PLS help. 30 points and brainliest
In triangle ABC, a = 3, b = 5, and c = 7. Find the measure of B.
158°
142°
38°
22°
Answers
Answer:
C
Step-by-step explanation:
Since we are given three sides and we want to find an angle, we can use the law of cosines.
The law of cosines is given by:
[tex]b^2=a^2+c^2-2ac\cos(B)[/tex]
In this case, a = 3, b = 5, and c = 7. Therefore:
[tex](5)^2=(3)^2+(7)^2-2(3)(7)\cos(B)[/tex]
Evaluate:
[tex]25=58-42\cos(B)[/tex]
Therefore:
[tex]-42\cos(B)=-33[/tex]
Dividing both sides:
[tex]\displaystyle \cos(B)=\frac{33}{42}[/tex]
And by taking the inverse cosine of both sides:
[tex]\displaystyle \angle B=\cos^{-1}\Big(\frac{33}{42}\Big)=38.2132...\approx 38^\circ[/tex]
Our answer is C.
Answer:
38°
Step-by-step explanation:
Related Questions
25 points! Please show work for brainlest answer
Answers
Answer:
x² - 10 + 2x = 2x + 90
x² - 10 + 2x - 2x = 2x - 2x + 90
x² - 10 = 90
x² - 10 + 10 = 90 + 10
x² = 100
square root them both and you get x = 10
Step-by-step explanation:
Answer:
x = 10
Step-by-step explanation:
The Picture
x^2+3x
h(x)=------------------ find h(-8)
4x+27
Answers
Answer:
h(-8)=9(-8) +27
h(-8)=72-27
h(-8)=45
Step-by-step explanation:
A bakery recorded the number of muffins and bagels it sold for a seven day period. For the data presented, what does the value of 51 summarize?
A) mean of bagels
B) mean of muffins
C) range of bagels
D) range of muffins
Answers
Answer:
Mean of bagel
Step-by-step explanation:
Working out each of the statically summaries Given in the option :
Mean of muffin :
Mean = Σx / n
n = sample size
(61 + 20 + 32 + 58 + 62 + 61 + 56) / 7
= 350 / 7
= 50
Mean of bagel :
Mean = Σx / n
n = sample size
(34 + 45 + 43 + 42 + 46 + 72 + 75) / 7
= 357 / 7
= 51
Hence, from the result obtained, we could see that the value of 51 summarizes the mean of bagel.
Please help me ASAP!!
Answers
Answer:
Option D
Step-by-step explanation:
McKenzie wants to put the soil in a box with the soil height = (10 - 2) inches
(As she plans to keep 2 inches from the top of the box empty)
Length of the box = 8 inches
Width of the box = 12 inches
Since, soil in the box will get the dimensions same as of the box but the height will be 2 inches less than the box height.
Therefore, volume of the soil = Length × Width × height
V = 8 × 12 × (10 - 2)
Option D will be the answer.
Which table correctly shows all the sample spaces for tossing a coin to get heads and rolling a number on a six-sided number cube? Coin Number cube Outcome Tails 1 Tails, 1 Tails 2 Tails, 2 Tails 3 Tails, 3 Tails 4 Tails, 4 Tails 5 Tails, 5 Tails 6 Tails, 6 Coin Number cube Outcome Heads 1 Heads, 1 Heads 2 Heads, 2 Heads 3 Heads, 3 Heads 4 Heads, 4 Heads 5 Heads, 5 Heads 6 Heads, 6 Coin Number cube Outcome Heads 1 Heads, 2 Heads 2 Heads, 4 Heads 3 Heads, 6 Tails 4 Tails, 2 Tails 5 Tails, 4 Tails 6 Tails, 6 Coin Number cube Outcome Heads 2 Heads, 1 Heads 4 Heads, 3 Heads 6 Heads, 5 Tails 2 Tails, 1 Tails 4 Tails, 3 Tails 6 Tails, 5
Answers
Answer:
I am pretty sure that it is
heads 1
heads 2
heads 3
heads 4
heads 5
heads 6
Step-by-step explanation:
because in the question it says to roll a six sided die and a coin that lands on heads so there are all the numbers on die and heads only
Answer:
I think its all head
Step-by-step explanation:
Coin Number
cube Outcome
Heads
1
Heads, 1
Heads
2
Heads, 2
Heads
3
Heads, 3
Heads
4
Heads, 4
Heads
5
Heads, 5
Heads
6
Heads, 6
HELPP I WILL BE GIVING BRAINLIEST!!:))
Answers
Volume formula is [tex]V = B \cdot h[/tex]
First find the area of the base (hexagon). The area of a hexagon can be found with the formula [tex]A = \frac{1}{2} P\cdot a[/tex] where [tex]a[/tex] is the apothem (line that's perpendicular to a side and connected to the center point) and [tex]P[/tex] is the perimeter.
