WHY IS STEPHAN WRONG?? PLEASE EXPLAIN WHY AND THE CORRECT ANSWER. was meant to be done 2 months ago

Mathematics

2 answers:

Shtirlitz [24]3 years ago

4 0

Answer:

Step-by-step explanation:

xxTIMURxx [149]3 years ago

4 0

He is wrong because he chose his answer as if the graph were going by 1’s. The graph is going by 2’s for each point. I want to say the answer is h=4d because the point is on 4.

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Will mark brainly :)

WARRIOR [948]

Answer:

If is positive, then the parabola opens upward, so the function decreases on and increases on . But if is negative, then just the reverse

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2 years ago

To run 12 miles, how many times must you run around a park that is 2 miles long and 1 mile wide?

Veronika [31]

Pretty sure it’s 6 miles

8 0

2 years ago

When two computers are working together, they can finish updating software in 9 minutes. How long would they take individually t

tensa zangetsu [6.8K]

First computer takes x min. For 1 min it does 1/x part of work.

Second computer takes (x+24) min. For one min it does 1/(x+24) part of work.

Both computers for one min do (1/x+1/(x+24)) part of work.

At the same time, both computers for one min do 1/9 part of work.

$\frac{1}{x} + \frac{1}{x+24} = \frac{1}{9} 
\\ \\ \frac{x+24+x}{x(x+24)} = \frac{1}{9} 
\\ \\9(2x+24)=x^{2} +24x
\\ \\ 18x+216=x^{2} +24x
\\ \\ x^{2}+6x-216=0
\\ \\ D=b^{2}-4ac=36+4*216 = 900
\\ \\ x= \frac{-b+/- \sqrt{D} }{2a} = \frac{-6+/-30}{2} 
\\ \\ x_{1}=-18, x_{2}=12

We can use only positive number here. So, 

for the first computer x=12 min,

 for second computer x+24=12+24= 36 min

Answer 12 min and 36 min.$

7 0

3 years ago

Help please me please help me

Vinil7 [7]

Answer: (3, 18)

Step-by-step explanation: Where the lines corss the x does not go over 10 so the only other option is a 3. If you cut the box hori in half in you mind, the top half being 15-20 and the bottom half bring 10-14, then you can see the lines cross on the top half. Meaning it’s at 18 not 12.

3 0

3 years ago

Can some one help me please fast

frez [133]

10.
1/2 and 3/5 have the denominators 2 and 5. The smallest number that both 2 and 5 can go into is 10.

4 0

3 years ago

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