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2 years ago

15

How to be best in math?

1 answer:

djyliett [7]2 years ago

6 0

You must practice maths every day. Practice more and more sums which you have find difficulties.
Means you have to practice, practice and practice.
Practice makes a man perfect.

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Find the center and radius of the circle with the equation. Please show work!

mina [271]

Answer:

<h2>(1, -2)</h2>

Step-by-step explanation:

The equation of a circle:

$(x-h)^2+(y-k)^2=r^2$

(h, k) - center

r - radius

We have:

$x^2-2x+y^2+4y=4\qquad\text{add}\ 1^2\ \text{and}\ 2^2\ \text{to both sides}\\\\x^2-2x+1^2+y^2-2(-2)(y)+2^2=2(1^2)(2^2)\qquad\text{use}\ (a\pm b)^2=a^2\pm2ab+b^2\\\\(x-1)^2+(y-(-2))^2=8\\\\h=1,\ k=-2\to(1,\ -2)$

3 0

2 years ago

Write three numbers grater than 20 that have 9 as a factor

Burka [1]

27, 36, 45 are greater than 20 and multiples of 9.

5 0

3 years ago

How many Japanese yen are equal to $100?

disa [49]

If you mean american dollars (which you most likely do) then it would be:
100 = 12285.
1000 = 122850.
10.000 = 1228.10
hope i helped

3 0

2 years ago

Read 2 more answers

If 40% of the total population of a particular town of 2500 are HIV positive. How many people are HIV negative.

katovenus [111]

Answer:

1500 people

Step-by-step explanation:

Since 40% are HIV positive (that's a lot of people), 60% will be HIV negative. All you have to do is find 60% of 2500.

60% of 2500 = 0.6 * 2500 = 6 * 250 = 1500

Hope this helps!

5 0

2 years ago

Which of the following equations have no solution? Select all that apply.

lana [24]

The answer should be B and A

3 0

3 years ago

Read 2 more answers