We already know the length of the apothem (5.7 ft). We also have one side length already (6.58 ft), a hexagon has 6 sides, so [tex]P = 6\cdot 6.58 = 39.48[/tex] ft.
Plug these into the area formula
[tex]A = \frac{1}{2} (39.48)(5.7)[/tex]
Area of the base ([tex]B[/tex]) is 112.52 ft
Now plug into the volume formula using 15.4 ft as the height
Final answer:
[tex]V = 1732.81 ft^3[/tex]
Work out
55
% of
2900
Answers
0.55 x 2900 = 1595
solve -4 (h - 2) = 8
Answers
Answer:
h=0
Step-by-step explanation:
-4(h-2)=8
/4 /4
h-2=-2
h=0
Hey Btw I strongly reccomend you use photomath for your math classes.
Answer:
[tex] \frac{ - 4(h - 2}{ - 4} = \frac{8}{ - 4} \\ h - 2 = - 2 \\ h - 2 + 2 = - 2 + 2 \\ h = 0[/tex]
NEED NEED HELP QUICK ASAP
Answers
Answer:
1/3 of the 342 seats which would be 267 of the seats are used by the Students
Step-by-step explanation:
Triangle JKL is shown below.
K
24
L
28
Which equation should be used to find the
length of JK?
Answers
A bookstore tracked the data of the weight of their deliveries and the number of books in each box. They created a scatterplot and trend line based on the data. Which statement would be a reasonable prediction based on the scatterplot and trend line? A box with 10 books should weigh about 2 pounds. A box with 10 books should weigh about 4 pounds. A box with 10 books should weigh about 6 pounds. A box with 10 books should weigh about 12 pounds.
Answers
Answer:
b
Step-by-step explanation:
Answer:
I think its B
Step-by-step explanation:
pls tell me if im wrong D:
Solve the simultaneous equations
3x + 2y = 14
2x + 7y = 15
X =?
y =?
Answers
2x + 7y = 15 ---> equation (2)
multiply equation (1) by 7
and multiply equation (2) by -2
21x + 14y = 98 equation (1)
-4x -14y = -30 equation (2)
21x -4x = 98 -30
17x = 68
x = 4
not by substitution in any equation by x = 4
3x + 2y = 14
3(4) + 2y = 14
12 + 2y = 14
2y = 14-12
2y = 2
y = 1
so x = 4
and y = 1
Evaluate: 6q + m − m; use m = 8, and q = 3
Answers
Answer:
your answer is 18
Step-by-step explanation:
Answer:
18
Step-by-step explanation:
6(3)+8-8
=18
.......
ASAP I NEED HELP PLZ PLZ PLZ PLZ
Answers
Answer: 64 ................ :)
Step-by-step explanation:
Answer:
64cm^3
Step-by-step explanation:
The formula for volume is: V=l•w•h
So V= 8•2•4
8•2= 16
16•4= 64
hope this helps chu <3
FIND THE AREA OF THE SHAPE
Answers
Answer: I think 72 sorry if this didnt help
Step-by-step explanat
Given this expression:
29.3 x 10.8
How many decimal digits will the product have? Choose one.
1 decimal digit
2 decimal digits
3 decimal digits
Answers
Answer:
2 decimal places
Step-by-step explanation:
just simple count the number of decimal points on both sides
Mason is laying tiles on his entryway. The tiles are each 2/9 feet long, and the entryway is 7 1/2 feet long. How many tiles will Mason need to buy in order to cover the length of the entryway? Explain.
Answers
Answer:
1 2/3
Step-by-step explanation:
7 1/2x2/9
The required number of tiles will be 34 covering the length of the entryway.
What is the Multiplication operation?In mathematics, Multiplication operations perform Multiplying values on either side of the operator.
For example 4×2 = 8
We have been given that the tiles are each 2/9 feet long, and the entryway is 7 1/2 feet long.
We have to determine the number of tiles will he need to buy in order to cover the length of the entryway.
According to the given question, the required solution would be as:
So the number of tiles covering the length of the entryway will be
⇒ 7 1/2 ÷ (2/9)
⇒ 15/2 ÷ (2/9)
⇒ 15/2 / (2/9)
Reciprocal the term in the denominator
⇒ (15/2) x (9/2)
Apply the multiplication operation,
⇒ 135/4
Apply the division operation,
⇒ 34
Thus, the required number of tiles will be 34 covering the length of the entryway.
