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2 years ago

PLS HELP ME OR ILL ME PLS :_:::::

Mathematics

2 answers:

iragen [17]2 years ago

4 0

Its 30, i multiplied 6x5 and got 30 so im sure its the answer

Gemiola [76]2 years ago

3 0

The answer is probably 30

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I need help finding the answer to this question on edge.

Aliun [14]

Answer:

Step-by-step explanation:

We need to evaluate :-

$\rm\implies \displaystyle\rm\sum^4_n (-1)^n (3n + 2 )$

Here the $\Sigma$ is the sum operator . And here we need to find the sum from n = 1 to n = 4 . We can write it as ,

$\rm\implies (-1)^1 ( 3*1 +2) + (-1)^2 ( 3*2+2) + (-1)^3(3*3+2) + (-1)^4(3*4+2)$

Now we know that for odd powers of -1 , we get -1 and for even powers we get 1 . Therefore ,

$\rm\implies -1 ( 3 + 2 ) + 1 (6+2)+-1(9+2)+1(12+2)$

Now add the terms inside the brackets and then multiply it with the number outside the bracket . We will get ,

$\rm\implies -1 * 5 + 1 * 8 + -1*11 + 1*14 \\\\\rm\implies -5 + 8 - 11 + 14 \\\\\rm\implies\boxed{\quad 6 \quad}$

Hence the required answer is 6.

6 0

2 years ago

The volume of the cylinder is 392 cm cubed work out the length

Alik [6]

Well if you are given the radius, you can solve for it. As the volume of a cylinder is area of the base which is a circle times it height.

B • h = Pi r ^2 • h = 392 cm^3.

H = 392/Pi r^2.

This is the height or length.

8 0

2 years ago

I have to find out if there equivalent? 96 miles on 4 gallons,380 miles on 15 gallons?

erik [133]

24 miles is 1 gallon so 360 miles is 15 gallons + 24 is 384 miles so they are not equivalent!

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2 years ago

Read 2 more answers

Please help due by 10:10!!!!!!!!!!

sertanlavr [38]

Answer:

yes

Step-by-step explanation:

distributing gets you 8x+ 12= 2x-2 +6x+14

8x+12=8x+12

when both sides are simplified, they are equal to each other. This means that there IS a value of x that would make the perimeters equal

not sure what the drop down answers are so hope this helps

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2 years ago

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MArishka [77]

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