This mathematics problem involves applying core mathematical principles and formulas. Below you will find a complete step-by-step solution with detailed explanations for each step, helping you understand not just the answer but the method behind it.
ScanSolve AI Answer
Here are the solutions to your questions: 1. To determine the total cost, multiply the quantity of petrol by the price per litre. Total Cost = 25 litres × R25.39/litre Total Cost = R634.75 It will cost R634.75 to put 25 litres of petrol. 2. To calculate the call cost, multiply the rate per minute by the duration of the call. Call Cost = R2.25/minute × 3(1)/(2) minutes Call Cost = R2.25/minute × 3.5 minutes Call Cost = R7.875 Call Cost ≈ R7.88 A 3(1)/(2) minute call will cost R7.88. 3. First, convert the mass of potatoes from grams to kilograms. Then, multiply by the price per kilogram. Step 1: Convert 500 g to kg. 500 g = (500)/(1000) kg = 0.5 kg Step 2: Calculate the cost. Cost = 0.5 kg × R62.00/kg Cost = R31.00 Luvo will pay R31.00 for 500 g of potatoes. 4. To find the cost of each packet, divide the total cost by the number of packets. Cost per packet = R230.908 packets Cost per packet = R28.8625 Cost per packet ≈ R28.86 Each packet of biscuits costs R28.86. 5. To calculate the average speed, divide the total distance by the total time taken. Average Speed = DistanceTime Average Speed = 300 km3 hrs Average Speed = 100 km/hr Sipho's average speed is 100 km/hr. 6.1 To write the cost of coffee as a unit ratio, express the cost per 1 kg. Cost per kg = R155.001.5 kg Cost per kg ≈ R103.33/kg The unit ratio is R103.33 : 1 kg. 6.2 To write the cost of margarine as a unit ratio, express the cost per 1 kg. First, convert 250 g to kg. Step 1: Convert 250 g to kg. 250 g = 0.25 kg Step 2: Calculate the cost per kg. Cost per kg = R25.990.25 kg Cost per kg = R103.96/kg The unit ratio is R103.96 : 1 kg. 7.1 To determine the cheaper buy for Bovril, calculate the price per gram for each option. Step 1: Calculate the price per gram for 125 g at R35.99. Price per gram (Option 1) = R35.99125 g ≈ R0.28792/g Step 2: Calculate the price per gram for 250 g at R62.99. Price per gram (Option 2) = R62.99250 g ≈ R0.25196/g Comparing the prices per gram, R0.25196/g is less than R0.28792/g. The cheaper buy is 250 g of Bovril at R62.99. 7.2 To determine the cheaper buy for maize meal, calculate the price per kg for each option. Step 1: Calculate the price per kg for 2.5 kg at R45.99. Price per kg (Option 1) = R45.992.5 kg = R18.396/kg Step 2: Calculate the price per kg for 10 kg at R199.95. Price per kg (Option 2) = R199.9510 kg = R19.995/kg Comparing the prices per kg, R18.396/kg is less than R19.995/kg. The cheaper buy is 2.5 kg of maize meal at R45.99. Got more? Send 'em.