Math

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1. algebra

   solve by substitution 5x-2y = -5 y - 5x = 3 could someone take a min a show me how to do this problem by steps so i can do the rest of my problems and wait a min so i may ask questions. I m failing my algebra class and desparately

   asked by Tammy Evert on August 10, 2006

2. Math

   Please help me solve these problem i have no idea how to do this. 720m/d= ____ m/min 1.5gal/min=______ qt/h 32yd/min=_____in./s 0.85km/s=______m/min 80mi/h=_______ft/s 20fl oz/min=_______qt/day

   asked by Anonymous on May 2, 2011

3. math

   289 min = 4 hr and 49 min 213 min = 3 hr and 33 min 345 min = 5 hr and 45 min 197 min = 3 hr and 17 min I have to change these minutes on the left to hours and minutes. could you check if I have them correctly. Thank you for your

   asked by st on April 26, 2010

4. math

   amos is using a computer program to graph the function N(p)=-73p-2818. He wants to see the intercepts. Which minimum values should he use to set up the viewing window? A) X min:-80, Y min:-2500

   asked by Anonymous on April 2, 2016

5. Math

   4018 PTS Billymkhoi HIGH SCHOOL MATHEMATICS 10+5 pts At the instant that a cake is removed from the oven, the temperature of the cake is 350°F. After 10 minutes, the cake's temperature is 200°F. If the temperature of the room is

   asked by Anonymous on February 28, 2016

6. Calculus

   RP^2=RQ^2 + QP^2 -2(RQ)*(QP)cosQ (1) QP = 24 (km/min) t (2) Diffentiate both sides w.r.t. the time t: 2 RP* d Rp/dt = 2 t [24 (km/min)]^2 -2(RQ)* 24 (km/min) cosQ (3) Using (1) and (2) you find out what RP is at t = 4 minutes. You

   asked by Count Iblis on November 14, 2006

7. Physics

   From t = 0 to t = 5.00 min, a man stands still, and from t = 5.00 min to t = 10.0 min, he walks briskly in a straight line at a constant speed of 2.3 m/s. (a) What is his average velocity vavg in the interval 2.000 min to 7.90

   asked by Natalie on September 5, 2011

8. chemistry

   A particular radioactive substance has a half-life of 4 minutes. How long will it take for 250 g of this radioactive material to decay to less than 0.1g? 24 min 36 min 40 min 48 min 72 min I got 32 min but that not one of the

   asked by Anonymous on December 5, 2011

9. accountung

   a fixed mo fee of 22.00 up to 510 min. then .05 per min thereafter if i use less than 510 min i still pay 22.00 per month based on 100 min/ 240 min. 540 min.

   asked by LALA on May 10, 2016

10. math

    Please show me how to solve using elimination: It takes a florist 3 h 15 min to make 3 small centerpieces and 3 large centerpieces. It takes 5 h 20 min to make 4 small center pieces and 7 large centerpieces. How long does it take

    asked by Jane on December 28, 2011

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