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3 years ago

3xy−5y for x=−1.5 and y=−3

2 answers:

3 0

Plug in 1.5 for x, to start off. It is then simplified to : 3*(1.5)* y - 5y
Then plug in -3 for y, it's then simplified to : 3*(1.5)* -3 - 5 * (-3)
First, multiply 1.5 times 3, and that will get you 4.5. The multiply 4.5 with -3, and that will get you -13.5. Moving on, subtract -13.5 from the 5 that is being multiplied to -3, which is -15. In conclusion, -13.5 subtracted from -15 would be -28.5. Hope this helps!

Neko [114]3 years ago

3 0

Answer:

28.5

Step-by-step explanation:

whoever said -28.5 your wrong i just put it i nRSm and it said incorrect. but when i put in 28.5 it said correct

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The volume of a gas varies directly with its temperature and inversely with the pressure. If the volume of a certain gas is 15 c

vladimir2022 [97]

Answer:

Therefore the volume of the gas is 32 cubic feet.

Step-by-step explanation:

Given that,

The volume of a gas varies directly with its temperature and inversely with the pressure.

$V\propto \frac{T}{P}$

V= Volume of the gas at constant mass

T= Temperature at constant mass

P= pressure at constant mass

$\frac{V_1}{V_2}=\frac{\frac{T_1}{T_2}}{\frac{P_1}{P_2}}$

$\therefore \frac{V_1}{V_2}=\frac{T_1P_2}{T_2P_1}$ .

Given that,

At constant mass, the volume of a certain gas is 15 cubic feet and a pressure of 40 pound per square inch at a temperature 300 k.

$V_1$ =15 cubic feet, $P_1$ =40 pound per square inch and $T_1$ = 300 K

$V_2=?$ , $P_2$ =20 pound per square inch and $T_2$ = 320k

$\therefore \frac{V_1}{V_2}=\frac{T_1P_2}{T_2P_1}$ .

Plugging all values

$\frac{15}{V_2}=\frac{300\times 20}{320\times 40}$

$\Rightarrow V_2=\frac{15\times 320\times 40}{300\times 20}{}$

$\Rightarrow V_2=32$ cubic feet

Therefore the volume of the gas is 32 cubic feet.

4 0

3 years ago

the first 3 numbers in a sequence are 30000, 12000, and 4800. Use a percent to describe the pattern of the sequence. List the ne

Naddik [55]

From 30000 to 12000 is 2.5 from 12000 to 4800 is 2.5 so using 2.5 you divide 2.5 from 4800= 1920 1920/2.5= 768
the anwers for the sequence are 1920 and 768
the percentage is .025%

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4 years ago

Simplify (9y²-x² )÷ (xy+3y²)

alexdok [17]

Step-by-step explanation: