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Sladkaya [172]
3 years ago
11

Someone who's good at math please help me!!!

Mathematics
1 answer:
timurjin [86]3 years ago
8 0
#1.
Here what you do is cross multiply.
\frac{8x}{13x}
#2.
Same as #1, just cross multiply.
\frac{9x}{12}

You get the gist?
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In parallelogram DEFG, DH = x + 5, HF = 2y, GH = 4x-3 and HE = 4y + 1. Find the values of x and y. The diagram is not drawn to s
GalinKa [24]
Rule: The diagonals of any parallelogram bisect each other. In other words, they cut each other in half.

This means DF is cut into two equal pieces: DH and HF.
Similarly, GE is cut into two equal pieces: GH and HE.

DH = HF
x+5 = 2y
x = 2y-5

GH = HE
4x-3 = 4y+1
4(x)-3 = 4y+1
4(2y-5)-3 = 4y+1 ... x has been replaced with 2y-5
8y-20-3 = 4y+1
8y-23 = 4y+1
8y-4y = 1+23
4y = 24
y = 6

If y = 6, then x is
x = 2y-5
x = 2(6)-5
x = 12-5
x = 7

--------------------------------------------

Answers: 
x = 7 and y = 6

5 0
3 years ago
Does anyone knows this please!<br><br> -2x x 5x<br> -(8x)^2
satela [25.4K]

Answer:

-74x^2

Step-by-step explanation:

-2x x 5x -(8x)^2

-10x^2-(8x)^2

-10x^2-64x^2

-74x^2

7 0
3 years ago
Which rational number equals 0.5 ?
pshichka [43]
1/2 is equal to 0.5.

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Answer:

77.78

Step-by-step explanation:

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