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:
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
Can someone help me and give an explanation
Answers
Two triangles: left triangle with y degrees and 40 degrees and right triangle with x degrees.
40 degrees from the left triangle, when adding with the unknown angle of the right triangle, is equal to 180 degrees. Adding left triangle's (third) undetermined angle and x degrees angle (the other same angle), is equal to 90 degrees. The right triangle is an isosceles triangle, meaning two equal angles, and one of them is x degrees. Thus, the other same angle is also x degrees.----------------------------------------------------------------------------------------------------------
1) Subtract 180 - 40 = 140 degrees. 140 degrees is the unknown angle of right triangle.
2) 140 + x + x = 180 (equation)
140 + 2x = 1802x = 180 - 1402x = 40 x degrees = 20 degreesANSWER: x = 20 DEGREES
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1) With knowledge of x degrees being 20 degrees, the other same angle is 20 degrees, too.
2) Subtract 90 - 20 = 70 degrees. 70 degrees is the (third) undetermined angle
of left triangle.
2) 70 + 40 + y = 180
110 + y = 180y = 180 - 110y = 70 degreesANSWER: y = 70 DEGREES
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Whew. Hope this helps you out, and let me know asap if you're confused on any part.
Plane tickets to Chicago usually cost $120. On a travel deal website, you scored a coupon for 35% off. Your budget for the trip allows you to spend a hundred dollars on a ticket; can you go?
Answers
Answer: yes it’s 78$
Step-by-step explanation: The difference is 42.00
Kara donated 28 books to the book drive. Shawn donated some books. Kara donated 4 times as many books as Shawn.
What you have to do to solve the question:
Draw a diagram to represent Kara and Shawn's books, then solve how many books Shawn donated. can you draw it in a 4th grade way cuz im in 4th grade thank you.!
Answers
Answer:
i dont know how to make diagram for it but
Step-by-step explanation:
shawn donated 7 books
Which of the following is an equation of a line that is parallel to one whose equation is y = 5x - 3?
Answers
What is the perimeter of the composite figure?
Enter your answer in the box.
perimeter = yd
Answers
Answer:
what
Step-by-step explanation:
for your answer of this question
perimeter =sum of all side.
sorry I am unable to find perimeter without figure.
answer this mannnn i need hemo
Answers
a is to the right of the positive number 1 on the number line. Subtracting 1 from a will give a result that is still to the right of zero, which means a positive number.
What should be true in order for a scatter plot to show that a linear fit may be appropriate for a data set?
O The points should form an upward curve.
O The points should be scattered randomly.
O The points should appear to lie generally along a line.
O The points should form one line above the x-axis and another below it.
Answers
On a scatter plot, the points are randomly placed around the graph. The correct option is B.
What is a scatter plot?A scatter plot is a type of plot or mathematical diagram using Cartesian coordinates to display values for typically two variables for a set of data. If the points are coded, one additional variable can be displayed.
A scatter (XY) plot is a vertical data visualization method for displaying the relationship between two sets of data. It is a graphical display of data that consists of a collection of points plotted in a two- or three-dimensional plane.
The locations of the points in a scatter plot are chosen at random. The best choice is B.
To know more about scatter plots follow
https://brainly.com/question/6592115
#SPJ6
Select the expression that can be used to find the volume of this rectangular prism. A. ( 6 × 3 ) + 15 = 33 i n . 3 (6×3)+15=33 in.3 B. ( 3 × 15 ) + 6 = 51 i n . 3 (3×15)+6=51 in.3 C. ( 3 × 6 ) + ( 3 × 15 ) = 810 i n . 3 (3×6)+(3×15)=810 in.3 D. ( 3 × 6 ) × 15 = 270 i n . 3
Answers
Answer:
D
Step-by-step explanation:
(3x6)x15=270 in
the volume formula is base times width times height.
Answer:
D
Step-by-step explanation:
i took the quiz
Find the location of the center of a circle if the endpoints of the diameter are at (-10,
-5) and (8,4).
Answers
Answer:
(- 1, - [tex]\frac{1}{2}[/tex] )
Step-by-step explanation:
The centre is located at the midpoint of the diameter.
Using the midpoint formula , then
centre = [tex]\frac{-10+8}{2}[/tex], [tex]\frac{-5+4}{2}[/tex] ) = ( [tex]\frac{-2}{2}[/tex], [tex]\frac{-1}{2}[/tex] ) = (- 1, - [tex]\frac{1}{2}[/tex] )
Triangle DEF is similar to triangle D'E'F'.Triangle D E F is rotated about point F and is shrunk to form triangle D prime E prime F prime. Which similarity transformation could map △DEF to △D'E'F'? dilation and reflection dilation and translation rotation and dilation rotation and reflection
Answers
Answer:
The answer is "Rotation and dilation".
Step-by-step explanation:
The rotation is a spatial movement, which maintains at least one stage. The dilation of a transition affects a figure's dimensions. The center, as well as a scale factor k, are required Which meaning k determines if the expansion is an expansion or a decrease, therefore the above choice is correct because it just rotated and dilated from its original form.
