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3 years ago

I need help cant understand it

Mathematics

2 answers:

user100 [1]3 years ago

8 0

Answer:

105

Step-by-step explanation:

Because the lines are parallel, we know that those angles have to add up to 180. so we just do

x+75=180

or 180-75=105

Len [333]3 years ago

5 0

x+75°=180°

x=180°-75°

x=105°

180°-75° = 105°

please mark this answer as brainlist

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2x + y = 7 -2x - y = 6 Solve systems of equations by substitution

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Answer:

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Step-by-step explanation:

2x + y = 7

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From the first equation:

y = 7 - 2x

Plug this into the second equation:

-2x - (7 - 2x) = 6

-2x + 2x = 6 + 7

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What are the values of a and b

makvit [3.9K]

Answer:

$\large\boxed{B.\ a=8,\ b=4\sqrt5}$

Step-by-step explanation:

We have three similar triangles:

$\triangle ABC\sim\triangle DBA\sim\triangle DAC$

therefore the sides are in proportion:

$\dfrac{AD}{CD}=\dfrac{BD}{AD}$

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and other proportion:

$\dfrac{AB}{BC}=\dfrac{BD}{AB}$

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Trey's chocolate bar is 54% cocoa. If the weight of the chocolate bar is 73 grams, how many grams of cocoa does it contain? Roun

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