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kaheart [24]
2 years ago
9

Pls, help im very confused thanks!

Mathematics
2 answers:
puteri [66]2 years ago
4 0

Answer:

D part

Step-by-step explanation:

3x + 80⁰ + 2x = 180⁰ (By Linear Pair)

5x + 80⁰ = 180⁰

5x = 100⁰

x = 20⁰

Hope it helps :)

zloy xaker [14]2 years ago
4 0
Answer:

Option D.

Explanation:

I hope that helps! :)
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Lucy correctly answered 70% of the questions on her science homework.she counted 14 correct answers on her paper .if each questi
disa [49]

Lucy has 20 questions in her science home work

<em><u>Solution:</u></em>

Given that,

Lucy correctly answered 70% of the questions on her science homework

She counted 14 correct answers on her paper

<em><u>To find: Number of questions in her science home work</u></em>

Let "x" be the number of questions in her science home work

From given we can say,

Lucy correctly answered 70% of questions

She counted 14 correct answers

70 % of total questions = 14 correct answers

70 % of x = 14

70 \% \times x = 14\\\\\frac{70}{100} \times x = 14\\\\0.70x = 14\\\\x = \frac{14}{0.70}\\\\x = 20

Thus Lucy has 20 questions in her science home work

4 0
3 years ago
If a+b+c =0 show that a³+b³+c³= 3abc
slega [8]

Answer:

Step-by-step explanation:

a+b+c=0, a+b=-c,a+c=-b, b+c=-a

(a+b+c)^3=(a+b+c)^2*(a+b+c)=(a^2+b^2+c^2+2ab+2ac+2bc)*(a+b+c)=

a^3+ab^2+ac^2+2a^2b+2a^2c+2abc+a^2b+b^3+bc^2+2ab^2+2abc+2b^2c+a^2c+b^2c+c^3+2abc+2ac^2+2bc^2=a^3+b^3+c^3+3a^2b+3a^2c+3ac^2+3ab^2+3bc^2+3b^2c+6abc=

a^3+b^3+c^3+3a^2*(b+c)+3c^2(a+b)+3b^2(a+c)+6abc=

a^3+b^3+c^3+3a^2*(-a)+3c^2*(-c)+3b^2*(-b)+6abc=

a^3+b^3+c^3-3a^3-3c^3-3b^3+6abc=

6abc-2a^3-2b^3-2c^3=2(3abc-a^3-b^3-c^3)=

2*[3abc-(a^3+b^3+c^3)]=0

so 3abc-(a^3+b^3+c^3)=0

so a^3+b^3+c^3=3abc

7 0
3 years ago
Will give first person to answer brainliest!! At a local baseball game, tickets cost $4 for adults and $2 for students. If there
S_A_V [24]

Answer:

let x adult and y student attended

x+y= 94

x=94-y

again

4x+2y = 294                               53 adults and 41 student attended

376-4y+2y =294                                           the  event

2y =82

y=41

substituting the value of y in

x+y =94

x= 94-41 = 53

Step-by-step explanation:

8 0
3 years ago
Which of the following is always true about lines of symmetry?
madam [21]
What are the answers being provided ?
4 0
3 years ago
Find the reciprocal of 5/7
Marina CMI [18]

Answer:

7/5

Step-by-step explanation:

reciprocal means flip the equation

7 0
3 years ago
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