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2 years ago

Help with 9 and 10 please?

Mathematics

1 answer:

JulsSmile [24]2 years ago

3 0

9. Let x equal the number

Two less than a number is

x - 2

Is more than 15 is

> 15

Put them together for

x-2 > 15

Now solve

x-2 > 15
x > 17

10. Let x equal a number

Seven more than a number is

x+ 7

Is less than or equal to 27 is

<= 27

Put them together for

x + 7 <= 27

Now solve

x+ 7 <= 27
x <= 20

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irga5000 [103]

He is wrong.
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So, the 10 inch cube should be twice as big in volume by a factor of 2*2*2
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2 years ago

. What are the exact solutions of x2 - x - 4 = 0?

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X ² - x - 4 = 0
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2 years ago

Read 2 more answers

you pick a card at random without getting the first card back you pick a second card at random what is the probability of pickin

Keith_Richards [23]

We have to calculate the probability of picking a 4 and then a 5 without replacement.

We can express this as the product of the probabilities of two events:

• The probability of picking a 4

• The probability of picking a 5, given that a 4 has been retired from the deck.

We have one card in the deck out of fouor cards that is a "4".

Then, the probability of picking a "4" will be:

$P(4)=\frac{1}{4}$

The probability of picking a "5" will be now equal to one card (the number of 5's in the deck) divided by the number of remaining cards (3 cards):

$P(5|4)=\frac{1}{3}$

We then calculate the probabilities of this two events happening in sequence as:

$\begin{gathered} P(4,5)=P(4)\cdot P(5|4) \\ P(4,5)=\frac{1}{4}\cdot\frac{1}{3}=\frac{1}{12} \end{gathered}$

Answer: 1/12

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7 months ago

The vertices of square WXYZ are W(-2, -1), X(-2,-5),Y(-6,-5), and Z(-6,-1) what is the perimeter and area of the square show you

labwork [276]

Line Segment WX=4
Line Segment XY=4
Line Segment YZ=4
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2 years ago