The angles of a triangles are x°, 3x° and 30°. When asked to solve for x, Alvi shows the work in post-it A below. Brian shows the work in post-it B below. Who is correct and why? Why mistake did the incorrect person make?

that is the pic for post it a.
the post it b said

x + 3x + 30 = 180
4x + 30 = 180
4x = 150
x = 37.5

Answers

Answer 1

Answer:

See explanation

Step-by-step explanation:

OK. Alvi is incorrect because he didn't add the measures of all 3 angles of the triangle, whereas Brian did. So, Brian is correct and Alvi needs to work on that kind of problem.

Related Questions

Juan has blood type A, Lilly has blood type AB, and Aaron has blood type O. Is this relation a function? Explain.

This relation is a function. Each name in the domain corresponds to exactly two elements in the range of blood types.

This relation is not a function. Each name in The Domain corresponds to exactly two elements in the range of blood types.

This relation is a function. Each name in The Domain corresponds to exactly one element in the range of blood types.

This relation is not a function. Each name in The Domain corresponds to exactly one element in the range of blood types.

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Answer:

This relation is a function

3rd answer

I am confused on how to find the equation for parallel and perpendicular lines and the line parallel and perpendicular to it

Answers

Answer:

Hello what grade is this for?

hey, just number two:)

Answers

Answer:

Step-by-step explanation:

The hypotenuse is 85

The equation for pythagorean theorem is a squared+ b squared= c squared.

7 and 11 squared is 49 and 121

Add them together and then divide the answer by half and you get 85

Jessie hiked 5 1/2 miles on saturday, 6 3/4 miles on sunday, and 2 1/3 miles on monday. How many miles did jessie hiked altogether?

Answers

Answer:

Я дурак

Step-by-step explanation:

Я дурак

Maria is planting a row of flowers in a bed 103 feet long. The instructions say to space the plants 1 foot apart, allowing room for 103 flowers. The flowers come in flats containing 6 plants per flat. How many flats will she need? How many plants will she have left over?

Answers

Answer:

She will need 17 flats and will have 1 plant left over.

Step-by-step explanation:

six can go into 103 17 times, with a remainder of one.

i need the answers quick

Answers

Answer:

1: 4

2:6

3: 13

4: 36

5: 21

6: 15

7: 21

8: 2

9: 6

10: 45

Step-by-step explanation:

add, subtract, multiply, or divide both sides depending on what problem it is.

The cost of an article including 15% for taxes is ghc ghc138. What is the cost of the article without taxes

Answers

Answer:

Cost of article before tax is 120.

Step-by-step explanation:

It says cost of an article including 15% tax is 138.

So, let the cost of article without tax as 'x'

So, we can set up equation as

x+15%(x)=138

Simplify it

x+0.15x=138

1.15x=138

Divide both sides by 1.15

x=120

So, cost of article before tax is 120.

A single die is rolled one time What is the probability of rolling an even number or a 5?

Answers

Answer: 4/6 or 2/3

Step-by-step explanation:

Step-by-step explanation:

Total sample space , n(s) = 6

Favourable cases of rolling even number,

n(e) = 3

Favourable cases of rolling 5 , n(f) = 1

Probability of rolling an even number or a 5 is

= p(e) + p(f)

= n(e) / n(s) + n(f) / n(s)

= 3 / 6 + 1 / 6

= 4 / 6

= 2/3

Hope it will help :)❤

1. A scientist is growing cell cultures and examining the effects of various substances on them as part of his research. The culture in one petri dish increases according to the expression +47 + 4 for timet in minutes. Another increases according to 12 + 2t+4. He needs to feed all the cells equally, so he needs to know the expression for the total number of cells in both dishes because the food is proportional to the total number of cells. Find the expression.

Answers

Pay attention in class

7 (2e-1) - 3 = 6 + 6e
solve for e

Answers

Answer:

e=2

Step-by-step explanation:

14e-7-3=6+6e

14e-10=6+6e

14e-6e=6+10

8e=16

e=2

9 1/2 yards x 19 1/4 yards

Answers

Answer:

(9 1/2) * (19 1/4) = 1463/8 = 182 7/8

Step-by-step explanation:

Conversion a mixed number 9 1/2

to a improper fraction: 9 1/2 = 9 1/2

= 9 · 2 + 1/2

= 18 + 1/2

= 19/2

To find a new numerator:

a) Multiply the whole number 9 by the denominator 2. Whole number 9 equally 9 * 2/2

= 18/2

b) Add the answer from previous step 18 to the numerator 1. New numerator is 18 + 1 = 19

c) Write a previous answer (new numerator 19) over the denominator 2.

