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3 years ago

Can you help me 2x+3y-x-(8+1)?

Mathematics

2 answers:

professor190 [17]3 years ago

8 0

Answer: x+3y−9

Step-by-step explanation:

Simplify the expression.

I'd appreciate brainliest I need one more to get expert

xxTIMURxx [149]3 years ago

5 0

Answer: x+3y-9

Exclamation:hhh

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Find the vertices and foci of the hyperbola with equation quantity x plus 1 squared divided by 225 minus the quantity of y plus

miss Akunina [59]

Answer:

The vertices are (-16,-5) and (14,-5)

The foci are (-26,-5) and (24,-5)

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3 years ago

chuck earned $76 mowing lawns.the gas for the mower cost $12 and he bought a new string for the trimmer for $7.write and find th

Harlamova29_29 [7]

76 - 12 = 64 - 7 = 57

3 0

3 years ago

A particle moves on the hyperbola xy=18 for time t≥0 seconds. At a certain instant, y=6 and dydt=8. What is x that this instant?

professor190 [17]

Answer:

The value of x at this instant is 3.

Step-by-step explanation:

Let $x\cdot y = 18$ , we get an additional equation by implicit differentiation:

$x\cdot \frac{dy}{dt}+y\cdot \frac{dx}{dt} = 0$ (1)

From the first equation we find that:

$x = \frac{18}{y}$ (2)

By applying (2) in (1), we get the resulting expression:

$\frac{18}{y}\cdot \frac{dy}{dt}+y\cdot \frac{dx}{dt} = 0$ (3)

$y\cdot \frac{dx}{dt}=-\frac{18}{y}\cdot \frac{dy}{dt}$

$\frac{dx}{dt} = -\frac{18}{y^{2}} \cdot \frac{dy}{dt}$

If we know that $y = 6$ and $\frac{dy}{dt} = 8$ , then the first derivative of x in time is:

$\frac{dx}{dt} = -\frac{18}{6^{2}} \cdot (8)$

$\frac{dx}{dt} = -4$

From (1) we determine the value of x at this instant:

$x\cdot \frac{dy}{dt} = -y\cdot \frac{dx}{dt}$

$x = -y\cdot \left(\frac{\frac{dx}{dt} }{\frac{dy}{dt} } \right)$

$x = -6\cdot \left(\frac{-4}{8} \right)$

$x = 3$

The value of x at this instant is 3.

4 0

3 years ago

Please help me i will give biranlyest to who gets this done for me. thank you just do 2,3,4

morpeh [17]

Answer:

2: 6+4+6= 16

3: 6+6+9+9+18=48

4: 6+2+12+3+8= 36

I really hope this helped I’m not very Experienced in this.

6 0

2 years ago

Would it be 1/5 ?? i'm not sure how to do probability

Sidana [21]

Answer:

Choice A

Step-by-step explanation:

5 red socks, 2 white socks, 3 blue socks = 10 socks

1 st sock red : 5 / 10

2nd sock red : 4/9

we didn't put the sock back

a pair of red socks

5/10 * 4/9 = 20/90 = 2/9

8 0

3 years ago