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3 years ago

What is the center of the circle (x + 2)2 + (y - 5)2 = 2.25?

1 answer:

3 0

This equation of the circle is in a center-radius form which is more generally written as,
(x - h)² + (y - k)² = r²
From the equation, the center of the circle is (h,k) and r is the radius. From the given equation above, the center of the circle is (-2,5).

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Hi I really need help with this question please,

Mrrafil [7]

Answer:

${ ( \sqrt{30 - x} )}^{2} = {x}^{2} \\ 30 - x = {x}^{2} \\ \\ {x}^{2} + x - 30 = 0 \\ delta = 1 - 4 \times ( - 30) \times 1 = 121 \\ x1 = \frac{ - 1 + \sqrt{121} }{2 \times 1} = \frac{ - 1 + 11}{2} = 5 \\ x2 = \frac{ - 1 - \sqrt{121} }{2 \times 1} = \frac{ - 1 - 11}{2} = - 6 \\$

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2 years ago

if the probability of picking a green marble from a bag of green and red marbles is 0.3. if i choose a marble 100 times and repl

vfiekz [6]

Answer:

30 marbles would be green

Step-by-step explanation:

green chance is 0.3

red chance 0.7

.3 times 100

30 green marbles is what you would expect

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3 years ago

Andre notices that he is a little taller than Lin but is shorter than their math teacher, who is 164 centimeters tall. Write two

Ugo [173]

Answer:

Andre's height: y < x < 164

Step-by-step explanation:

We will first of all convert each of the statements to mathematical inequalities, before we combine them.

Let Andre's height be = x

Lin's height be = y

The maths teacher's height = 164

Andre is a little taller than Lin:

x > y

Andre is shorter than their maths teacher, who is 164 centimetres

x<164

Combining the two inequalities, we have Andre's height as

y < x < 164

This means that Lin is shorter than Andre who is in turn shorter than the Maths Teacher.

3 0

4 years ago

Someone please help me answer this!!

suter [353]

Answer:

4 1/10

Step-by-step explanation:

4.1

= 4 + 1/10

= 4 1/10

Hope you understand!

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3 years ago

A mean average of 70 or better on five exams is needed for a final grade of C. Jeffery Matthews first four exam grades are 75, 6

erastova [34]

Answer:38

Step-by-step explanation:

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3 years ago