Answers
Answer:
C
Step-by-step explanation:
sinθ=[tex]\frac{2}{5}[/tex]
θ=sin⁻¹ ( [tex]\frac{2}{5}[/tex] )
θ=23.57817848
2θ=47.15635696
sin2θ=sin(47.15635696)=0.7332121112°≈ ((4[tex]\sqrt{21}[/tex])/25)
Related Questions
Mark wants to continue using whole liters of paint and thinks he can create a mixture of green paint the is 38 liters. Evaluate Mark's thinking using mathematical reasoning.
The ratio from blue to yellow paint is 2:3
I need helpppppp ASAP
Answers
Answer: It's not possible to create 38 liters of green paint with whole liters of blue and yellow paint.
======================================================
Explanation:
The ratio of blue to yellow is 2:3. We have 2 parts blue and 3 parts yellow.
Multiply both parts by x to get 2x:3x
We have 2x parts of blue paint, and 3x parts of yellow paint.
x is some positive whole number.
In total, we have 2x+3x = 5x liters of paint. Set this equal to 38 and solve for x to get
5x = 38
x = 38/5
x = 7.6
We don't get a whole number, which contradicts how we set up x earlier. This must mean that Mark must use a fractional liters, instead of whole liters.
-------------------------
Here's another way to look at it:
Lets say he uses 2 liters of blue and 3 liters of yellow. This mixes to 2+3 = 5 liters of green.
Now let's say he uses 4 liters of blue and 6 of yellow. I multiplied both parts by 2. This mixes to 4+6 = 10 liters of green.
We continue this process to get the following
6 liters of blue + 9 liters of yellow = 15 liters of green8 liters of blue + 12 liters of yellow = 20 liters of green10 liters of blue + 15 liters of yellow = 25 liters of green12 liters of blue + 18 liters of yellow = 30 liters of green14 liters of blue + 21 liters of yellow = 35 liters of green16 liters of blue + 24 liters of yellow = 40 liters of greenAs you can see, we don't land on 38 liters of green. We can get to 35 liters or 40 liters, but not 38. Each of the amounts of green are a multiple of 5.
This is confirmation that Mark will have to use some fractional amount of liters of blue and yellow paint.
Tim’s age is nine more than his sister, Jill. Twice his age added to twice Jill’s age is 330.
Answers
Answer:
jill age is 78 and tim's age is 87
Step-by-step explanation:
let jill age be x then, tim's age is 9+x
by the question,
2(9+x) + 2x = 330
or,18 + 2x + 2x = 330
or,4x = 330-18
or, x = 312÷4
x = 78
9+x= 9+78=87
I PROMISE TO MARK BRAINLIESTTTTT
Answers
Answer:
D!
Step-by-step explanation:
HELP!!!! BRAINIEST ANSWER + POINTS!!! PLEASE BE SERIOUS (I NEED ALL 5 POINTS + EXPLANATION)
Answers
Answer:
slope=3
y-intercept=-1
Step-by-step explanation:
5 Rectangles and 2/5 of the Rectangles Will Be Purple How Many Purple Rectangles Will She Need To Make 3 Scarfs?
Answers
Answer: 6
Step-by-step explanation:
Here's the complete question:
Olivia is making scarves. each scarf will have 5 rectangles, and 2/5 of the rectangles will be purple. how many purple rectangles does she need for 3 scarves.
Since each scarf have 5 rectangles, and 2/5 of the rectangles will be purple. The number of purple needed for each scarf will be:
= 2/5 × 5 = 2 purple
Therefore, the number of purple rectangles she need for 3 scarfs will be:
= 2 × 3
= 6
In a class of 40 students, 26 are girls and 14 are boys. What is the ratio of girls to the total number of students?
Answers
Answer:
13:20
Step-by-step explanation:
no. of girls=26
total no. of students =40
ratio of girls to total no. of students=26:40
which means, the ratio is 13:20
PLS someone help me find the slope it’s my last question
Answers
slope is 1
slope formula: y2-y1/x2-x1
4-3/0-(-1)
can you please help me and explain how to do both of these problems, I don't understand
Answers
A body falls from rest with an acceleration of 10m/s square. what is the velocity after 5s?How far has it fallen by them.
Answers
Answer:
The velocity after 5s s is 20
A line passes through the points (8, 8) and (4, 0). What is its equation in slope-intercept form?
