A bag contains 10 red marbles, 15 yellow marbles and 5 green marbles. What is the probability of drawing a red or green marble from the bag?

Answers

Answer 1

Answer: Probability =

(number of ways it can come out the way you want)
divided by
(total number of ways it can come out).

Total number of ways to draw a marble = 30 (marbles in the bag).

Number of ways it can succeed = 15 (number of red or green ones)

Probability = 15/30 = 1/2 = 50% .

Answer 2

Answer: 10(red) plus 5(green) equals 15. red plus green plus yellow equals 30 15/30 - 50%

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At the start of the day there was £129.75 in the till. One hour later there is £145.50. How much money did the shop make in an hour?
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On the graph of the equation 5x – 2y = 20, what is the value of the y-intercept?
When i was two, my brother was half my age now i am 100. what is my brothers age
Circle R has a radius of 6, and is tangent to circle R at point Q. Also, QP = 8. (a) What is the measure of angle RQP Explain your answer. b) What is the length of RP Explain your answer. (c) What is the length of RS Explain your answer. (d) What is the length of RP Explain your answer.

write an expression that shows how you can multiply 9*475 using expanded form and the distributive property

Answers

475 = 400 + 70 + 5

therefore

9 × 475 = 9 × (400 +70 + 5) = 9 × 400 + 9 × 70 + 9 × 5
=3600 + 630 + 45 = 4275

I think... It's better to use Distributive Property:
(a - b) × c = a × c - b × c

9 = 10 - 1

therefore:
(10 - 1) ×475 = 10 × 475 - 1 × 475 = 4750 - 475 = 4275

HELPP!!
Select the correct answer.
What is the value of arcsin ?

Answers

For this case we have that by definition, it is called arcsine (arcsin) from a number to the angle that has that number as its sine.

We must find the $arcsin (\frac {\sqrt {2}} {2})$ . Then, we look for the angle whose sine is $\frac {\sqrt {2}} {2}$ .

We have to, by definition:

$Sin (45) = \frac {\sqrt {2}} {2}$

So, we have to:

$arcsin (\frac {\sqrt {2}} {2}) = 45$

Answer:

Option B

Answer:

Choice B

Step-by-step explanation:

An option is to find the the square root of 2 in decimals is $(1.414213562)/(2) ≈ <strong>0.7071067812</strong>$

Now we can use the arc sine, which is the inverse of a sin.

To do this we must use a scientific calculator. By pressing the arc sin button and entering in 0.7071067812, we can find the arc sin, which is 45°.

If a plant manufacturing carpet backing has a cylindrical tank that is 3 meters high and is 6 meters in diameter. What is the volume of the tank? Assume that 3.14 is the value for pi.

Answers

h = 3 m, d = 6 m , so: r = 3 m;
The volume of the tank is:
V = r² π h = 3² · 3.14 · 3 = 9 · 3.14 · 3 = 27 · 3.14 = 84.78 m³

Answer:

The volume of the tank is $84.78\ m^(3)$

Step-by-step explanation:

we know that

The volume of a cylinder is equal to

$V=\pi r^(2)h$

In this problem we have

$r=6/2=3\ m$ -----> the radius is half the diameter

$h=3\ m$

substitute

$V=(3.14)(3^(2))(3)=84.78\ m^(3)$

Are all spheres similar?

Answers

yes is the correct answer
all are similar

If they are all true spheres then yes

F is between C and B. If CF = 7x+4, FB = 10x -69, and CB = 12x -25. Find x and CF

Answers

Answer:

x = 8
CF = 60

Step-by-step explanation:

CF + FB = CB

(7x+4) +(10x-69) = (12x-25)

5x = 40 . . . . . . . . add 65-12x

x = 8 . . . . . . . . . . divide by 5

CF = 7x +4 = 7(8) +4 . . . . use the x value in the expression for CF

CF = 60

Henri bought 3 jars of spaghetti sauce. He used a coupon that reduced the cost of each jar by $0.75. If he paid $6.72 altogether, what was the regular price?

Answers

Answer: $8.97

Step-by-step explanation:

he bought three jars and lowered the price by 75 cents for each, so multiply $0.75 by three

$0.75 * 3 = $2.25

so henri saved $2.25 in total

we can add that to what he paid to find the original cost

$6.72 + $2.25 = $8.97

so the original price was $8.97 :)

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