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3 years ago

Please help !!

Mathematics

2 answers:

xxMikexx [17]3 years ago

5 0

I hope this helps you

Lady_Fox [76]3 years ago

4 0

#1)h^2+4h
#2)k^2-9k
#3)9a^2+9
#4)6p^2-48
#5)-6c^2-15
#6)-8g^2-28
#7)x^2-x^+3x
#8)15m^4-5m^2-35
#9)-3n^2+6n-24
#10)-12x^2+24x-36

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A bag contain 5 red marbles,4 green marbles and 1 blue marble. A marble is chosen at random from the bag and not replaced; then

jarptica [38.1K]

Answer:

$\frac{2}{15}$

Step-by-step explanation:

GIVEN: A bag contain $5$ red marbles, $4$ green marbles and $1$ blue marble. A marble is chosen at random from the bag and not replaced, then a second marble is chose.

TO FIND: What is the probability both marbles are green.

SOLUTION:

Total marbles in bag $=10$

total number of green marbles $=4$

Probability that first marble will be green $P(A)=\frac{\text{total green marbles}}{\text{total marbles}}$

$=\frac{4}{10}=\frac{2}{5}$

Probability that second marble will be green $P(B)=\frac{\text{total green marble in bag}}{\text{total marble in bag}}$

$\frac{3}{9}=\frac{1}{3}$

As both events are disjoint

probability both marbles are green $=P(A)\times P(B)$

$=\frac{2}{5}\times\frac{1}{3}=\frac{2}{15}$

Hence the probability both marbles are green is $\frac{2}{15}$

8 0

3 years ago

Rory earned an 84% on his test. He answered 21 questions correctly. How many total questions were on the test? Round to the near

Free_Kalibri [48]

Answer:

25 questions

Step-by-step explanation:

84%*x = 21

-simplify-

0.84 *x = 21

Divide both sides by 0.84 than...

you get x = 25

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3 years ago

The radius of a circle is 3 feet. What is the circle's area?

Dafna1 [17]

Answer:

Step-by-step explanation:

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2 years ago

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Twenty times a square of a positive integer plus 50 equals negative 40 times the square of the positive integer plus one-hundred

rusak2 [61]

20x^2+50 = -40x^2+110x [ Taking x as the unknown positive integer ]

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3 years ago

What is -7n-4=24 lol i hate homework

Montano1993 [528]

It's a simple linear equation in 'n'. There's only one number that 'n' can be
that will make the equation a true statement. That number is called the
'solution' to the equation. Here's one way to find it:

You said that <u> -7n - 4 = 24</u>

Add 4 to each side:    -7n = 28

Multiply each side by -1 : 7n   = -28

Divide each side by 7 :    <em>n      = -4</em>

Homework is the only way for most people to learn stuff.

3 0

3 years ago

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