# Posts by Cecelia

Total # Posts: 21

**math**

In a problem on percentages there are three quantities that are involved. These are the base, the amount, and the rate percent. Express the relation between them in the form of an equation and explain with examples how to find each one of them given the other two quantities

**math**

In a problem on percentages there are three quantities that are involved. These are the base, the amount, and the rate percent. Express the relation between them in the form of an equation and explain with examples how to find each one of them given the other two quantities

**intermediate algebra**

0.3x + 0.2y=5, 0.5x + 0.4y=11 using the substitution method

**Chemistry**

A 36.0mL sample of 1.20 M KBr and a 56.0mL sample of 0.700 M KBr are mixed. The solution is then heated to evaporate water until the total volume is 60.0mL. What is the molarity of the KBr in the final solution?

**Chemistry**

A 36.0mL sample of 1.20 M KBr and a 56.0mL sample of 0.700 M KBr are mixed. The solution is then heated to evaporate water until the total volume is 60.0mL. What is the molarity of the KBr in the final solution?

**chemistry**

The mass percentage of chloride ion in a 29.00 sample of seawater was determined by titrating the sample with silver nitrate, precipitating silver chloride. It took 42.42 of 0.2998 silver nitrate solution to reach the equivalence point in the titration.

**Math**

Multiply whole number by denominator and add numerator. Put this number as numerator with original denominator. For example: 9 2/11 would be 9*11 which is 99 add that to 2, which gives you 101. SO final answer is 101/11. 1 7/15= (15*1) + 7=22 SO 22/15

**Introductory Physics**

I am really nervous about mathematics, so I just want to make sure I am doing these problems correctly. I figure if I am getting the incorrect answer, I must be doing them incorrectly and need to work on them some more. I THINK I have them correct, but I just want to verify. ...

**Math115**

Solve by the elimination method. 5x-15y=2 and 5x-15y =3 Is there a solution of an ordered pair? Are the infinitely many solutions? or is there no solution? I got that there is no solution.

**maths**

use the quotient rule to differentiate the following k(t)=e^3t/4-t^2 (-2<t<2)

**maths**

find the stationary points of the following f(x)=x^3-3x^2-24x-7

**maths**

finf the definite integral of the following h(u)=cos^2(1/8*u) (8th*u)

**maths**

find the indefinite integral of the following g(x)=21-12x^3/x (x>0)

**maths**

find the indefinite integral of the following f(t)=6cos(3t)+5e^-10t

**maths**

find the y coordinates of each stationary points f(0). f(x)=x^3-3x^2-24x-7

**maths**

solve the following simultaneous equations using matrices 3x-6y=24 and -4x+5y=-23

**maths**

Given g(x)= 1/3(x-2)^2-3 2<x<5 state the domain and image set g^-1 and find its rule

**maths**

given function G(x)=1/3(x-2)^2-3 2<x<5 sketch a graph of function y=g^-x and find the inverse function g^-1

**maths**

the equation of the circle is x^2-8x+y^2+4y+11=0 find any coordinates that intersect the line y=-x-1

**maths**

given the following equation for a circle x^2-8x+y^2+4y+11=0 find its centre and radius

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