline. a) how far could the person see if they climbed a 4m tower? b)if the top of a 10m mast on a yacht is just visible to the observer in the... show more
The distance (d) to the visible horizon varies directly with the square root of the height (h) of the observer above sea level. An observer 1.8m tall can see 4.8km out to sea when standing on the shoreline. a) how far could the person see if they climbed a 4m tower? b)if the top of a 10m mast on a yacht is just visible to the observer in the tower, how far out to sea is the yacht. I've tried to find k using 4800=k(sqrt(1.8)) But the value seems unrealistic and doesn't provide the correct answer where am i going wrong? answer to a is 8.616km and answer to b is 19.93km
1 answer · Mathematics · 11 months ago
• ### Find the values of m and n to give a unique solution, a infinite number of solutions and no solution?

3x+2y=-1 mx+4y=n
3x+2y=-1 mx+4y=n
2 answers · Mathematics · 11 months ago
• ### Using px+5y=q and 3x-qy=5q, determine the values of p and q so the system of equations will have infinitely many solutions?

6 answers · Mathematics · 11 months ago
• ### For what value of p will the line 2x+3y=23 and 7x+py=8 not intersect? Confused on what to do after simplifying them?

6 answers · Mathematics · 11 months ago
• ### Kitchen Clock Math Problem?

Chan's kitchen clock stopped at 2:00pm. Not knowing the correct time, he replaced the battery but did not adjust the time. He then rode to visit Avon, arriving at 3:15pm and leaving at 4:45pm. If the ride each way took the same time, and when he arrived home the kitched clock showed 5:30, how long had the clock been stopped for.?
Chan's kitchen clock stopped at 2:00pm. Not knowing the correct time, he replaced the battery but did not adjust the time. He then rode to visit Avon, arriving at 3:15pm and leaving at 4:45pm. If the ride each way took the same time, and when he arrived home the kitched clock showed 5:30, how long had the clock been stopped for.?
2 answers · Mathematics · 11 months ago
• ### Math Puzzle?

If 1*3=8 2*4=6 2*9=1 3*6=3 What does 4*4=?
If 1*3=8 2*4=6 2*9=1 3*6=3 What does 4*4=?
2 answers · Mathematics · 12 months ago
• ### If 1*3=8 2*4=6 2*9=1 3*6=3 What does 4*4=?

2 answers · Mathematics · 12 months ago