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kobusy [5.1K]
4 years ago
8

If 4u-5v=23 and 2u+4v=-8, find the value of u+v

Mathematics
1 answer:
DIA [1.3K]4 years ago
6 0

Answer:

-1

Step-by-step explanation:

4u-5v=23

-2(2u+4v=16) We multiply by -2 here to destroy u's.

4u-5v=23

-4u-8v=16 we addition both processes

-13v=39 so, v=-3

4u-5(-3)=23, 4u=8 so, u=2

u+v= -3+2= -1

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MaRussiya [10]
Option 1 : -22

using formula

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3 years ago
Point F is the midpoint of segment DE. DF = 2x+6 and DE = 2x+36. Find DE.
tensa zangetsu [6.8K]

Answer: It already tells you what DE= 60

Step-by-step explanation:

Since F is the midpoint of DE that means DF=FE

So create equation 2x+6+2x+6=4x+12

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So you write the equation 4x+12=2x+36 to find x and once x is found substitute your answer for x

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4x=2x+24 subtract 2x on both sides 4x-2x=2x

2x=24 divide 2 into both sides 24/2=12 x=12

4(12)+12=2(12)+36  

4x12=48+12=60   2x12=24+36=60

5 0
3 years ago
Which function is equivalent to y=3(x−2)^2+6?
omeli [17]
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I have completed everything except for the last box. Can someone please help me on the last box? Thank you for your help!
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Answer:

2.5\%

Step-by-step explanation:

From the Empirical Rule, 95% of the data shown falls between 63 and 95. The other 5% is evenly distributed to each side (since the distribution is bell-shaped), hence there being \boxed{2.5\%} of scores less than 63.

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3 years ago
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