Answer:
A i think
Step-by-step explanation:
Can someone help me and leave a description of how to do the problem? I need help asap!
Answers
Answer:
Step-by-step explanation:
can someone help pls
Answers
Answer:
the answer is 216 sq cm.
Step-by-step explanation:
Do 12×14=168. Then 12×8=96. Then 96/2=48. Then add 168+48=216.
Answer:
216
Step-by-step explanation:
12x 14=168
8x12=96
96/2=48
168+48=216
1) How many fourths are in one whole?
2) How many eighths are in one whole?
3) How many thirds are in one whole?
PLEASE HELP ASAP
Answers
Answer:
4 fourths are in one whole
8 eighths are in one whole
and 3 thirds are in one whole
Step-by-step explanation:
The length of a rectangle is 4 times the width, w. Which expression represent the perimeter of the rectangle
Answers
Answer:
10w
Step-by-step explanation:
→ Work out the length
4 × w = 4w
→ State width
w
→ Find perimeter
4w + 4w + w + w = 10w
Aaron answered 7 out of 12 questions correctly on his last English quiz. Find his grade
to the nearest whole percent.
Answers
which would give you 0.58
so that’s 58%
Answer:
Step-by-step explanation:
58%
7/12 into a percentage
Pls help math problem
Answers
Answer:
angle plm+angle lpm+angle pml=180°[by angle sum property]
21°+angle lpm+38°=180°
59°+ lpm=180°
lpm=180°-59°
lpm=121°
lpm+npl=180°[by limear pair]
121°+npl=180°
npl=180°-121°
npl=59°
Please help ASAP I’m really confused please help!!!
Answers
Answer:
top right pls give brainliest
Step-by-step explanation:
Help plsss
Calculate the area
Answers
Answer:
140 feet squared
Step-by-step explanation:
Let's do this step by step. First, let's find the area of the rectangle, which is 8 times 10. It equals 80. Next, do the trangle. 6 times 10 is 60. So, 60 plus 80 equals 140.
Answer:
area of rectangle =L*B
8*10=80ft^2
area of triangle=1/2b*h
h is 8 ft
1/2*6*8
3*8
24ft^2
total area is 80+24
104ft^2
nearest tenth = 100 ft^2
Which function is represented by this graph?
A: f(x)=|x+7| - 3
B: f(x) = |x - 7| - 3
C: f(x) = |x + 3| - 7
D: f(x) = |x - 3| - 7
Answers
Answer: B
Step-by-step explanation: B
B :)
The daily advertising revenue (in dollars) for a local newspaper is given by the function R(t) = -18t2 + 720t – 103, where t is number of years that the paper has been in production. What is the daily advertising revenue after the paper has been in business for 15 years?
Answers
Answer:
6647
Step-by-step explanation:
The computation of the advertising revenue for 15 years is shown below:
Given that
r(t) = -18t^2 + 720t - 103
where
t = number of years = 15
now put the value of t in the above equation
= -18(15)^2 + 720(15) - 103
= -4050 + 10,800 - 103
= 6647
can someone please answer i will mark brainliest
Answers
b) 120
c) the donations are decreasing as years increase
Answer:
a. 2007
b. 120,000
c. the amount of money raised each year is decreasing
Step-by-step explanation:
sorry if im wrong just pay very close attention to the graph
PLZ HELP THIS IS TIMED;((((((
Answers
Answer:
34
Step-by-step explanation:
Diameter is twice length of radius
Answer:
Diameter=34 cm
D.
Step-by-step explanation:
Diameter=radius*2
17*2=34 cm
Plzzzz help Lia brought 21 shirts and plants. Her total was $357. Pants cost $25 each, and shirts cost $14.50 each. How many of each item did she buy?
I will give you brainliest and 15 points
Answers
Answer:
she brought 21 shirts and 2 pants
Step-by-step explanation:
shirts
21× 14.50 = 304.5
357- 304.5 = 52.5
pants
52.5 ÷ 25 = 2.1
One year, the population of a city was 335,000. Several years later it was 314,900. Find the percent decrease.
Answers
dennis had four children. Each child had three kids.
Answers
Answer: ok lol so what is you question
Step-by-step explanation:
I WILL GIVE BRAINLIEST!!!
Answers
Answer:
Step-by-step explanation:
What is 5x+24=134 thank you so mich have a wonderful day
Answers
Answer:
x = 22
Step-by-step explanation:
5x + 24 = 134
134 - 24 = 110
110 / 5 = 22
x = 22
What is the expression?
Answers
Answer:
12(2r + 3) is the completed form.
Can someone plz help me
Answers
the area is 254.34 sq. ft.
Answer:
254.34 ft²
Step-by-step explanation:
diameter = 18 feet
radius = 18/2 = 9 feet
Area = pi x r²
= pi x 9²
= pi x 81
= 254.34 ft²
what's the seventh term
1,2,3,4,5,.....
Answers
Answer:
understand
Step-by-step explanation:
hope it's helpful for you