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3 years ago

FIRST ONE I WILL MARK BRAINLEST I PROMISE!

Mathematics

2 answers:

jarptica [38.1K]3 years ago

6 0

Answer:

i think its negative 9 because The absolute value of −9 is 9

Step-by-step explanation:

have a great day!

worty [1.4K]3 years ago

4 0

Answer:

Step-by-step explanation:

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Help with this!!!!!!

balandron [24]

I’m pretty sure it is 1

6 0

3 years ago

Tabby wants to buy 6 tickets for a show. 4 adult tickets at £15 each and 2 child tickets at £10 each. A 10% booking fee will be

goldfiish [28.3K]

This picture shows the answer and the working out

7 0

4 years ago

The radius of a right circular cylinder is increasing at a rate of 9 inches per minute and the height is decreasing at a rate of

pav-90 [236]

Answer:

$\frac{dA}{dt}=1840.97 in^{2}/min$

Step-by-step explanation:

The equation of the surface of the right circular cylinder is:

$A=2\pi rh+2\pi r^{2}=2\pi(rh+r^{2})$

Now, the rate change of this area will be:

Using the change rule

$\frac{dA}{dt}=\frac{\partial A}{\partial r}\frac{\partial r}{\partial t}+\frac{\partial A}{\partial h}\frac{\partial h}{\partial t}$

Where:

$\frac{\partial h}{\partial t}$ is the rate change of height (-16 in/min)
$\frac{\partial r}{\partial t}$ is the rate change of radius (9 in/min)

$\frac{dA}{dt}=\frac{\partial A}{\partial r}9+\frac{\partial A}{\partial h}(-16)$

$\frac{dA}{dt}=2\pi(h+2r)9-2\pi r16=2\pi((h+2r)9-16r)$

Now, r = 16 and h = 29

$\frac{dA}{dt}=2\pi((29+2*16)9-16*16)$

$\frac{dA}{dt}=1840.97 in^{2}/min$

I hope it helps you!

8 0

4 years ago

When 12x² + kx + 3 and 3x³ + (3k + 2)x² + 28x +17

Naily [24]

Answer:

$\boxed{\sf \ \ \ k=5 \ \ \ }$

Step-by-step explanation:

Hello,

We know that for a real, the polynomial P(x) divided by (x-a) the remainder is P(a)

and as

$3x+2=03x=-2x=\dfrac{-2}{3}$

so we need

$12(\dfrac{-2}{3})^2+k(\dfrac{-2}{3})+3=3(\dfrac{-2}{3})^3+(3k+2)(\dfrac{-2}{3})^2+28\dfrac{-2}{3}+17\\ \ multiply \ by \ 9\\ 12*4-6k+27=-8+4(3k+2)-28*2*3+17*9\\ -6k+48+27=-8+12k+8-168+153\\ -6k+75=12k-15\\ 18k=75+15=90\\ k = \dfrac{90}{18}=\dfrac{15}{3}$

hope this helps

7 0

3 years ago

How are the semicircle and the diameter of a circle related?

givi [52]

The diameter is the line in the middle of a circle. a semicircle is one of the sides of the diameter (half of the circle)

7 0

3 years ago

Read 2 more answers