Lesson 4 practice problems.

Mathematics

1 answer:

aivan3 [116]3 years ago

4 0

Answer:

which is the question yours asking help for

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HELLO CAN ANYONE ANSWER THIS PLEASE I WILL MARK YOU THE BRAINLIEST !!!

Arte-miy333 [17]

25 degrees is the answer. CBE is supplementary to ABC. That means those two angles add up to 180 degrees.

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2 years ago

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How do you do this problem 1/4 +4x/5=11/20?

Nutka1998 [239]

$\frac{1}{4}+\frac{4}{5}x=\frac{11}{20}\\\\\frac{4}{5}x=\frac{11}{20}-\frac{1}{4}\\\\\frac{4}{5}x=\frac{11}{20}-\frac{5}{20}\\\\\frac{4}{5}x=\frac{6}{20}\ \ \ \ \ \ \ |\cdot\frac{5}{4}\\\\x=\frac{30}{80}=\frac{3}{8}$

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3 years ago

Find the value of the expression 2xy^3 if x=3 and y=-2?

Nadusha1986 [10]

So this question basically asks what is 2 x 3 x -2³ and that equals 6 x -8 = -48

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3 years ago

If x+y=6 and xy =2find x³+y³(please help me fast with explanation also please) T^T

Maurinko [17]

Answer: x³+y³=180

Step-by-step explain: let's remember the formula x³+y³=(x+y)(x²-xy+y²) and also x³+y³=(x+y)³-3xy(x+y) then $\displaystyle\boldsymbol{ x^3+y^3=\underbrace{(x+y)^3}_{6}-3\underbrace{xy}_{2}\underbrace{(x+y)}_6}=\\\\6^3-3\cdot 2\cdot 6=216-36=180$