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2 years ago

Can somebody please help me.

Mathematics

2 answers:

Lina20 [59]2 years ago

6 0

That’s looks too hard

Burka [1]2 years ago

4 0

Sorry, I cant I find it hard for me too. :(

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Hm uh I dont get it help ?????..........

Angelina_Jolie [31]

Answer: A, D

Step-by-step explanation:

We know that the volume of a cone is $V=\frac{1}{3} \pi r^{2} h$ , so we want to keep $r^{2}h$ constant.

A: $r^{2}h=6^{2} \cdot 3=108$

B: $r^{2}h=5^{2} \cdot 6=150$

C: $r^{2}h=4^{2} \cdot 9=144$

D: $r^{2}h=3^{2} \cdot 12=108$

6 0

2 years ago

PLEASE HELP! URGENT! 30 POINTS!

____ [38]

OK is congruent to MK because MO is a full diagonal that is bisected.

Hope this helps :)

6 0

3 years ago

Read 2 more answers

Perform the indicated operations. Write the answer in standard form, a+bi.<br> 5-3i / -2-9i

Vsevolod [243]

$\huge \boxed{\mathfrak{Answer} \downarrow}$

$\large \bf\frac { 5 - 3 i } { - 2 - 9 i } \\$

Multiply both numerator and denominator of $\sf \frac{5-3i}{-2-9i} \\$ by the complex conjugate of the denominator, -2+9i.

$\large \bf \: Re(\frac{\left(5-3i\right)\left(-2+9i\right)}{\left(-2-9i\right)\left(-2+9i\right)}) \\$

Multiplication can be transformed into difference of squares using the rule: $\sf\left(a-b\right)\left(a+b\right)=a^{2}-b^{2}$ .

$\large \bf \: Re(\frac{\left(5-3i\right)\left(-2+9i\right)}{\left(-2\right)^{2}-9^{2}i^{2}}) \\$

By definition, i² is -1. Calculate the denominator.

$\large \bf \: Re(\frac{\left(5-3i\right)\left(-2+9i\right)}{85}) \\$

Multiply complex numbers 5-3i and -2+9i in the same way as you multiply binomials.

$\large \bf \: Re(\frac{5\left(-2\right)+5\times \left(9i\right)-3i\left(-2\right)-3\times 9i^{2}}{85}) \\$

Do the multiplications in $\sf5\left(-2\right)+5\times \left(9i\right)-3i\left(-2\right)-3\times 9\left(-1\right)$ .

$\large \bf \: Re(\frac{-10+45i+6i+27}{85}) \\$

Combine the real and imaginary parts in -10+45i+6i+27.

$\large \bf \: Re(\frac{-10+27+\left(45+6\right)i}{85}) \\$

Do the additions in $\sf-10+27+\left(45+6\right)i$ .

$\large \bf Re(\frac{17+51i}{85}) \\$

Divide 17+51i by 85 to get $\sf\frac{1}{5}+\frac{3}{5}i \\$ .

$\large \bf \: Re(\frac{1}{5}+\frac{3}{5}i) \\$

The real part of $\sf \frac{1}{5}+\frac{3}{5}i \\$ is $\sf \frac{1}{5} \\$ .

$\large \boxed{\bf\frac{1}{5} = 0.2} \\$

3 0

2 years ago

Pls help i’ll give u a brainlest

goblinko [34]

Answer:

(13×14×6)/3= 364 centimeter cube

I answered wrongly cuz forgot to divide by 3

my mistake

7 0

3 years ago

Read 2 more answers

Turn -3/11 into a decimal

lutik1710 [3]

-0.272727272727272727272727272727

4 0

3 years ago

Read 2 more answers