Evaluate 7r-15/8 when r=3 and 8=5

A triangle has a base of 17 inches and a area of 127.5 square inches. What is the height of the triangle?

Kaleem wanted to draw a triangle where the sides measured 5 cm, 8 cm, and 7 cm. How many unique triangles could Khaleem draw that fit these dimensions? A. 1 B. 2 C. 3 D. 4

There are 12 students on the basketball team. In how many ways can the coach set up the starting lineup of 5 players?

How to do number strings

sean buys 7 postcards to send to his friends. He also buys a t-shirt for $15.89 to give to his best friend. He pays a total of $19.32. Write an equation to find how much each postcard costs.

A rectangle has length (4x+ 5) and breadth 3x. Find the area of the rectangle.

A pattern has 1,000 identical circles. If 665 of the circles are orange, what decimal represents the part of the pattern that is orange? Why? A. 665 B. 66.5 C. 6.65 D. 0.665

3.) What is h (5) ? What does this mean?

I was wondering how to find these things about the Singapore flyer (ferries wheel) ? The measure of the central angle in degrees, the measure of the central angle in radian, the arc length between two cars, and the area of a sector between two cars?

What is Charlotte has 12 T-shirts one fourth of her two shirts are green how many of charlottes T-shirts are green?