Answer:
it opens up, when the first number is a positive, the parabola opens up, when the first number is a negative, the parabola opens down. in this case, the number is positive, so up is the answer
Step-by-step explanation:
Answer:
21x4 + 8x3 - 40x2 + 15
Step-by-step explanation:
expand using distributive property.
Let x=Don's present age
2x=Chris's present age
next year:
<span>x+1=Don's age
</span><span><span>2x+1=Chris's age
(x+1)+((2x+1)=4(x-1) (next year the sum of their ages will be four times as much as Don's age last year.)
x+1+2x+1=4x-4
x=6
2x=12
Don's present age=6
Chris's present age=12 </span><span>
</span></span>
Answer:
40
Step-by-step explanation:
That is rounded
Answer:
Im gonna go with A
Step-by-step explanation: