How do you find the sales tax? I'm in 7th Grade by the way.

After removing all of the clubs from a deck of cards, you are left with a 39 card deck with Hearts, Diamonds, and Spades. Answer the following questions assuming that after each draw of a card, that card is returned to this deck and reshuffled.

279.5 divided by 2.6

While shopping in France, Johnny notices the cost of apples is 3.20€/kg. Johnny isn't familiar with Euros or kilograms, and needs to convert the unit price into dollars per pound. You may assume the conversion rate from dollars to Euros is $1 to 0.

A football team loses 3 yards on one play and 6 yards on another play write a sum of negative intergers to represent this situation find the sum and explain how it's is related to the problem

If matrix Ais a 6 x 5 matrix, which order of matrix can be multiplied by matrix A?

5 ducks to 30 geese What's the meaning?

Given the explicit formula for an srithmetic sequence find the first five terms and the 52nd term

Negative three plus x equals eleven

A rectangular room has a length of 20 ft, width of 48 ft, and height of 10 ft. Use the Pythagorean Theorem to find length BC and length AB. Round to the nearest tenth, if necessary.

The Hu family goes out for lunch, and the price of the meal is $58. The sales tax on the meal is 7%, and the family also leaves a 15% tip on the pre-tax amount. What is the total cost of the meal?