Tina pays a total of $20.51 for a house plant that costs $18.99 plus sales tax. She writes the equation $18.99 + t = $20.51 to represent t, the amount of sales tax she paid. How much tax did Tina pay?

A.$2.51
B.$2.60
C.$1.52
D.$39.50

In a class, there are 12 girls. if the ratio of boys to girls is 5: 4 how many boys are there in the class

List x1, x2, x3, x4 where xi is the left endpoint of the four equal intervals used to estimate the area under the curve of f(x) between x = 4 and x = 6. a 4, 4.5, 5, 5.5 b 4.5, 5, 5.5, 6 c 4.25, 4.75, 5.25, 5.75 d 4, 4.2, 5.4, 6

1. 2. ∠b and ∠y are right angles. 3.? 4.? which two statements are missing in steps 3 and 4? ∠x ≅ ∠c △abc ~ △zyx by the sas similarity theorem. ∠b ≅ ∠y △abc ~ △zyx by the sas similarity theorem. = 2 △abc ~ △zyx by the sss similarity theorem. = 2 △abc ~ △zyx by the sss similarity theorem.