kelly went back-to-school shopping this weekend. she spent $225 on jeans and
shirts. she bough...
Mathematics, 15.10.2019 20:30 eweqwee4163
kelly went back-to-school shopping this weekend. she spent $225 on jeans and
shirts. she bought a total of 14 items, with jeans costing $18 and shirts costing
$15. how many shirts did she buy?
Answers: 1
Mathematics, 21.06.2019 19:00
The width of a rectangle is 20 units. can the perimeter p of the rectangle be 64 units when its length x is 11 units? no, because p = 2x + 2(20) no, because p ā 2x + 2(20) yes, because p ā 2x + 2(20) yes, because p = 2x + 2(20)
Answers: 1
Mathematics, 21.06.2019 19:50
Prove (a) cosh2(x) ā sinh2(x) = 1 and (b) 1 ā tanh 2(x) = sech 2(x). solution (a) cosh2(x) ā sinh2(x) = ex + eāx 2 2 ā 2 = e2x + 2 + eā2x 4 ā = 4 = . (b) we start with the identity proved in part (a): cosh2(x) ā sinh2(x) = 1. if we divide both sides by cosh2(x), we get 1 ā sinh2(x) cosh2(x) = 1 or 1 ā tanh 2(x) = .
Answers: 3
Mathematics, 21.06.2019 22:30
3. a sum of $2700 is to be given in the form of 63 prizes. if the prize is of either $100 or $25, find the number of prizes of each type.
Answers: 1
Mathematics, 21.06.2019 23:00
Sam is picking fruit from a basket that contains many different kinds of fruit. which set of events is independent?
Answers: 1
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