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2 years ago

Find two numbers whose product is -2, and whose sum is -1.

Mathematics

1 answer:

PIT_PIT [208]2 years ago

8 0

Answer:

$x=-2 \ \ \ and \ \ \ y=1$

Step-by-step explanation:

Suppose numbers are x and y

Product of x and y is -2

$xy=-2$

And sum of x and y is -1

$x+y=-1$

$x=-2 \ \ \ and \ \ \ y=1$

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A bag contains 7 red marbles, 3 blue marbles and 5 green marbles. If three marbles

worty [1.4K]

Answer:

3.7%

Step-by-step explanation:

We know that from this situation, the probability of drawing a single green marble is 1/3. However, to find the probability of drawing 3 green marbles, we will need to do:

$P= \frac{1}{3}* \frac{1}{3}*\frac{1}{3}$

We get a probability of:

$P= \frac{1}{27}$

This converts to a percentage of:

$\frac{1}{27}= 0.037 \\ 0.037*100= 3.7%$

We get a percentage of 3.7%

8 0

2 years ago

Find the center and radius of the circle (x+3)^2+(y-1)^2=81

sasho [114]

The equation of a circle is written as ( x-h)^2 + (y-k)^2 = r^2

h and k is the center point of the circle and r is the radius.

In the given equation (x+3)^2 + (y-1)^2 = 81

h = -3

k = 1

r^2 = 81

Take the square root of both sides:

r = 9

The center is (-3,1) and the radius is 9

5 0

3 years ago

A _____ is accepted to be true without proof, while a _____ is an assertion that can be proven using the rules of logic.A.theore

Luba_88 [7]

Answer:

C. postulate; theorem

Step-by-step explanation:

While a "given" is taken as true without proof, and a "problem" sometimes involves an assertion that can be proven, the answer choices involving these terms are not correct here.

The dictionary definitions of "postulate" and "theorem" apply. It is useful to learn the meaning of these terms so you can understand problems and descriptions that use them.

3 0

3 years ago

I need it done asapp Will give brainly!!

brilliants [131]

Answer:

Step-by-step explanation:

4(5-2)+(-7)(0.5)

20-8+(-3.5)

12-3.5

8.5

6 0

3 years ago