Learn more about Multiplication operations here:
brainly.com/question/25834626
#SPJ5
Use the double bar graph below to answer the following question.
What was the difference between Dallas' population in 1990 and 2000?
400,000
100,000
300,000
200,000
Answers
Answer:
the difference is 200,000
Answer:
the answer is 200,000
Step-by-step explanation:
Plsss help
I’ll mark u brainlest plssss helpp
Answers
Answer:
x = 93 degrees
Step-by-step explanation:
Answer:
x= 93°
Step-by-step explanation:
the angles are corresponding angles
this means they have the same angle measure.
the bottom one is 93° so that means the other one is 93° as well.
Yeah I need help again I suck at math it’s my least fav subject
Answers
If it’s right you, use the formula A=s^2....
so in this case just do 35^2 which would be 1225.....
btw demos is a great online calculator (just for future reference) Have a good day! :)
Consider the sequence 4,-12,36,-108... What is the 9th term in the sequence
Answers
Answer:
The 9th term in the sequence is 29
Step-by-step explanation:
can i have brainliest please
Answer:
he 9th term in the sequence is 29Step-by-step explanation:
A triangular prism is 19 yards long and has a triangular face with a base of 18 yards and a height of 12 yards. The other two sides of the triangle are each 15 yards. What is the surface area of the triangular prism?
Answers
Answer:
1128 Yard²
Step-by-step explanation:
From the question,
The surface area of a triangular prism is
A = bh+H(a+b+c)...................... Equation 1
Where a = First side of the triangular face, b = base of the triangular face, c = the other side of the triangular face, H = heigth of the prism, h = height of the triangular face
Given: a = 15 yard, b = 18 yards, c = 15 yards, h = 12 yards, H = 19 yards.
Substitute these values into equation 1
A = (18×12)+ 19(15+15+18)
A = 216+19(48)
A = 216+912
A = 1128 Yard²
Hence the surface area of the triangular prism is 1128 yard²
identify the graph of 2x^2 + 4xy + 4y^2 = 0 then find theta to the nearest degree.
Answers
Answer: 2x2 + 4xy + 4y2 = 0
2 xx + 4xy + 4yy = 0
...xx + 2xy + y*y + yy = 0
(x + y)^2 + yy = 0
if x is a constant
... 2yy + 4xy - 2xy + xx = 0
(2yy + 4xy + 2xx -2xx) - 2xy + xx = 0
2(y + x)^2 - 2xx - 2xy + xx = 0
2(y + x)^2 - xx - 2xy = 0
2(y + x)^2 - xx - 2xy +yy - yy = 0
(x + y)^2 + yy = 0
x = i*y - y
if x = r cos a
y = r sin a
cos a )^2 + cos a sina + sin a)^2 + sin a)^2 = 0
cos a sin a + sin a)^2 = -1
Step-by-step explanation:
Answer:
Ellipse; -32deg
Step-by-step explanation:
Got it right on Edge
PLEASE HELP +10 pts BUT BETTER SHOW WORK ON HOW U GOT THE ANSWER! No links. Plz.
I’ll report if u don’t answer the question I literally need help with this is no joke.
Answers
Be carful
a triangular prism has bases that are 3 inches tall and 8 inches wide the remaining two sides of each triangular base are 5 inches long, and the distance between the bases of the prism is 12 inches. What is the total surface area?
Answers
Answer:
there are 16 inches of bases
Which of these shapes are parallelograms? Choose ALL the correct answers
Answers
The two purple ones are the parallelograms
Hope this helps! ^^
Answer:
All of them are parallelograms because.....
Step-by-step explanation:
parallelograms have for sides and all of them have for sides
NVM sorry this is wrong i got the wrong word
slope of 1/2 and y-intercept is -5.
Answers
Answer:
Y= 1/2x-5
Step-by-step explanation:
A scientist used a microscope to count the number of bacterial cells in a petri dish every hour. The graph shows the data collected.
Which function most accurately represents this data, where n is the number of bacteria and t is the time elapsed, in hours?
n = 2t
n = 2^t
n = t^2
n =
Answers
EXPLANATION-
Cody drew a scale drawing of a house. In real life, the hall closet is 4 feet long. It is 2 inches long in the drawing. What scale did Cody use?
Answers
Multiply 4 by 2, that should give you the answer. Hope this helps!
Can someone please help me with math.
Answers
Answer:
d
Step-by-step explanation:
simply look between 8 and 10