Nine and one half is nineteen halves

Conversion a mixed number 19 1/4

to a improper fraction: 19 1/4 = 19 1/4

= 19 · 4 + 1/4

= 76 + 1/4

= 77/4

To find new numerator:

a) Multiply the whole number 19 by the denominator 4. Whole number 19 equally 19 * 4/4

= 76/4

b) Add the answer from previous step 76 to the numerator 1. New numerator is 76 + 1 = 77

c) Write a previous answer (new numerator 77) over the denominator 4.

Nineteen and one quarter is seventy-seven quarters

Multiple: 19/2

* 77/4

= 19 · 77/2.4

= 1463/8

5. Two plumbing companies charge the rates shown in the table. Find
how long the plumbing companies would need to work for Pipeline's
charges to be greater than Down the Drain's.
Hourly Rate
Company
Pipeline
Fixed Charge for Visit
$25.00
$32.50
Down the Drain
$22.50
$50.00

Answers

$32.50
G gg yvybyxrcygijtswerving

PLEASE HELP!! Due today!!

Answers

Answer:

Amira, we can tell by looking at the two graphs

Step-by-step explanation:

the blue graph goes through (1,1) while the red graph goes thur (1,3) so because the y component grows by 3 we know K = 3

What is the area of this figure?

Answers

Answer:

I think the area is 38

Step-by-step explanation:

area =38

Yea it might be 38.

Here are the questions and answers. Please help!

Answers

B - it moved right 1 and down 3

factor out the gcf from each polynomial 30x^2-18x^3+6x^4

Answers

Answer:

Step-by-step explanation:

what's the answers for this question?

Answers

Irrational Is the answer

3/2 is rational

17.2/3 is rational

2.161616 is rational

1.46827514 is rational

29.1156 is rational

which number is greater radical 7 or 2

Answers

Answer:

Step-by-step explanation:

Answer:

radical 7

Step-by-step explanation:

Use your calculator to input radical 7 and you get 2.65

You could also think that 2 is the equivalent of radical 4 - meaning that radical 7 would be more.

A taxi charges $28.00 for a passenger to travel 16 kilometers.What is the unit rate for this porportional relationship?

Answers

The unit rate for this proportional relationship is $1.75/kilometer

willie runs 4 miles in 44 minutes. of willie runs at the same rate, how many miles can he run in 143 minutes?

Answers

d=4 mi
t=44 min
v=d/t
rate is 1/11 mi/min
multiply the rate by 143 to get 13 miles

An equilateral triangle has a side length of 3x^2 - 4x + 9. What is the perimeter of the triangle?

Answers

Answer:

peri=3(3xsq-4x+9)

=9x^2-12x+27

Sea p(x) = 2x + 4, calcular p(5) + p(2

Answers

Answer:

the answer is 7p

Step-by-step explanation:

p(5)+p(2)=7p

Can someone help me with this. Will Mark brainliest. Need answer and explanation/work. Thank you!

Answers

Answer:

I hope this helps a little bit.

THIS IS DUE RN PLEASE HELP!!!

Answers

Answer:

c = 6d

Step-by-step explanation:

the cost is equal to $6/day

This answer ^ is correct

What is the first step when examining a data set

Calculate the mean
Calculate the median
Put the data in order from least to greatest.

Answers

Answer:

3. Put the data in order from least to greatest

How many solutions does. y = -5x + 6
y = 6 - 5x

Answers

Answer: Infinite solutions

Step-by-step explanation:

This system of equations becomes infinite solutions.

Troy has an album that has 400 hockey cards. Each page of the album holds 4 hockey cards. If 19% of the album is empty, how many pages are filled with hockey cards?

Answers

Answer:

81 pages

Step-by-step explanation:

From the information given :

Total hockey cards = 400

Cards per page = 4

Number of pages = 400 /4

Number of pages in album = 100

% of album which is empty = 19%

% filled = 100 - 19 = 81%

81% of 100

0.81 * 100 = 81 pages

Find the length of the missing side of the right triangle.
24 ft
7 ft
O 25 ft
O 31 ft
O 22.96 ft
O 625 ft

Answers

Answer:

25 ft

Step-by-step explanation:

Side² = 24² + 7² = 625

√625 = 25 ft

please help asap i need to finish i will mark brainlest ily

Answers

Answer:

I think it would be 1/3 as 20+40=60 and 20 is 1/3 of what

Answer:

20\40= 0.5 is 1\2

Please please please answer 8 and 9 will give brainliest and give extra points. Please help fast

Answers

Answer: 7) B: n 8) 8 9) 36- degree rotation

Step-by-step explanation: plz mark me brainliest

8 because that is the rotation dilution

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