Solve using the distributed property -4(2x-5)=4

Mathematics

2 answers:

finlep [7]3 years ago

8 0

-4(2x-5)=4

-8x+20=4

-8x=4-20

-8x/-8= -16/-8

x=2

Scorpion4ik [409]3 years ago

7 0

First you multiply -4 times 2x=-8x.
Then you multiply -4 and -5=20
so -8x+20=4
You subtract 20 on outside of the equal sign.(Because if you do something on one side of the equal sign you have to do it to the other side.)
-8x=-16
then you divide -8 on both sides of the equal sign
x=2

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In a triangle ABC, if <B = 60° and the ratio of two sides is a: c= 2: square root 3+1, then <A=

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Your answer is 75°.

To answer this question you need to use both the cosine rule and the sine rule. First, we need to find the length of side b by using the cosine rule, where a = 2 and c = √3 + 1. Then you substitute these into the equation:

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