math without calculators

Stephanie uses the expression m + 4 to calculate the amount owned by her brother, Tim, where m represents the amount owned by Stephanie. How much does Tim own if Stephanie owns $7? => $13 or $10 or $11 or $8..

The diameter of a circular lawn is 18 m. Calculate its area. [Take π = 3.14.] => 254.34 m 2 or 28.26 m 2 or 1017.36 m 2 or 56.52 m 2..

Express the exponential equation 2 x + 3 = 11 in calculation-ready form. Do not solve. => log 11 - 3log 2 log 2 or 3log 2 - log 11 log 2 or log 11 + 3log 2 log 2 or - 3log 9 log 2..

Katie calculates the area of an equilateral triangle using the formula A = ( 1 2 ) ap . Tim calculates the same area using the formula A = ( 1 4 ) s ² 3 . Do they both get the same answer?. => Yes or No..

Lily read 61 pages of a book containing 93 pages. Choose the number sentence that helps you to calculate the number of pages, n , to be read to complete the book. => 61 - n = 93 or 93 - 61 = n or 61 + 93 = n or n + 93 = 61..

The reptile population in a national park is given by the equation 60 + 7 x , where x represents the number of years. Calculate the reptile population after 3 years. => 91 or 71 or 101 or 81..

Approximate the solution of the linear equation 3.62(1 - 5 x ) = 28.3 - 6.8 x by using a graphing calculator. => - 2.2 or 2.8 or - 2.8 or 2.2..

Jeff used the relation v = i r to calculate the resistance, r , of a copper wire, where i is the current and v , the constant potential. Find the relationship between the current in the wire and the resistance of the wire. => Current in the wire is inversely proportional to the resistance..

Graph y = ( 1 2 ) x using a graphing calculator. => Graph 3 or Graph 1 or Graph 4 or Graph 2..