3 years ago

The sum of √9 and √7 is irrational. True False??

1 answer:

3 0

Yes because you can simplify sqrt 9 into 3 so you get 3 sqrt 7 and this is irrational because both the numbers are prime

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Help PLS!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! I DON'T KNOW WHAT I AM DOING WRONG

leva [86]

Answer:

EIM

Step-by-step explanation:

simentrical side cuting.then the other side also same area

8 0

3 years ago

A salesman makes 5% commission on sales. what is his commission on $4,321 worth of sales? 216.05 2,160.50 8,642.00 86,420.00

Free_Kalibri [48]

216.05 is the answer because you have to divide $4,321 by 100, and multiply that by 5.

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3 years ago

Twice a number is increased by seven

ryzh [129]

Answer:

Step-by-step explanation:

twice a number is increased by 7.....let x represent the number

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7 0

3 years ago

Evaluate the double integral ∬R(2x−y)dA, where R is the region in the first quadrant enclosed by the circle x^2+y^ 2= 4 and the

frez [133]

Answer:

Step-by-step explanation:

We are to integrate the function

$f(x,y) = 2x-y$

over the area enclosed by the circle

$x^2+y^2 =4 \\x=0\\y=x$

Convert into polar coordinates

$dA=rdr dt$

x=rcost and y = rsint

Since the lines are x=0 and y=x we find that t varies from 0 to pi/4

$2x-y =2rsint-rcost$

Double integral will become now

$\int\limits^\frac{\pi}{4} _0 \int\limits^2_0 2rcost -rsint dt\\=\int\limits^\frac{\pi}{4} _0 r^2 cost -r^2sint /2 dt\\= r^2 sint - r^2 cost/2$

(since variables are independent here)

Substitute for r and t

4 sin pi/4 -2 cospi/4

= $\sqrt{2}$

6 0

3 years ago

Use the segmants tanget to a circle theorem to find perimeter of JLNQ

sasho [114]

Answer: 28

Step-by-step explanation:

6 0

2 years ago