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3 years ago

Which variable expression matches the word phrase?

1 answer:

6 0

1. sum of 12 and quotient of 9 and a number
12 + (9 divided by y)

2. difference of 12 and product of 9 and a number
12 - (9 * y) or 12 - 9y

3. difference of 12 and quotient of 9 and a number
12 - (9 divided by y)

4. 12 more then the quotient of 9 and a number
12 + (9 divided by y)

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A single card is drawn from a standard 52-card deck. Let D be the event that the card drawn is a black card, and let F be the

Svetllana [295]

Answer:

$\dfrac{25}{26}$

Step-by-step explanation:

Let

D be the event that the card drawn is a black card
F be the event that the card drawn is a 10 card
F' be the event that the card drawn is not a 10 card

The probability

$Pr(D\cup F')=Pr(D)+Pr(F')-Pr(D\cap F')\\$

Note that

$Pr(D)=\dfrac{26}{52}=\dfrac{1}{2}\\ \\Pr(F)=\dfrac{4}{52}=\dfrac{1}{13}\\ \\Pr(F')=1-\dfrac{1}{13}=\dfrac{12}{13}\\ \\Pr(D\cap F')=\dfrac{24}{52}=\dfrac{6}{13}$

So,

$Pr(D\cup F')=\dfrac{1}{2}+\dfrac{12}{13}-\dfrac{6}{13}=\dfrac{25}{26}$

8 0

3 years ago

5+ 1/7b = -2<br>whats be and explanation<br>(don't get it cause its a fraction)

oee [108]

5+(1/7)b=-2

First subtract 5 from both sides. Our goal is to isolate b.
5+(1/7)b-5= -2-5
(1/7)b= -7

Now multiply both sides by 7 because (1/7)*7= 7/7 or 1.
7* (1/7)b= -7*7
1b= -49

Final answer: b= -49

8 0

3 years ago

2. How meny ways are there for 5 people to sit in a row?

tensa zangetsu [6.8K]

Answer:

the number of people as well as the number of chairs is 5.

Step-by-step explanation:

5! = 5x4x3x2x1= 120

so therefore, there are exactly 120 ways in which they can be seated.

7 0

3 years ago

The volume of a cube is 8 cubic meters. What is the length (in meters) of one edge of the cube?

notka56 [123]

Answer:

Step-by-step explanation:

volume=base•width•high

2•2•2=8

3 0

3 years ago

Help please important

Lemur [1.5K]

1) tan 41°= 30cm divide by y cm
y= 30 divide by tan-1 41°

3 0

3 years ago

Read 2 more answers