47 Greta ran 1 kilometers at the track. After that, she walked 1-
23
100
100
kilometers around the track to cool down. How many kilometers
did Greta run and walk in all? Simplify the answer if possible.
A
7
km
10
B
7
2
10
km
69
2
100
km
71
2
100
km

Match each equation with the operation you can use to solve for the variable. subtract 10. divide by 10. divide by 5. subtract 18. multiply by 10. add 18. add 10. multiply by 5. 5 = 10p arrowright p + 10 = 18 arrowright p + 18 = 5 arrowright 5p = 10 arrowright

20 solve 2(4 x + 3) < 5 x + 21. a) { x | x < 9} b) { x | x > -5} c) { x | x > -9} d) { x | x < 5}

What is the length of the segment, endpoints of which are intersections of parabolas y=x2? 11 4 x? 7 4 and y=? 7 8 x2+x+ 31 8 ?