A cookie is chosen from a jar containing 4 choc chip, 3 pb, 2 oatmeal. What is the probability that you will choose a choc chip. Express your answer as a fraction in lowest form.

Answers

Answer 1

Answer: $|\Omega|=9\n |A|=4\n P(A)=(|A|)/(|\Omega|)=(4)/(9)$

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an artist transferred a rectangular design 13 cm long and 6 cm wide to a similar canvas 260cm long and 120 cm wide. what is the scale factor?????????

Answers

the scale factor is 20

Two glasses together contain 280 mLof water. The first glass contains 80 ml more than the second glass. How much water does the first glass contain?

Answers

x - 1st glass
y - 2nd glass

$x+y=280\n x=y+80\n\n y+80+y=280\n 2y=200\n y=100\hbox{ ml}\n\n x=100+80\n x=180\hbox{ ml}$

16 is 4% of what number?

Answers

16 is 4% of 400

Change the percentage into a decimal by dividing the decimal over 100:
$(4)/(100) = 0.04$

Divide 16 by the decimal (0.04):
$16 / 0.04 = 400$

A purse contains $2.45 in dimes andquarters. There are two more than
twice as many dimes as quarters. How
many of each coin are in the purse?

Answers

Answer:

dimes = 12, quarters =5

Step-by-step explanation:

Let x stand for quarters. So if there are two more than twice as many dimes than quarters than it would look something like

d = 2x+2

q = x

Now multiply them by the value of the coin, to get them into cents. So you'd multiply dimes by twn (2x+2*10) which is equal to 20x+20. Multiply quarters by 25. x*25=25x

Now make an equation. 20x+20+25x=245

45x=225

x=5

q = 5

d = 12

Why is it easy to calculate 5% of a number ? Give an Example

Answers

5% of 1000 is 5 * 1000 / 100 = 5000 / 100 = 50.

A store owner bought a jacket for $20. She sold it in her store for $35. What is the percent of the markup on the jacket?

Answers

If a store owner bought a jacket for $20 and sold it for $25 the markup would be 40%

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