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maw [93]
3 years ago
12

Evaluate the expression 6x + 21y when Y = 4 x=3

Mathematics
2 answers:
stira [4]3 years ago
5 0

Answer:

102

Step-by-step explanation:

You have to substitute x and y. Since x = 3 and y = 4, you would write the equation as 6(3) + 21(4). Multiply that, and you get 18 + 84. Add that together, and you get the answer 102.

nadya68 [22]3 years ago
4 0

Answer: 102

Step-by-step explanation: 6x + 2y

                                             6(3) + 21(4)

                                             18 + 84

                                             102

basically you just plug in 4 where it says y in the equation and plug in 3 where it says x in the equation and solve :))

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Is y=3x-5 and 6x=2y+10 a solution
iVinArrow [24]
Y=3x-5
y-3x=-5
Times 2 from both side
y(2)-3x(2)=-5(2)
2y-6x=-10
Times negative from both side
(-)2y-6x(-)=(-)-10
-2y+6x=10
or
6x-2y=10


6x=2y+10
6x-2y=10
Furthermore, we see that both equation have the same 6x-2y=10 which means that both of them have infinity solutions, not a solution. Hope it help!
5 0
3 years ago
What table could represent a linear function??? plz help
Strike441 [17]

Answer:

2

Step-by-step explanation:

the column (x) the numbers go up by 4 every time and the (y) column goes up  by 7 every time

6 0
3 years ago
F(7)=3/x+2-squar root x-3
leonid [27]
Insert x = 7
so 3/(7+2) - sqr (7-3)
=3 / (9) - sqr (4)
= 1/3 - 2
=1/3 - 6/3
= -5/3
8 0
3 years ago
I have been on this question for so long if anyone can help me I would greatly appreciate it. Thank you
Phoenix [80]

Answer:

Step-by-step explanation:

let x be the number

2(x+8)=-4x+4

2x+16=-4x+4

6x=-12

x=-2

8 0
3 years ago
Read 2 more answers
What value of n makes the equation true?
In-s [12.5K]

Answer:

-0.7

Step-by-step explanation:

First do 3.2-1.8= 1.4. So now we know that -2n=1.4. Next you solve for n to get the answer of -0.7 with your answer of the third option.

4 0
3 years ago
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