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3 years ago

If you rewrite the problem 14(22) as 14(20+2) so that you can use mental math, which of the following properties will you use?

1 answer:

7 0

For this case, the property you can use is the following:
Commutative property.
We have then that:
14 (20 + 2) = 280 + 28 = 308
Equivalently:
14 (2 + 20) = 28 + 280 = 308
Either way the result is exactly the same.
Answer:
Commutative property.

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Can you walk me through on how to do this

denpristay [2]

Answer:

h=v/πr²

Step-by-step explanation:

v=πr²h

v/π=r²h

v/πr²=h

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3 years ago

8x + 5y = 22<br> -8x + y = 14

finlep [7]

Answer:

Y = 6 X=-1

Step-by-step explanation:

Add the numbers 8x+-8x=0. 5y+y=6y. 22+14=36
So that means 6y=36. So Y would equal 6
Substitute the values it one of the original equations. 8x + 5(6) =22. 8x+30=22
Minus 22 from both sides.
That would give you 8x=-8
So x would equal - 1

3 0

2 years ago

Read 2 more answers

How many solutions does the equation have?<br> x^4 + 7x^2 – 144 = 0

Amiraneli [1.4K]

Answer:

The equation has no real solutions. It has 2 imaginary, or complex solutions.

Step-by-step explanation:

7 0

2 years ago

How can I estimate 26×22

natulia [17]

Answer:

Hi if you are simply looking to estimate 26x22 then you could round each number to get 30x20 and that would make 600 your estimate! Hope this helps!

3 0

3 years ago

2x + 3y = 7 3x + 2y = 8

Kipish [7]

Answer:

$\boxed{\sf \ \ \ x=2, \ \ y =1 \ \ \ }$

Step-by-step explanation:

Hello,

Pls post the full question next time so that we can make sure what is expected.

I assume that you want to solve for (x,y)

(1) 2x + 3y = 7

(2) 3x + 2y = 8

2*(2)-3*(1) gives

2*3x + 2*2y - 3*2x - 3*3y = 2*8 - 3*7 = 16 - 21 = -5

6x - 6x + 4y -9y = -5

-5y=-5

y = 1

and we can replace in (1)

2x + 3*1 = 7

2x = 7 - 3 = 4

x = 2

hope this helps

7 0

3 years ago