Answers
Explanation: (8,8) 8-4 and 8-0
- (4,0)- 4 8
- you take the 8 as the numerator and 4 and the denominator and then divide 8 by 4 to=2 which is your slope
- you pick 1 set of points (I chose (8,8) to finish the problem)
8(y-intercept)= 2(slope) • 8(x-intercept) +b
8= 16+b
-16 -16 (subtract 16 from both sides)
-8 (8-16) =b {b=-8)
-now you put together your equation,
which leaves you with { y=2(x) - 8}
^ ^
your slope your B value
Can I get some help with this is the Last question
Answers
Answer:
x = 11
Step-by-step explanation:
Here, we want to get the value of x
Let’s start by looking at the point U
Now, we can see angles on a straight line at that point
Mathematically, angles on a straight line are supplementary
What this mean is that they add up to 180
Now, the value of the angle that falls into the triangle on that straight line will be;
180-(11x + 12)
Now, we have all the angles of the triangle
Mathematically, the sum of all is 180 as the a sum of the angles of a triangle is 180
5x + 10 + 58 + 180-(11x+2 )= 180
5x + 10 + 58 -11x-2 = 0
-6x+ 66 = 0
6x = 66
x = 66/6
x = 11
Which of the following is equivalent to 7^-2?
Answers
Answer:
C
Step-by-step explanation:
Answer:
C. [tex]\frac{1}{49}[/tex]
Step-by-step explanation:
When one puts a number to a negative exponent, such as;
[tex]a^{-b}[/tex]
One is essentially doing;
[tex]\frac{1}{a^{b}}[/tex]
Applying that knowledge;
[tex]7^{-2} \\= \frac{1}{7^{2}}\\= \frac{1}{49}[/tex]
A tree casts a shadow that is 7 feet long. A person nearby casts a shadow that is 3.5 feet long. The person is
5 feet tall. What is the height of the tree?
Answers
Pedro ordered a 6 footlong sub sandwich and plans to share it with his friends. If each portion is divided evenly in 3/5 of a foot, how many friends will Pedro share his sandwich with?
Answers
Answer:
10
Step-by-step explanation:
You would divide 6 feet by 3/5 of a foot would would be .6 so 6/.6 would be 10What is 0.82 as a fraction in simplest form?
(I also need the work if not its ok!)
Answers
Answer:
f 41/50
Step-by-step explanation:
I need some help I rlly appreciate it!!!!
Answers
I WILL GIVE YOU BRAINLY PLSS
Evaluate m( m + n) – n, use m = 5 and n = -3
A. 7
B. 13
C. 43
D. 37
PLSS SHOW YOUR WORK PLSS
Answers
Answer:
B. 13
Step-by-step explanation:
[tex]m(m + n) - n[/tex]
[tex]m = 5 \\ n = - 3[/tex]
Substitute m = 5 and n = - 3 in the expression.
[tex]5(5 + ( - 3)) - ( - 3) \\ 5(5 - 3) + 3 \\ 5(2) + 3 \\ 10 + 3 \\ 13[/tex]
Remind that negative multiply negative must equal positive.
Distribute 5
25+(-15)-(-3)
The minus (-3) turns into a positive so you get +3 and you add it all together and get 13 :)
10. Keith has 7.8 ounces of tuna salad. If
he makes 3 sandwiches with an equal
amount of tuna on each, how much tuna
does he put on each one?
Answers
Answer:2.6 ounces per sandwich
Step-by-step explanation: 7.8/3= 2.6
HELPPPPPPPPPPPPPPPPPPPPPPPP
Which of the following expressions is a common factor when the expressions x2 – 9 and x2 – 5x + 6 are factored?
A.
x + 3
B.
x2
C.
x – 3
D.
x – 2
Answers
Tell whether the triangle is right or not
Answers
Answer: Solved below...
Answer: Yes, that is a right triangle.
Step-by-step explanation:
To tell whether this is a right triangle or not you use a^2 + b^2= c^2
c is the hypotenuse the hypotenuse is the longest side of a right triangle, opposite the right angle. A and B can be either of the triangles sides.
To get this answer: 80^2+39^2 = 89^2
6400 + 1521 = 7921
7921=7921
Since they are the same this IS a right triangle. Here is a little help for if the a question asks if you have a right acute or obtuse. To tell if you have an acute triangle the sign will be a greater than sign for ex) 180 > 169. If you have a obtuse triangle the sign would be a less than sign for ex) 120 < 200.
