3 years ago

Plz help with these questions

Mathematics

1 answer:

Hitman42 [59]3 years ago

7 0

Maybe try multiplying them

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If q is the midpoint of segment PR, find the coordinates of R if P (11,-2) and Q (4,3)

Murrr4er [49]

Answer:

R(-3, 8)

Step-by-step explanation:

R = 2Q -P

R = 2(4, 3) -(11, -2) = (8-11, 6+2)

R = (-3, 8)

_____

You can derive the formula for the endpoint from the formula for the midpoint:

Q = (R + P)/2

R = 2Q - P . . . . . . multiply by 2 and subtract P

3 0

3 years ago

Find the area of each circle. Round to the nearest tenth. Use 3.14 or 22/7 for pie

Ray Of Light [21]

Answer:

Step-by-step explanation:

What

are you calculating area or circumference??

7 0

3 years ago

Gravel is being dumped from a conveyor belt at a rate of 30 ft3/min, and its coarseness is such that it forms a pile in the shap

pogonyaev

Answer:

Rate of increase in height = $\frac{dh}{dt}=0.3156ft/min$

Step-by-step explanation:

we know that volume of a cone is given by

$V=\frac{1}{12}\pi d^{2}h$

It is Given that diameter equals height thus we have

$V=\frac{1}{12}\pi h^{2}h\\\\V=\frac{1}{12}\pi h^{3}$

Differentiating both sides with respect to time we get

$\frac{dV}{dt}=\frac{1}{12}\pi \frac{dh^{3}}{dt}\\\\\frac{dV}{dt}=\frac{1}{12}\pi(3h^{2}\frac{dh}{dt})$

Applying values and solving for $\frac{dh}{dt}$ we get

$\frac{dh}{dt}=\frac{12\frac{dV}{dt}}{3\pi h^{2}}\\\\\frac{dh}{dt}=0.3156ft/min$

8 0

3 years ago

What is the solution set for -4 x - 10 ≤ 2?<br> A. x ≤ -3<br> B. x ≥ -3<br> C.x ≤ -3<br> D. x ≥ 2

kramer

Answer:

B. x ≥ -3

Step-by-step explanation:

-4 x - 10 ≤ 2

add ten by both sides

-4x≤12

divide -4 by both sides

x ≤ -3

BUT because you divded you have to switch the sign so

x ≥ -3

6 0

3 years ago

Read 2 more answers

Which is the best estimate of the product of the fractions? 4/7x8/9x14/15

Alex17521 [72]

Answer:

Step-by-step explanation:

so I calculated this and I got a fraction

I got 64/135

7 0

3 years ago