Number of results: 44
My teacher said we are supossed to solve this using systems of equations: Let a, b, and c be real numbers such that a-7b+8c=4 and 8a+4b-c=7. Then a^2-b^2+c^2= ? can someone please help?! i don't know what method to use to solve this or where to start
September 13, 2009 by chrissy
4. Evaluate the following, give exact value when possible. a. sec(225) = 2.72 b. sin(-15) – 0.065 c. sin(75) = -0.39 Are these the correct answers? I feel like there should be an equation... I'm confused
January 19, 2011 by Chelsea
A circular oil slick is expanding with radius, r in yards, at time t in hours given by r=2.5t−0.3t2, for 0≤t≤10. Find a formula for the area in square yards, A=f(t), as a function of time. f(t)= HELP PLEASE!
March 1, 2016 by Anonymous
MATHHH HELP ASAP
3. The Step-And-Leaf Plot below could NOT represent which of the following? 1 | 1 2 2 7 7 2 | 1 4 4 7 3 | 3 5 6 8 9 Ket: 3 | 5 means 3.5 A. The average number inches rain in june B. The height of plant seedlings, in inches C. The weight of phonebooks, in pounds d. The height ...
March 17, 2015 by Anonymous
what is PSU's (penn state university)"annual scholarship" i have to fill out the yearly tuition & the room and board amount which all equals to $36,144. I need the annual scholarship amount but idk where to find that information...
May 30, 2011 by surfsupmel
A hockey game is preparing for a group photo. The team has 1 goalie, 4 defense, and 7 forwards. The photographer wants two rows of six players. How many ways can the team arrange six players in the front row with at most 2 defense?
May 11, 2014 by Leah
A conveyor belt sushi restaurant lets you choose what you want to eat from variously-coloured plates that go by. You pay based on the colours of the plates. After dinner, 1 green plate, 4 yellow plates, and 2 blue plates. Use the Fundamental Counting Principle to count how ...
May 10, 2014 by Leah
math grade 10 mathhh
A map shows a main gas pipeline running straight from A(45,60) to B(65,40) a) Is the point C(63,54) on the branch pipeline? Explain your reasoning b) What is the shortest route for connecting point C to the main pipeline.Explain **OMGGGG PLZZZ HELPPP, THANK YOUUUUUU!!!!!!!!!!!
December 23, 2009 by alyssa
Sally deposited $3600 and the annual rate of interest is 6.5%. What is the interest amount for a 30-month period? I = prt. I = amt of interest p = principal r = rate (0.065 per year) t = time in years = 2.5 years I = 3600*0.065*2.5 = ??
March 31, 2007 by Cindy
MATHHH!!!! PLEASE HELP
Monico needs to mix a 40% ethanol solution with a 60% ethanol solution to create 100 millileters of a 54% solution. How many millileters of each solution must Monico use?
October 30, 2012 by Anonymous
MATHHH!!!! PLEASE HELP
An eastbound train and a westbound train meet each other on parallel tracks heading in opposite directions. The eastbound train travels 12 miles per hour faster than the westbound train. After 1.5 hours, they are 174 miles apart. At what speeds are the two trains traveling? ...
October 24, 2012 by awade
A boat travels down the river in 2.3 hours. The return trip up river takes 3.7 hours. A one way trip down or up river is a distance of 26 miles. If the boat is traveling at maximum speed, what is the boats speed measured in waters with no current? You need to use systems to ...
December 13, 2012 by erin
Mike wants to buy a snowmobile. His parents decide to lend him $9 000 at 10%/a, compounded monthly, if he agrees to repay the amount by making equal monthly (at the end of the month) payments for five years. d. Write the series that represents the present value of the annuity...
January 17, 2011 by Michelle
A paper bag contains a mixture of three types of treats: 12 granola bars, 10 fruit bars, and 8 cheese strips. Suppose that you play a game in which a treat is randomly taken from the bag and replaced, and then a second treat is drawn from the bag. You are allowed to keep the ...
May 10, 2014 by Leah
Is this answer correct? Jeremy is in Grade 8. He has a paper route and wants to save for his college education. He determines that he has $100 per month to put into an account at 6%/a compounded monthly. How much will he have at the end of five years for his college education...
January 16, 2011 by Alicia
A floor refinishing company charges $1.91 per square foot to strip and refinish a tile floor for up to 1000 square feet. There is an additional charge of $250 for toxic waste disposal for any job which includes more than 150 square feet of tile. (a) Find an equation for the ...
March 13, 2016 by jen
Can someone explain to me.... when you are graphing number sets.... when do you use open/ closed cirles.... When do you use arrows?... What are intergers??? Thanks, ummm kbye<33=]]]] i dont like mathhh its kinda gayy can u stop... you are not helping... BYE! I'm not exactly...
September 13, 2006 by Capi