Mrs. sahd distributes pencils and papers to students in the ratio of 2 pencils to 10 sheets of paper. three of these ratios are equivalent to 2/10. which one is not? a. 1/5 b. 7/15 c. 4/20 d. 8/40?

The ratio that is not equivalent is B. 7:15

The reason why it's not equivalent because for the other ratios:

1:5 could be turned into 2:10 by multiplying 1 and 5 by 2.

4:20 could turn into 2:10 by dividing both numbers by 2.

And 8:40 could be divided by 4 to get 2:10.

But you can't do anything to 7:15 to make it 2:10.

18 units²

step-by-step explanation:

first let's find altitude bd using the distance formula

d = √((y₂ - y₁)² + (x₂ - x₁)²)

bd = √((0 - -3)² + (0 - 3)²)

bd = √18

given the placement of points a and c, we can denote that point d bisects segment ac.

we will call ac the base.

using the distance formula

ac = √((0 - 6)² + (-6 - 0)²)

ac = √72

knowing our base and our height, we can plug these into our triangle area formula

area = (b * h)/2

area = (√18 * √72) / 2

area = (√1296) / 2

area = 36 / 2

area = 18 units²

a) is $10.34

b) is 6 toppings