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lyudmila [28]
3 years ago
14

7y-23 plus 23x-16 plus 8x -21 find x and Y show steps please

Mathematics
1 answer:
Solnce55 [7]3 years ago
6 0
7y - 23 + 23x -16 + 8x - 21  
31x + 7y - 60  
What is the original problem equal to? You can't go any further unless you know.
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A bag contains 9 marbles: 3 are green, 2 are red, and 4 are blue. Bob chooses a marble at random, and without putting it back, c
kvasek [131]

Answer: 1/18

Step-by-step explanation:

9 total marbles

2 red

so the first time he picks it would be a 2/9 chance of the marble being red

the second time there would be 8 total marbles and 2 red, so it would be a 2/8 or 1/4 chance.

the probability is found by doing 2/9*1/4 which equals 2/36 or 1/18.

8 0
2 years ago
If Kamila can do a job in 26 hours and Simon and Kamila working together can do the same job in 9 hours , find how long it takes
Kay [80]

Answer:

Simon takes approximately 13.76 hours to complete the job alone.

Step-by-step explanation:

We are given the following in the question:

Kamila can do a job in 26 hours  

So, part of work done by Kamila in 1 hour =

\dfrac{1}{26}

Simon and Kamila working together can do the same job in 9 hours .

So, (Simon and Kamila)'s 1 hour work =

\dfrac{1}{9}

So, Simon's 1 hour work =

\dfrac{1}{9}-\dfrac{1}{26}=\dfrac{17}{234}

So,

Simon can do \frac{17}{234} part of work in hour = 1

Time taken by Simon to complete the job alone =

\dfrac{1}{\frac{17}{234}}=\dfrac{234}{17}\approx 13.76 \text{ hours}

Thus, Simon takes approximately 13.76 hours to complete the job alone.

3 0
3 years ago
(2t^(3)+3t-4)-(4t^(2)-6t)
Gnoma [55]

2

3

−

4

2

+

9

−

4

Step-by-step explanation:

3 0
3 years ago
What is 4 wholes and 2 3rds divided my 1 whole and w ninths
ira [324]

Answer:

Step-by-step explanation:

7 0
3 years ago
HELP MATH WHIZZES!! TON OF FREE POINTS, EASY GEOMETRY QUESTION FOR THE RIGHT ANSWER! WHO WILL WIN THIS?! NEED HELP, NOT WRONG AN
Radda [10]
The area of the trapezoid is the product of the height and the average of the two bases: 
<span>30 (25 + 33)/2 = 30 (58)/2 = 30 (29) = 870 square yd. </span>

<span>But we want to exclude the area of the fountain. </span>
<span>Since it's circular its area is π times the square of its radius, or 16π square yd. </span>

<span>So the area of the park, excluding the fountain, is </span>
<span>870 - 16π square yd, </span>
<span>or about 820 square yd.</span>
5 0
3 years ago
Read 2 more answers
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