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lianna [129]
3 years ago
7

Will mark brainliest!!

Mathematics
1 answer:
olga55 [171]3 years ago
8 0
Subtract the two equation from each other
-3x-7y=-66
-10x-7y=-24
--------------------
7x =-42
x=-6
by substituting in equation 1
(-3)(-6)-7y=-66
18-7y=-66
-7y=-84
y=12
so to check we substitute in the first equation

(-3*-6)-(7*12)=-66
18-84=-66
-66=-66
we check the second equations
-10(-6)-7(12)=-24
60-84=-24
-24=-24
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Aleks04 [339]
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PLEASE HELP 80 POINTS!!
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Answer:

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                                       plain                          

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7 0
4 years ago
Solve Similar Triangles (advanced)<br><br> Solve for X.
olganol [36]

Given:

m\angle B=90^\circ, m\angle D=90^\circ, AB=6, BD=4, BC=2, DE=x.

To find:

The value of x.

Solution:

In triangles ABC and ADE,

\angle B\cong \angle D              (Right angles)

\angle A\cong \angle A              (Common angles)

\Delta ABC\sim \Delta ADE              (AA property of similarity)

We know that the corresponding sides of similar triangles are proportional. So,

\dfrac{AB}{AD}=\dfrac{BC}{DE}

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x=\dfrac{10}{3}

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7 0
3 years ago
The area of a rectangular playground enclosure at francis lewis hw is 500 square meters. the lenght of the playground is 5 meter
Alex Ar [27]
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L=W+5
A=(W+5)W
500=W²+5W
W²+5W-500=0

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L=W+5=20+5=25
W=20,
L=25

7 0
4 years ago
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