I have a question involving simultaneous equations to find points on lines.

the two equations are as follows: y=3x^2-2x-20 and y=2x-5     You have to substitute one equation into another work out the two answers and then use the answers sub them into one of the... more

08/17/17

Physics questions NEED HELP

1.Making estimates. The human eye can detect as few as 9760 photons per second entering the pupil. About how much energy is this, per second? (Assume the photons have a wavelength of 300... more

08/17/17

a painting is a square, 2x+8 inches on each side. find and expand an expression for the area of the painting.

answer should be simplified with all likes terms combined. thank you, much needed.

08/17/17

What is the equation for the following. Algebra translation.

How many copies can be made if there is a $2 charge to use the copy machine and copies are 5 cents a piece?   At the mall soda costs $1.50 and refills are 75 cents. How much does it cost to buy a... more

How do I get numbers 1-20 using six twos?

Question is above.  How to use 6 2's to get 1-20

Calculus question

A 7m ladder is leaning against the wall. When the top of the ladder is slipping down at a rate of 2m/s, how fast is the bottom moving when it is 4m away from the wall?   HELP!?

Ted says that 3 tenths multiplied by 100 equals 300 thousandths. Is he correct? Use a place value chart to explain your answer.

I dont know how to make the place value chart with the numbers in the right places.

08/16/17

five times the sum of a number and 4 is negative 15

algebra 1 math  

08/16/17

what is the third number in the sequence?

the sum of 5 consecutive integers is 120.

08/16/17

I have a calculus review test and our teacher gave us a problem I can't crack

(1/(a+h) - 1/a)/h

08/16/17

Word Problem

A motorboat can maintain a constant speed of 40 miles per hour relative to the water. The boat makes a trip upstream to a certain point in 33 minutes; the return trip takes 22 minutes. What is the... more

08/16/17

Word Problem

How many gallons of a90% antifreeze solution must be mixed with 6060 gallons of 20% antifreeze to get a mixture that is 80% antifreeze? Use the six-step method.

08/16/17

Word Problem

How much water should be added to 1 gallon of pure antifreeze to obtain a solution that is 95% antifreeze?

The Edges of a cube are each 14 inches long . What is the ratio of the number of square inches in the total....

please help me with this problem, I only solved the first part of it but i'm getting confused with the rest Thank you!   The Edges of a cube are each 14 inches long . What is the ratio of the... more

Is there any possible way for me to obtain the length of the side of a right triangle if i only know the angles measures (90,60,30)

I have a right triangle, but i only have the measures for its angles (90,60,30) Is there any way for me to find the length of one side

How tall is Susan's sister?

Susan is 166 cm tall and she casts a shadow about 55 cm long. Her sister, who is standing next to her, casts a shadow about 35 cm long. About how tall is Susan's sister?

Differentiation Confusion

If we expand (3x^2 - 1)^4 we get,   (3x^2 - 1)^4 = 81x^8 - 108x^6 + 54x^4 - 12x^2 + 1   If we derive (3x^2 - 1)^4 we get, (via chain rule)   24x(3x^2 - 1)^3   However if we derive (81x^8 -... more

08/16/17

Find the y-intercept of the line 7y-8x+12=0

4/5 -3/2 7/12 8/7 -12/7  

08/16/17

What is 467 divided by 17? Express answer as a mixed number?

19 1/17 28 4/18 27 8/17 17 1/5 31 3/2 How do I change a number into a mixed fraction? Thank you

Which of the following quadratic equations has only one root?

4x2-12x+9=0 x2-3x+3=02x2-x-3=0 2x2-5x+3=0x2-12x+9=0  

08/15/17

What is the increase in percentage?

In addition to an employee's $300 weekly salary, management has approved a 6% pay increase plus an extra $12 per week for travel expenses. In total, the employee will be receiving a __________... more

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