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pentagon [3]
3 years ago
8

Value of 3x^2 +4y^2 if x=2, y=1, and z= -3

Mathematics
1 answer:
Dennis_Churaev [7]3 years ago
4 0

3x^2+4y^2\\\\\text{Put the values of x=2, y=1 and z=-3 to the expression:}\\\\3(2^2)+4(1^2)=3(4)+4(1)=12+4=16

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WILL BE GIVING BRAINLIEST TO RIGHT ANSWERS!!!!!!
ipn [44]

Answer:

1) they will finish 11/30 of the homework in an hour

2) 1/6x + 1/5x = 1

i am not a 100% sure abt #2

8 0
3 years ago
Simplify: 30 - 23 × 3
gogolik [260]
The answer to this question would be 39..here is why:

First you multiply 23 x 3..because multiplication or division always comes before addition or subtraction.

Second, you get the product from 23 x 3 which is 69..and you subtract 30 from that.

Last, after you do that you get an over all answer of 39..

                     
                         Hope this helps!!
4 0
3 years ago
Which property of addition is shown? (3 + 9) + 8 = 3 + (9 + 8)
Illusion [34]

Answer:

Associative Property of Addition

Step-by-step explanation:

Looking at the expression, you can see that the numbers have been grouped differently. Based on the Associative Property of Addition, the sum of the numbers is the same despite the different pairing.

6 0
3 years ago
The midpoint QR is M (-1,2). One endpoint is R (3,4). Find the coordinates of the other endpoint.
butalik [34]

M = (x₁ + x₂)/2  , (y₁ + y₂)/2

(-1, 2) = \frac{3 + x}{2} , \frac{4 + x}{2}

At this point, it is easier to separate the x's and y's into two different equations:

x's: -1 = \frac{3 + x}{2}

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y's: 2 = \frac{4 + x}{2}

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Answer: (-5, 0)

7 0
3 years ago
Last year there were 225 employees and 25 supervisors at Corpcon Company. If 27 more employees are hired, how many supervisors n
MrRa [10]
In order to solve this, you need to put it into a fraction form.

First for every 225 employees there's 27 supervisors.
25 x
___ = ___
225 252

I got the 252 by adding 225+27(who are the new employees)

So then you need to cross multiply. And get them to equal the same number.

So 25×252= 6,300
Then Divide 6,300 by the old denominator 225.
6,300÷225= 28 new employees

Therefore there will be a total of 28 employees.

Hope this helped!
5 0
3 years ago
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