Can some explain how to make this equations

I don't even know how my friends got the answers is : x = -10,-4;y = 4,2   Anyone can explain this?And i stuck with question 2 + 3y = 2,x^2+y^2+3xy=-4 , Tomorrow is the last days to sent the... more

01/15/17

In one month Catherine earned $476 and $80 was withheld for federal income tax. If she earns $699 next month how much will be withheld for federal income tax?

  I need to know how much will be withheld from her paycheck next month

01/15/17

I am a number less than 3000. When you divide me by 32, my remainder is 30. When you divide me by 58, my remainder is44. What number am I?

My son is doing 5th grade math & I don't know how to solve it  

01/15/17

How much did the owner actually lose in total?

A lady walks into a store and steals $100 from the register without the owners knowledge. She comes back 5 minutes later and buys $70 worth of goods with the $100 bill. The owner gives her $30 in... more

Find a formula when given cost and salvage value.

A manufacturer buys a new machine costing $120000 dollars. It is estimated that the machine has a useful lifetime of ten years and a salvage value of 4000 dollars at that time. Assume the value of... more

01/15/17

Explain E=mc2

Can anyone help me where Einstein's E=mc2 can be used

01/13/17

The formula y=-0.7x+33 models the percentage of men, y, smoking cigarettes x years after 1980. Use the formula to find the percentage of men who smoked in 1994

The formula y=-0.7x+33 models the percentage of men, y, smoking cigarettes x years after 1980. Use the formula to find the percentage of men who smoked in 1994

I bought 1 1\2 yds fabric. I have 0.78 yds fabric left. How many yds of fabric did I use

I bought 1.5 yds of fabric for a quilt. When I was done I had 0.78yds of fabric left over. I need to know how many yards of fabric did I use making my quilt.

01/13/17

write an equation relating rewards earned , y to total monthly purchases, x give the domain of this function.

A local credit union has a debit card that rewards 3% of your total monthly purchases

Why does the absolute value of every real positive number raised to i equal 1?

Why does the absolute value of every real positive number raised to i equal 1?

01/12/17

graph f and its inverse

So f would be a graph, and f-1 would be its inverse, im asked to graph on the same axis. How would i graph a value and its inverse on the same axis?   

Please help, I don't get the question.

One cellular phone carrier charges $26.50 a month plus $0.15 a minute for local calls. Another carrier charges $14.50 a month and $0.25 a minute for local calls. For how many minutes is the cost of... more

What is the maximum number of points 101 straight lines can intersect?

It is maybe a pattern math... But I am confused

01/12/17

Half a number is 18 more than 5 times the number. Find the number

You have to solve this question with an equation

01/12/17

Can anyone solve?

Bri bought 4 jars of jelly and 6 jars of penut butter for 19.32. Adam Bought 3 jars of jelly and 5 jars of peanut butter for 15.67. Find the cost of a jar of Peanut Butter

01/12/17

Phil has 50 nickels and dimes worth 4.15. How many dimes does he have?

I have a quiz tomorrow and I need to do well

01/12/17

A block weighing 7 N requires a force of 2.7 N to push it along at constant velocity. What is the coefficient of friction for the surface?

A block weighing 7 N requires a force of 2.7 N to push it along at constant velocity. What is the coefficient of friction for the surface?  

Can someone please help me with these three geometry questions??

Dean drew a large right triangle ABC. He found and labeled the midpoint of the hypotenuse X. He drew a line segment YX parallel to line segment BC. His next step was to draw line segment XZ... more

How much does it cost members and non members to take an aerobics class?

At a recreation and sports facility, 3 members and 3 non members pay a total of $180 to take an aerobics class. A group of 5 members and 3 non members pay $210 to take the same class. 

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