Select all of the following that are quadratic equations.

3x2 + 5x - 7 = 0

x3 - 2x2 + 1 = 0

2x - 1 = 0

5x2 + 15x = 0

6x - 1 = 4x + 7

x2 - 4x = 4x + 7

Mark walks to school in 3 minutes. It takes Tom 4 times as long to walk to school as it does Mark. How long does it take Tom to walk to school? minutes

A giraffe can run up to 46.93 ft. per second. How far could a giraffe run in 1.8 seconds? Justify your answer

What is the solution to бn + 1 = 2n - 7

These two scalene triangles are similar with a scale of 7:47:4. What is true about these figures?

If there are 20 beats in 45 seconds, how many beats are there in 60 seconds?

28,062 divided by 3

Using measures of central tendency: 5. Write and solve an equation to find the value of "x". 3.8, 4.2, 5.3, x; mean 112 7. Write and solve an equation to find the value of "x". 100, 121, 105, 113, 108, x; mean 112 9. Find the range.

Add. Question 4 3/8x^3 + 7/2x

Mina picks 63 flowers from her garden. She can put 10 flowers in each vase how many vases can she fill. how many extra flowers will she have?

Find the ratio a:b, if it is given that ... 5a+3b=6b