Which class has 40% girls? Class A: 40 out of 110 Class B: 100 out of 140 Class C: 48 out of 120 Class D: 42 out of 100

What does concave mean

Graph the system below and write its solution Y=1/2x+2 2x+y=7

Use the distributive property to match equivalent expressions. -7 (-4 + x) 28 + 7x 7 (-4 - x) -28 + 7x 7 (4 + x) -28 - 7x -7 (4 - x) 28 - 7x

Which system is equivalent to y=9x2. [x+y=5

To make a batch of purple frosting, you need 28 drops of blue food coloring and 21 drops of red food coloring. What is the ratio of red drops to blue drops in simplest form?

How many solutions does 25-4x=15-3x+10-x have

A certain measurement must be between 3.64 and 4.28 centimeters. Which number is greater than 3.64 and less than 4.28?

Using the exponential regression model, which is the best prediction of the wavelength of the key that is 8 above the A above middle C? 49.31 cm 49.44 cm 49.73 cm 49.78 cm

What single percentage change is equivalent to a 15% decrease followed by a 16% decrease?

Use substitution to solve the linear system of equations. x = 4 -y = 1/2x (4, - 2) (-2, 4) (4, 2) (2, - 4)