Here is a problem like that if you do not understand:
6^2 +12^2 = 13^2 ( remember c is the hypotenuse)
36+144= 169
180 > 169
Have a nice day!
The sum of the digits of a given two digits the new numbers is 5 .if the digits are reversed, the new number is reduced by 27 . find the given number
Answers
Answer:. The numbers are 41 and 14
Step-by-step explanation: X and Y represent the digits. In the Tens place, the digit has 10× its base value. Therefore we can set up equations to model the information given:
10x+y = 10y + x +27
X + Y = 5
y =5-x rewritten to substitute for y
10x + 5-x = 10(5-x)+x +27
Distribute and then combine like terms:
9x +5 = 50 - 9x +27
Add 9x to both sides; subtract 5 from both sides.
9x +9x = 50+27-5
18x = 72 Combine like terms. Then divide both sides to solve for x.
x = 4
4+y=5 Substitute 4 for x; solve for y.
y=1
Substitute values of x and Y into the original equation and check.
40 +1 = 10 +4 + 27
41 = 14+ 27
True! 41=41
The numbers are 41 and 14.
The three angles of a triangle measure x+37, 90, and x+67. Find the measurement of the smallest angle in degrees.
Please help!!!
Answers
Answer:
The first angle is the smallest
Step-by-step explanation:
Step one:
given data
Angle 1= x+37
Angle 2= 90
angle 3= x+67
We know that the sum of angle in a triangle is 180
so
x+3+90+x+67= 180
collect like terms
2x+160= 180
2x=180-160
2x= 20
divide both sides by 2
x= 10
Step two:
so
Angle 1= 10+37= 47 °
Angle 2= 90= 90
angle 3= 10+67= 77 °
Find the product.
-0.3(4.1) =
Answers
Answer:
-1.23
Step-by-step explanation:
-0.3 x 4.1 = -1.23.
A negative number times a positive number equals a negative number.
Fin in the table to convert the units of measure from milliliters to liters or liters to milliliters.
Milliliters. Liters
1
9
1,000
350
Answers
1 millilitre = 0.001 litre
1 litre = 1000 millilitres
9 millilitres = 0.009
9 litres = 9000 millilitres
1,000 millilitres = 1 litre
1,000 litres = 1e+6
350 millilitres = 0.35 litres
350 litres = 350000 millilitres
Your middle school is having a carnival. Admission into the carnival is $8, and each game inside the carnival costs $0.50.
Part A: Which inequality represents the possible number of games, g, that can be played with $20?
A. 8g+0.50≤20
B. 8g+0.50≥20
C. 0.50g+8≤20
D. 0.50g+8≥20
Answers
function or not a function? justify your answer
domain:
range:
(please help!!! for both please!!!)
Answers
Answer:
function
Step-by-step explanation:
I got that answer correct on ed2020
HELP PLEASEE PLEASEE HELP ): ?
Answers
Answer:
They pass through origin
Step-by-step explanation:
Hope maka help
In quadrilateral PQRS, the exterior angle at Q measures 155 and PS = QR. What measure of ∠PSR would confirm that PQRS is a parallelogram?
Answers
Answer:
The measure confirming that PQRS would be 25
Step-by-step explanation:
It's easier if you draw it down.
1. We need to make this shape a parallelogram and the way we will do that is by making angle Q and angle S the same, because in parallelograms those opposite angles are required to be the same.
\
155 \
P \ -------------------------\ Q
\ 25 \
\ \ so that's your shape
S \______________\ R
2.We were given that the exterior angle of Q measures 155, and since exterior and interior angles combined make 180, then we can assume that the interior angle of Q is 25.
3. As mentioned before, in a parallelogram, opposite angles are the same and therefore PSR (which is just asking for the middle letter, S) is equal to 25 because Q is also 25.
ILL MARK U BRAINLIEST
At Kroger, milk costs $3.27 per gallon. Which equation best represents y, the total cost of x gallons of milk?
a. x = 3.27 + y
b. y = 3.27 + x
c. y = 3.27x
d. x = 3.27y
Answers
Answer:
C y=3.27x
Step-by-step explanation:
total cost = £3.27 times by the gallons
Step-by-step explanation:
B its B I had the same work and its B
This is correct right?
Answers
Answer:
Yes, it is not a diameter
Step-by-step explanation:
It's going through the circle (sphere) which makes it a diameter
I and D are not going straight through the middle