Answer:
1309 marbles
Step-by-step explanation:
- Simon has: 727 - 145 = 582 marbles
All together:
- Kadon marbles + Simon marbles
- 727 marbles + 582 marbles
Its 12 because you do 10.5/21=x/24
Let x be the score Amaya gets on the final test. She wants her average of all 3 tests to be between 80 and 89:
<span>80 ≤ (78 + 91 + x) / 3 ≤ 89 </span>
<span>Multiply everything by 3: </span>
<span>240 ≤ 78 + 91 + x ≤ 267 </span>
<span>240 ≤ 169 + x ≤ 267 </span>
<span>Subtract 169 from everything: </span>
<span>240 - 169 ≤ x ≤ 267 - 169 </span>
<span>71 ≤ x ≤ 98 </span>
<span>Answer: </span>
<span>She needs to score between 71 and 98 to get a B for the course.</span>
Answer:
45
Step-by-step explanation:
F(-4). F(x) = 2x^2 - x + 9
