To make one cheese sandwich, Tina uses one bread roll and two cheese slices. Pack of 15 bread rolls £1.91 . Pack of 20 cheese slices £2.23 . She is going to buy enough packs to have exactly twice as many cheese slices as bread rolls. Make more than 100 cheese sandwiches. Work out the least amount she can spend.

The average human heart beats 1.15 \cdot 10^51.15⋅10 5 1, point, 15, dot, 10, start superscript, 5, end superscript times per day. there are 3.65 \cdot 10^23.65⋅10 2 3, point, 65, dot, 10, start superscript, 2, end superscript days in one year. how many times does the heart beat in one year? write your answer in scientific notation, and round to one decimal place.

Consider the function represented by the equation 1/2 j + 1/4 k equals 3 which shows the equation written in function notation with j as the independent variable

Four quarts of a latex enamel paint will cover about 200 square feet of wall surface. how many quarts are needed to cover 98 square feet of kitchen wall and 52 square feet of bathroom wall