Ms. claudio and ms. yee took their students to the winter festival. there were a total of 68 students in attendance. in group a , twenty three students rode the polar express and paid $6.75 each. in group b, twenty five students rode rudolph’s reindeer ride and pod $4.50 each. in group c, 20 students rode both rides. what was the total cost of each group’s amusement ride ?

407.25

Step-by-step explanation:

23 x 6.75 =155.25     25 x 4.50 = 112.50       20 x 6.75+4.50=139.50    112.50+155.25+139.50= 407.25  HOPE IT HELPS!!! : )

x = ±sqrt(10)

step-by-step explanation:

5 - 2x² = -15

subtract 5 from each side

5-5 - 2x² = -15-5

-2x^2   = -20

divide by -2 on each side

-2x^2   /-2= -20/-2

x^2 =10

take the square root on each side

sqrt(x^2 )=±sqrt(10)

x = ±sqrt(10)

check:

5 - 2x² = -15

+sqrt(10)

5 - 2(sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15

-sqrt(10)

5 - 2(-sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15

1. sometimes

2. never true

3. sometimes

step-by-step explanation:

these are pretty self explanatory if you know what supp right and com angles are