Find the value of a so that the lines with the given equations are perpendicular:

y=2x+13

6y+ax = 6.

Lisa says that 42 is a 2 digit odd number that is composite. Is she correct?

The fabric for Isabella's new dress is sold by the yard. The pattern for the dress requires 8 feet of fabric. How many yards of fabric does Isabella need to purchase if 1 yard is equal to 3 feet? 1 third yard 2 2 over 3 yards 6 yards 24 yards

Phyllis and Chen are saving money to go to a football game. Each friend starts with some money and saves a specific amount each week. Phyllis made a graph to show the total she has saved at the end of each week.

At a restaurant, the bill comes to $60. If you decide to leave a 14% tip, how much is the tip?

Lucia hit a golf ball 240 feet. How many yards did she hit the ball? A) 80 yards B) 60 yards C) 120 yards D) 300 yards

In a 30-60-90 triangle, how many sides do you need to know in order to determine the remaining sides? 2 0 1 3

If x is the probability of an impossible event, then which of the following is true? x < 0 x = 0 x > 1

The length of a rectangle is - x - 1 and it's width is 5x+7. Find the perimeter of the rectangle.

Suppose you have an empty jar with a mass of 196.0 g. After filling the jar with jelly beans the mass of the jar + jelly beans is 323.8 g. If the average mass of a Jelly bean is 1.23 grams, estimate how many Jelly beans were added to the jar.

Can anyone simplify? - (2z + 3w - 5t) + 6 (4z - 8w + 2t)