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3 years ago

Which math expression represents the phrase? 8 times the difference of a number and 3

2 answers:

7 0

Lets say a number = n

8 times the difference of a number and 3 (the difference between two numbers mean you have to subtract them)

8 times (n - 3) (the reason why i put the parentheses is because you are supposed to subtract these 2 numbers first before any thing else)

8 * (n - 3)

The answer is A.

s2008m [1.1K]3 years ago

3 0

Letter A is the correct answer because you can obviously exit out c and d, but yo get a good phrase you might as well have some parentheses to make this work because without it, would be confusing :)

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Angelina needs 468 yards of ribbon to decorate quilts for a craft fair. The ribbon comes in rolls of 32 yards. How many rolls of

borishaifa [10]

Answer:

well you need to divide 468 by 32

6 0

2 years ago

Q4: Write the equation in slope-intercept form of the line that is perpendicular to

Rama09 [41]

Answer:

y= −1/2x+ 1/2

Step-by-step explanation:

Find the negative reciprocal of the slope of the original line and use the point-slope formula

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8 0

2 years ago

The ABC company's brand has a market share of 30%. Suppose that in a survey, 800 consumers of the product are asked which brand

Anna007 [38]

Answer: 0.68

Step-by-step explanation:

given data:

ABC market share = 30%

number of customers surveyed = 800

probability that more than 32% prefers ABC

Solution:

32% of 800

= 256 persons

p ( x ≥ 256 )

= 1 - ( 256/800 )

= 1 - 0.32

= 0.68

the probabiliy that more than 32% of those who carried out the survey would prefer ABC brand is 0.68.

5 0

2 years ago

An urn contains two black balls and three red balls. If two different balls are successively removed, what is the probability th

lidiya [134]

You can extract two balls of the same colour in two different way: either you pick two black balls or two red balls. Let's write the probabilities of each pick in each case.

Case 1: two black balls

The probability of picking the first black ball is 2/5, because there are two black balls, and 5 balls in total in the urn.

The probability of picking the second black ball is 1/4, because there is one black ball remaining in the urn, and 4 balls in total (we just picked the other black one!)

So, the probability of picking two black balls is

$P(\text{two blacks}) = \dfrac{2}{5} \cdot \dfrac{1}{4} = \dfrac{2}{20} = \dfrac{1}{10}$

Case 2: two red balls

The probability of picking the first black ball is 3/5, because there are three red balls, and 5 balls in total in the urn.

The probability of picking the second red ball is 2/4=1/2, because there are two red balls remaining in the urn, and 4 balls in total (we just picked the other red one!)

So, the probability of picking two red balls is

$P(\text{two reds}) = \dfrac{3}{5} \cdot \dfrac{1}{2} = \dfrac{3}{10}$