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2 years ago

What is the midpoint of (-3, 4) and (-6, -1)

Mathematics

1 answer:

pishuonlain [190]2 years ago

6 0

Do the steps of x and y. And see where they hit each other

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An opaque bag contains 5 green marbles 3 blue marbles and 2 red marbles. What is the probability of randomly picking out a marbl

anastassius [24]

Answer= .2 probability

Explanation: Since there is a total of 10 marbles, and 2 are red, you would divide the red marbles (2) out of the total marbles (10) which would get u .2. Since it’s asking for probability, we would keep .2 a decimal.

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2 years ago

Someone lent me a book and they told me they left something inside and the picture attached shows the note that they left for me

son4ous [18]

Answer:

'∂' -- means a partial differential

'Δ' -- means a change in some variable.

'σ' --means 'sum' and 'deviation'.

The text says something about the world turning so maybe the equation has something to do with that? Maybe it is the equation for the earth's rotation. Sorry I can't find anything else, but I hope this helps a bit!

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2 years ago

Write an equation of the circle with center (-7, 4) and radius 8.

Stels [109]

answer

(x+7)^2 + (y-4)^2 = 64

set up equation

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

where h is the center x coordinate and k is the center y coordinate

values

from the point (-7,4) we know that h = -7 and k = 4

since the radius is 8, r^2 = 8^2 = 64

plug in values

now that we have all the values, we plug them into (x - h)^2 + (y - k)^2 = r^2

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

(x - (-7))^2 + (y-4)^2 = 64

(x+7)^2 + (y-4)^2 = 64

7 0

3 years ago

How many combinations with repetition are allowed if n = 5 and r = 3?<br> 120<br> 125<br> 10<br> 35

Aneli [31]

10 possible combinations

5 0

2 years ago

Read 2 more answers

In a pile of 55 coins made of nickels and dimes totaling $3.90 how many of each coin are there

tigry1 [53]

There are 5 pennies in a nickel, and 10 pennies in a dime. Now in $3.90 there are 390 pennies.

n = number of nickels in the pile

d = number of dimes in the pile

we know the pile has 55 coins, therefore whatever "n" and "d" are, we know that n + d = 55.

now, "n" is how many nickel coins are there, how many pennies is it in total? well, 5 pennies to a nickel, for "n" nickels, will then be 5(n) or 5n.

and "d" is how many dime coins are there, so therefore in "d" coins, there are 10(d) pennies, or 10d.

we also know the total amount of pennies is 390, therefore 5n + 10d = 390.

$\bf \begin{cases}
n+d=55\implies \boxed{n}=55-d\\
5n+10d=390\\
-------------\\
5\left(\boxed{55-d} \right)+10d=390
\end{cases}
\\\\\\
275-5d+10d=390\implies 5d=115\implies d=\cfrac{115}{5}\implies d=23$

how many nickel coins are there anyway? well, n = 55 - d.

8 0

2 years ago