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3 years ago

SIMPLIFY THE EXPRESSION. 9(1 - 7x)

Mathematics

2 answers:

solmaris [256]3 years ago

8 0

Answer:

9 - 63x

Step-by-step explanation:

Apply the distributed property:

9 × 1 = 9
9 × 7x = 63x
Put them together: 9 - 63x

I hope this helps!

jok3333 [9.3K]3 years ago

7 0

Answer:

9-63x

Step-by-step explanation:

9(1-7x)

9-63x

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"the sum of the digits of a two-digit number is 12. The difference of the digits is 2. find the number if the units digit is lar

Stells [14]

let the number be xy then

x + y = 12

y - x = 2 ( because y > x)

adding we get 2y = 14 so y = 7

and x = 12 - 7 = 5

So the number is 57.

7 0

3 years ago

What is 12x34(234)+123x234

QveST [7]

Answer:

it's 124,254

Step-by-step explanation:

34 x 234 = 7,956

12 x 7956 = 95,472

123 x 234 = 28,782

95,472 + 28,782 = 124,254

hope that helps...

6 0

2 years ago

Read 2 more answers

HELP NOW!!! 20 POINTS AND URGENTLY NEEDED!!!!!!!!!!!!!!

Lunna [17]

So basically here is the answer mate!

2x + 7y = 3-------------------------(substitute x's value here, i.e., x = -4y)

2( -4y ) + 7y = 3

-8y + 7y = 3

-1y = 3

y = -3------------------------( 1 )

Since x = -4y

= -4 ( -3 ) --------------------------( since we found the value of y)

= 12

Here is the answer for x = 12 , y = -3

Mark my anwer as the brainliest please ! :)

4 0

2 years ago

And this is the last one i need done

quester [9]

Answer:

x=-2.5,9

Step-by-step explanation:

Set them equal to each other to say 2x^2-9x=4x+45. Get them all on one side to get 2x^2-13x-45. Factor that out to get (x+2.5)(x-9). Set that equal to 0 to get x=-2.5,9

5 0

3 years ago

A new test has been developed to detect a particular type of cancer. The test must be evaluated before it is put into use. A med

Troyanec [42]

The tree diagram of the problem above is attached
There are four outcomes of the two events,

First test - Cancer, Second Test - Cancer, the probability is 0.0396
First test - Cancer, Second Test - No Cancer, the probability is 0.0004
First test - No Cancer, Second Test - There is cancer, the probability is 0.0096
First test - No cancer, Second Test - No cancer, the probability is 0.9054

The probability of someone picked at random has cancer given that test result indicates cancer is $\frac{0.0396}{0.0396+0.0096}= \frac{33}{41}$

The probability of someone picked at random has cancer given that test result indicates no cancer is $\frac{0.0396}{0.0004+0.9504} = \frac{99}{2377}$

7 0

3 years ago