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4vir4ik [10]
3 years ago
8

I WILL MARK BRAINIEST

Mathematics
2 answers:
Orlov [11]3 years ago
7 0

Answer:

m1 = 60°

m2 = 90°

m3 = 30°

m4 = 60°

Step-by-step explanation:

m<5 + m<4 = 180° ( on a straight line)

120° + m<4 = 180°

m<4 = 60°

m<2 = m<3 + m<4

90° = m<3 + 60° ( on a straight line)

m<3 = 90° - 60°

m<3 = 30°

m<1 + m<2 + m<3 = 180°

m<1 = 180 - 90 -30

m<1 = 60°

Romashka [77]3 years ago
6 0

Answer:

m<4= 60

m<1=60

m<3=30

Step-by-step explanation:

I'd like to explain but I would be very difficult to do with out being in person

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The mean age of 5 people in a room is 40 years. A person enters the room. The mean age is now 40. What is the age of the person
ad-work [718]

Answer:

40

Step-by-step explanation:

5 people in the room have  5*40 = 200 years altogether

a new person is X years old.

Now 6 people have (200 + x) years altogether.

Mean age of 6 people  is (200+x)/6. and it is also = 40.

So,

(200+x)/6 = 40

200 + x = 240

x = 40

6 0
3 years ago
Bill and jenna are solving the quadratic equation x 2 - x = 12. bill solved this way jenna solved this way x 2 - x = 12 x(x - 1)
goldfiish [28.3K]

Jenna is correct and Billy is wrong because the equation was not converted to a quadratic form.

<h3>Form of quadratic equation</h3>

The form of quadratic equations is given as

ax2 + bx + c = 0

So, for the quadratic equation, we have

x² - x = 12

Let's make it into quadratic form

x² - x - 12 = 0

Bill solved it as

x(x - 1) = 12

This is wrong, because quadratic equations must be written in the form before solving for the variables

Jenna solved it as

x 2 - x - 12 = 0

Jenna is correct because she converted the equation to a quadratic form before solving for the variables.

Thus, Jenna is correct and Billy is wrong because the equation was not converted to a quadratic form.

Learn more about quadratic equations here:

brainly.com/question/7784687

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6 0
2 years ago
Select all expressions that are equivalent to<br> 3 x 8 x (-9)
densk [106]

Answer:

-216

I dont know if that's right

6 0
3 years ago
I need help with math, I have no idea what I'm doing
Masteriza [31]
A. (x+3)(4x+5)
(multiply x with 4x+5 then multiply 3 with 4x+5)
=4x^2+5x+12x+15
=4x^2+17x+15
b,c, and d are similar
5 0
3 years ago
What is 0.08 written as a percent?
Vera_Pavlovna [14]
To convert ANY decimal to a percent we have to multiply by 100. Lets do it:- 

0.08 × 100 = 8
So, the answer choice that best matches this is, c. 8%.

To convert ANY percent to a decimal we have to divide by 100. Lets do it:-

12.4 ÷ 100 = 0.124
So, the answer to What is 12.4% written as a decimal would be 0.124.

Hope I helped ya!! xd
5 0
3 years ago
Read 2 more answers
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