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3 years ago

What is 3+7x-(2+9x)

Mathematics

2 answers:

geniusboy [140]3 years ago

5 0

3 + 7x -(2 + 9x)

3 + 7x - 2 - 9x

3 - 2 + 7x - 9x

1 + 7x - 9x

1 - 2x

natali 33 [55]3 years ago

5 0

3+7x-(2+9x)=x

We simplify the equation to the form, which is simple to understand

3+7x-(2+9x)=x

Remove unnecessary parentheses

3+7x-2-9x=x

We move all terms containing x to the left and all other terms to the right.

+7x-9x-1x=-3+2

We simplify left and right side of the equation.

-3x=-1

We divide both sides of the equation by -3 to get x.

x=0.33333333333333

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2p + 194.99 = 284.97

Lostsunrise [7]

Answer: true

Step-by-step explanation:

3 0

3 years ago

Read 2 more answers

Whatis 4b to the -6 power in its simplest form

Olenka [21]

4b^-6

When u have a negative exponent, u simply take the reciprocal. So the answer is

4/b^6

6 0

4 years ago

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Solve the equation. Then check your solution. 5/9d = 9/10

sdas [7]

Answer:

$d=1.62$

The equation is TRUE.

Step-by-step explanation:

To solve the given equation:

$\frac{5}{9}d=\frac{9}{10}$

You need to find the value of the variable "d". You can apply this procedure:

- Multiply both sides of the equation by 9:

$(9)(\frac{5}{9}d)=(\frac{9}{10})(9)\\\\5d=\frac{81}{10}\\\\5d=8.1$

- Divide both sides of the equation by 5:

$\frac{5d}{5}=\frac{8.1}{5}\\\\d=1.62$

Check the solution substituting the value of "d" into the equation and evaluating:

$\frac{5}{9}(1.62)=\frac{9}{10}\\\\0.9=0.9\ (TRUE)$

3 0

3 years ago

A friend of mine is giving a dinner party. His current wine supply includes 9 bottles of zinfandel, 10 of merlot, and 12 of cabe

e-lub [12.9K]

Answer:

Step-by-step explanation:

From the given information:

The total number of wine = 9 + 10 + 12 = 31

(1)

The number of distinct sequences used for serving any five wines can be estimated by using the permutation of the number of total wines with the number of wines served.

i.e

= $^{31}P_5$

$=\dfrac{31!}{(31-5)!}$

$=\dfrac{31!}{(26)!}$

$=\dfrac{31\times 30\times 29\times 28\times 27\times 26!}{(26)!}$

= 20389320

(2)

If the first two wines served = zinfandel and the last three is either merlot or cabernet;

Then, the no of ways we can achieve this is:

= $^9P_2\times ^{22}P_3$

$= \dfrac{9!}{(9-2)!}\times \dfrac{22!}{(22-3)!}$

$= \dfrac{9!}{(7)!}\times \dfrac{22!}{(19)!}$

$= \dfrac{9*8*7!}{(7)!}\times \dfrac{22*21*20*19!}{(19)!}$

= 665280

(3)

The probability that no zinfandel is served is computed as follows:

Total wines (with zinfandel exclusion) = 31 - 9 = 22

Now;

the required probability is:

$= \dfrac{^{22}P_5 }{^{31}P_5}$

$= \dfrac{\dfrac{22!}{(22-5)!} } {\dfrac{31!}{(31-5)!} }$

$= \dfrac{\dfrac{22!}{17!} } {\dfrac{31!}{(26)! }}$

$= \dfrac{(\dfrac{22*21*20*19*18*17!}{17!})} {(\dfrac{31*30*29*28*27*26!}{(26)! })}$

= 0.1549

≅ 0.155

4 0

3 years ago

a system of equations is shown below: equation a: 2c = d − 8 equation b: c = 3d 8 which of the following steps should be perform

Fofino [41]

If you would like to know which of the following steps should be performed to eliminate variable d first, you can find this using the following steps:

equation a: 2c = d - 8 /*(-3)
equation b: c = 3d + 8
__________________
-6c = -3d + 24
c = 3d + 8
__________________
-6c + c = -3d + 24 + 3d + 8
-5c = 32
5c = -32
c = -32/5

The correct result would be: multiply equation a by −3.

3 0

4 years ago