 65 Answered Questions for the topic Formulas

Formulas Science Chemistry

07/21/17

#### Solve chemical reaction for temperature of exothermic reaction (thermite)

Hi there, I I have a question about Physics/ chemistry.If I have a bag of iron oxide(lll) and powdered aluminium in the ratio of 3:1 totalling 72g, with 54g being Fe2O3 and 18g of 2Al, what would... more
Formulas

07/15/17

Formulas

05/13/16

#### Finding variable value in formulas

1. r=2s—2t. Solve for t. When I try to solve, I get (2s—r)/(2) but the book says the answer is s—(r/2)      2. (A/P) = B—1. Solve for B. Again, when I try to solve I get (A/P)+1 and the book... more
Formulas

03/22/16

#### How to solve C= -2—2(3/7)

Hi I need help solving this : C= -2—2(3/7)
Formulas

03/21/16

#### Find value of c : a=vb^2 +c^2 if a=25 and b=20

Hi, I need help with solving the equation
Formulas

03/17/16

#### G=2b(R-r). Solve for r

Hi, I need help how to solve for r
Formulas Variable

03/17/16

#### P=2l +2w If l=3.75 and P= 12.26. Solve for w

Hi, I need help solving for w
Formulas

02/28/16

#### Find value of unknown variable ?

P=2l+2w   If l=3.75 and P= 12.26
Formulas

02/28/16

#### If A=450 , h=9 find the value of b ?

in the formula A=1/2bh , If A=450 , h=9 find the value of b ?
Formulas

01/13/16

#### Percentage and math question.

I have a bill that costs 839.21, i pay 322.70, my friend pays 316.40, and her friend pays 200.11, what is the percentages that each of us pay for that bill? Also a generous person has decided to... more
Formulas Chemistry Hydrogen

09/20/15

#### Hydrogen forms compounds with C,N,O, and F that have formulas CH4, NH3,H2O, and H. Predict the formulas hydrogen forms with P,Cl ,Si , and S.

Hydrogen forms compounds with C,N,O, and F that have formulas CH4, NH3,H2O, and H. Predict the formulas hydrogen forms with P,Cl ,Si , and S.
Formulas Chemistry Compounds

09/20/15

#### Name and define two types of formilas that can be used to describe compounds

Name and define two types of formulas that can be used to describe compounds
Formulas Algerbra

09/17/15

#### What are the dimensions of the base of each footing?

The problem     Sam is filling holes with cement to make footings for his deck. Each hole is 1 1/4 feet deep and has a square base. Sam needed 22.5 cubic feet of cement to fill eight holes. What... more
Formulas

09/15/15

#### formula x=

The expression 3x2 – 6x – 105 can be used to model the height of a ball thrown in the air after x seconds. Use the quadratic formula provided below to Xigure out how long will... more
Formulas

08/24/15

#### Your rectangular yard has a length of 50 feet and a width of 45 feet you want to fence in your yard. How much fencing do you need

We are learning about dirt which is the formula of distance=rate(time)
Formulas

06/11/15

#### When to use these formulas?

Arithmetic: A. an=a1+(n-1)d   B. Sn=n(a1+an)/2   Geometric: C. an=a1(r)n-1   D. Sn=a1(1-rn)/1-r   Infinite Geometric: E. S∞ = a1/1-r   Can you give me examples of problems that will... more

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