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Marianna [84]
3 years ago
8

20 POINTS FOR ANSWER!!!

Mathematics
1 answer:
kiruha [24]3 years ago
3 0
P varies directly with Q and inversely with R, on the contrary, P varies inversely with R, this means P and R are indirectly proportional. In simple terms it means whatever you do to P, you do the opposite to R. O<span>r P=K*Q/R

</span>18=k*5/2 
<span>18=5k/2 </span>
<span>5k=36 </span>
<span>k=36/5 
</span>
P=K*Q/R 
<span>p=(36/5)(20/10) </span>
<span>p=72/5 </span>
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What is the value of the expression?
Blababa [14]

Answer:

- \frac{9}{10}

Step-by-step explanation:

Step 1: Add the numerator fractions.

2/5 + 3/10

Here we have to find LCD, the LCD of 5 and 10 is 10

                                         (2*2) + 3         4 + 3

Therefore,  2/5 + 3/10 = ---------------  = ------------------

                                          10                     10

= 7/10

Step 2: Now substitute 2/5 + 3/10 = 7/10 in the given fraction, we get


 7/10

=  ----------

     -7/9

If we have fraction over fraction, we have to find the reciprocal of denominator fraction and multiply.

The reciprocal of -7/9 is -9/7

Step 3: Now multiply 13/10 and -9/7

= (7/10) x (-9/7)

= -9/10

=-9/10

The answer is  -\frac{9}{10}

8 0
2 years ago
Read 2 more answers
The value of y varies inversely as the cube of x and y=1 when x=6. Find the value of y when x =2.
ch4aika [34]

Answer:

y=27 when x=2

Step-by-step explanation:

y varies inversely as the cube of x

y=k(1/X^3)

y=1 when x=6

y=k(1/X^3)

1=k(1/6^3)

1=k(1/216)

k=1÷1/216

K=1×216/1

k=216

find y when x=2

y=k(1/X^3)

y=216(1/2^3)

y=216(1/8)

y=216/8

y=27

3 0
3 years ago
Ami and Bert are drawing plans for rectangular vegetable gardens. In Ami's plan, the garden is 16 feet by 13 feet. In Bert's pla
Nesterboy [21]

Answer:

A and B

16 times 13=208

18 times 18=324

Subtract those and you get 116

4 0
2 years ago
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Ms.wilcox bought a sofa and a chair during the sale. The regular price of the sofa was $875 and the regular price of the chair w
coldgirl [10]

Answer:

Step-by-step explanation:

474$

7 0
3 years ago
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Simplify the following polynomial expression​
Juli2301 [7.4K]

Distribute the negative sign

7x^2-3x-6

Combine like terms

-9x^2 + 7x^2 = -2x^2

9x - 3x = 6x

13 - 6 = 7

-2x^2 +6x + 7

<u>Answer</u>

-2x^2 +6x + 7

3 0
3 years ago
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