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4 years ago

Use the distributive property to multiply -7 (2x - 4) I think it's -14x + 28

Mathematics

2 answers:

SashulF [63]4 years ago

5 0

-14x+28 is correct. Good job!

timofeeve [1]4 years ago

4 0

It is-14x + 28 way to go!

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A pair of dice is rolled, and the sum of the numbers is either 7 or 11. What is the probability of this event?

AfilCa [17]

Answer: $\dfrac{2}{9}$

Step-by-step explanation:

Let A be the event that the sum is 7 and and B be the event that the sum is 11 .

When two pair of dices rolled the total number of outcomes = $n(S)=6\times6=36$

The sample space of event A ={(1,6), (6,1), (5,2), (2,5), (4,3), (3,4)}

Thus n(A)= 6

The sample space of event B = {(5,6), (6,5)}

n(B)=2

Since , both the events are independent , then the required probability is given by :-

$P(A\cup B)=P(A)+P(B)\\\\=\dfrac{n(A)}{n(S)}+\dfrac{n(B)}{n(S)}=\dfrac{6}{36}+\dfrac{2}{36}=\dfrac{8}{36}=\dfrac{2}{9}$

Hence, the required probability = $\dfrac{2}{9}$

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3 years ago

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3 years ago

Keith is the owner of a cafe. He bought 28.6 pounds of apples for making pies. Apples cost$1.75 per pound. He also bought a can

Blizzard [7]

Answer:

$77.514

Step-by-step explanation:

28.6 x 1.74 + 27.75 = 77.514

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2 years ago

What is 1/5 + 2/3 help

Vesnalui [34]

You need to simplify so one-fifth would be 3/15 and 2/3 would be 10/15 so you need to add that together and it would be 13/15

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4 years ago

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irina1246 [14]

This is a simple subtraction question,
y is a variable, so Jaron could be any age and still be 5 years older than dawn.

lets say Jaron is 20, since he is five years older, we can subtract 5 from 20 and get 15

so
y = 20
d = 15

d = dawn's age

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4 years ago

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