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kifflom [539]
3 years ago
10

Solve each system by elimination.

Mathematics
1 answer:
max2010maxim [7]3 years ago
8 0

Answer:

Step-by-step explanation:

-x-2y+4z=-14

x=-2y+4z+14

2x+2y+2z=-6

2x=-2y-2z-6

x= -y-z-3

-x-6z=-3

x=3-6z

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Write this expression so that its denominator, if any, is a positive integer.<br> 2/(3+sqrt(7))
Tanzania [10]

Answer:

The Answer is 3 - sqrt7

Step-by-step explanation:

2/3 + sqrt7   the starting equation

You multiply it by the conjugate which is 3 - sqrt7

= 2(3 - sqrt7) / (3 + sqrt7) (3 - sqrt7)  the equation after you multiply by 3 - sqrt7

(3 + sqrt7) (3 - sqrt7) = 2

= 2(3 - sqrt7) / 2    the equation after you simplify (3 + sqrt7) (3 - sqrt7)

Divide out the 2's

= 3 - sqrt7/1    the equation after you divide out the 2's

= 3 - sqrt7  is THE ANSWER

7 0
2 years ago
Evaluate AB for A = 5, B =-2, C = 4 and D = -6.<br> 5/12<br> -5/12<br> -3/2<br> 3/2
Nezavi [6.7K]

Answer:

AB = -10

Im confused is this what you wanted?

5 0
3 years ago
A random sample of bolts is taken from inventory, and their lengths are measured. The average length in the sample is 5.3 inches
LekaFEV [45]

Answer:

L_x=5.3 inches

Step-by-step explanation:

Average length \=x =5.3 inches

Standard deviation \sigma=0.2 inches

Sample size n=50

Generally The point estimate for the mean length of all bolts in inventory is

L_x= \=x

L_x=5.3 inches

3 0
3 years ago
Please look at photo and help me I will mark who ever is first
maksim [4K]

Answer:

a = 9

Step-by-step explanation:

you can simplify the proportion to:

\frac{a}{24} =\frac{3}{8}

use cross- multiplication

8a = 72

a = 9

5 0
3 years ago
Two factory plants are making TV panels. Yesterday, Plant A produced 6000 panels. Seven percent of the panels from Plant A and 2
azamat

Answer:

1% of 4000 + 4% of B = 2% of (4000 + B)

40 + 0.04*B = 0.02( 4000 + B)

40 + 0.04* B = 80 + 0.02*B

40 + 0.04*B - 80 - 0.02B = 0

0.02*B - 40 = 0

0.02*B = 40

2B = 4000

B = 2000

Step-by-step explanation:

7 0
3 years ago
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