#two variable system with substitution, i need help with 3x+5y=7 2x-5y=8

i need help with 3x+5y=7 2x-5y=8

Evaluate the circumference of circle, If the diameter of a circle is triple...

If the diameter of a circle is tripled times, the circumference is a. multiplied by 3. b. multiplied by 6. c. multiplied by 9. d. multiplied by 12. a. The formula fo

Fractions, how do you multiply fractions

how do you multiply fractions

Quadratic equations, prSQUQRE=R-5

prSQUQRE=R-5

#title., I need to follow the pattern .125,.25,.375,.5, ?

I need to follow the pattern .125,.25,.375,.5, ?

Probability, A man is known to speak truth 3 out of 4 times.He throws adi...

A man is known to speak truth 3 out of 4 times.He throws adie and reports it is a six. Find the probability that it is actually a six. Solution)  we can get a six if a man s

Evaluate this integral value, The base of a right cylinder is the circle in...

The base of a right cylinder is the circle in the xy -plane with centre O and radius 3 units. A wedge is obtained by cutting this cylinder with the plane through the y -axis in

Describe the basic concepts and terminology, Describe the Basic Concepts an...

Describe the Basic Concepts and Terminology? Somebody tells you that x = 5 and y = 3. "What does it all mean?!" you shout. Well here's a picture: This picture is what's

Arithmetic sequences and series,

Math, A screening test for a newly discovered disease is being evaluated. I...

A screening test for a newly discovered disease is being evaluated. In order to determine the effectiveness of the new test, it was administered to 900 workers; 150 of the individu