143=7+8(3-7x) solve and justify

1 answer:

7 0

Justify means plug answer in and verify

so distribute 8(3-7x)=24-56x

143=7+24-56x
143=31-56x
minus 31 both sides
112=-56x
divide both sides by -56
-2=x

justify

plug it back
143=7+8(3-7x)
143=7+8(3-7(-2))
143=7+8(3-(-14))
143=7+8(3+14)
143=7+8(17)
143=7+136
143=143

true

x=-2

You might be interested in

can someone do this dot plot for me :(( plss no links i beg you i would do it my self but i dont get the question will give bran

Rasek [7]

Hope this helps have a nice day

8 0

2 years ago

Is LMN = OPQ? If so name the congruence postulate that applies

devlian [24]

<h2>Explanation:</h2><h2></h2>

The complete question is shown below. As you can see, we know that:

$\triangle LMN \cong \triangle OPQ$

Shapes are congruent if you can turn one into the other by moving, rotating or flipping. If any two triangles have matching side lengths, they're not necessarily congruent. The same happens if they have two matching side lengths, but If triangles have three matching side lengths, then they must be congruent. This is is known as the Side-Side-Side Postulate (SSS). Since in this problem corresponding sides measures the same, therefore we can say that the postulate that applies is:

B. Congruent - SSS