Standard form of a circle" (x-h)²+(y-k)²=r², (h,k) being the center, r being the radius.
in this case, h=-2, k=6, (x+2)²+(y-6)²=r²
use the point (-2,10) to find r: (-2+2)²+(10-6)²=r², r=4
so the equation of the circle is: (x+2)²+(y-6)²=4²

6 0

3 years ago

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If q→ p is true, then ~ p → ~ q is _____ true. always sometimes never

Bogdan [553]

Answer: always

Step-by-step explanation:

6 0

3 years ago

If a drug has a concentration of 8.22 mg per 3.039 mL, how many mL are needed to give 7.469 gram of the drug? Round to 1 decimal

aalyn [17]

Answer:

2.8 litres

Step-by-step explanation:

8.22 mg per 3.039 mL

2.704 mg per 1 mL

7.469 gram = 7469 milligrams

7469 milligrams per 2,761.34927mL

= 2.761 litres = 2.8 litres

7 0

3 years ago

Lindsay went to the teacher supply store she bought 10 whiteboards for a total of $35 and some posters for $5.40 each. If she sp

Paul [167]

The whiteboards she bought cost $35, and she spent a total of $51.20, subtract to find out the total amount she spent on posters:

$\sf 51.20-35=16.2$

So she spent a total of $16.20 on posters, now divide by the amount one poster costs to find out how many posters she bought.

$\sf 16.2\div 5.4=\boxed{\sf 3}$

So she bought 3 posters.

4 0

3 years ago

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