Answer:
20 days
Step-by-step explanation:
Time to clean field for 6 boys=15days
Time to clean field for 1 boy=15/6 days
Time to clean field for 8 boys=15/6 × 8 days
Time to clean field for 8 boys=120/6 days
Answer=20 days
Note:if you need to ask any question please let me know.
Solve for X when 7cos2x = 5
Answer: x = 22.21
Step-by-step explanation:
Given
7 · cos (2x) = 5
Divide 7 on both sides
7 · cos (2x) / 7 = 5 / 7
cos (2x) = 5/7
Divide cosine on both sides (meaning applying cos⁻¹ to the right-hand side)
2x = cos⁻¹ (5/7)
Divide 2 on both sides
2x / 2 = [cos⁻¹ (5/7)] / 2
[tex]\boxed {x=22.21}[/tex] (Rounded to the hundredth place)
Hope this helps!! :)
Please let me know if you have any questions
Suppose u and v are orthogonal vectors with ||u|| =5 ||u||= 1/2 ||v||, find ||u+v||.
help pleas I will give you 15 points
Answer: 5*sqrt(5)
This is the same as sqrt(125).
It approximates to roughly 11.1803
=========================================================
Explanation:
Vector u is 5 units long as indicated by the notation ||u|| = 5. Some math books would say |u| = 5, and it's the same thing. The double bars are probably more fitting because it helps emphasize we're looking for the length of a vector and we're not using absolute value bars.
The second equation ||u|| = (1/2)*||v|| can be rewritten into ||v|| = 2*||u|| telling us that vector v is twice as long compared to vector u. Since vector u is 5 units long, that must mean vector v is 10 units long.
vector u = 5 units longvector v = 10 units longThe two vectors are orthogonal, i.e. they are perpendicular. The vector u+v represents the diagonal of the rectangle as shown below in the attached image. Vector u is horizontal, v is vertical, and u+v is the diagonal. Technically we don't know where vector u is pointed along a compass (it may or may not be pointing directly east), but I find it's easier to have it set up like this. The answer will be the same regardless of where vector u is pointed. Rotations don't affect vector lengths.
We can see that vector u+v effectively breaks down component-wise into the horizontal component u and vertical component v (think of them as x and y components respectively).
Furthermore, note how there are two right triangles that form when we draw in the diagonal of the rectangle.
To find the length of vector u+v, we apply the pythagorean theorem.
a^2+b^2 = c^2
( ||u|| )^2 + ( ||v|| )^2 = ( ||u+v|| )^2
( 5 )^2 + ( 10 )^2 = x^2
25 + 100 = x^2
125 = x^2
x^2 = 125
x = sqrt(125)
x = sqrt(25*5)
x = sqrt(25)*sqrt(5)
x = 5*sqrt(5) is the length of vector u+v
In other words, ||u+v|| = 5*sqrt(5)
Keep in mind that this trick using the pythagorean theorem only works when vectors u and v are orthogonal. The process to find ||u+v|| for non-orthogonal vectors u,v is a bit more complicated.
Find the perimeter of A(1, 1), B(7, 1), and C(1, 9).
Answer:
24units.
Step-by-step explanation:
steps are in picture.
If you have any question about it please ask.
Hans, a clothing designer, has $38 to buy zippers. Each zipper cost $2.50. The equation y=2.50x represents the relationship between the number of zippers and the cost. How many zippers can Hans buy?
X represents?—————
Y represents?—————
K= —————
Solution: (——-,——-)
The solution does or does not make sense in the situation because—————
Hans can buy ——— zippers
Answer:
X = Amount of zippers she can buy
Y = Total cost
K = each zipper cost, $2.50
Solution: Hans can buy 15 zippers
Step-by-step explanation:
38 = 2.50x
x = 15.2 = 15 zippers
Simplify please explain step by step
Answer:
-4.4
Step-by-step explanation:
=3-[8-(7-6.4)]
=-4.4
The midpoint of AB is M(3, 1). If the coordinates of A are (1, -1), what are the
coordinates of B?
Answer:
(5,3)
Step-by-step explanation:
8.
The
square of a number is always greater than the number.
Answer:
The above given statement is true
Pls help I’m having trouble
Answer:
1161 ft
Step-by-step explanation:
36 ft with the triangles, 900 ft with the squares, 225 ft for the bottom square, so total is 1161 ft.
-99>5-8(m+6)
need help
Answer:
m > 7
Step-by-step explanation:
[tex] - 99 > 5 - 8(m + 6)[/tex]
[tex] - 8(m + 6) = - 8m - 8 \times 6[/tex]
[tex] = - 8m - 48[/tex]
[tex] - 99 > 5 - 8m - 48[/tex]
[tex]5 - 48 = - (48 - 5) = - 43[/tex]
[tex] - 99 > - 43 - 8m[/tex]
[tex] - 99 + 8m > - 43[/tex]
[tex]8m > - 43 + 99[/tex]
[tex]8m > 56[/tex]
[tex] = m > 7[/tex]
WILL GIVE BRAINLIST!!
Robin draws a tile from a bag that contains 4 white tiles, 5 green tiles and 9 yellow tiles. She then draws a second tile without replacing the first. What is the probability that both tiles Robin draws are white?
WILL ONLY GIVE BRAINLIEST IF EXPLAINED PROPERLY
Answer:
2/51
Step-by-step explanation:
there are 4 white tiles and 18 total tiles in the bag, so your ratio is 4 out of 18 and 2/9 when simplified. When Robin draws out the first one, if it is white, then because he keep that one out, there are only 3 white tiles left and 17 total tiles left, so 3/17 is his chance of drawing a white the second time. you multiply 2/9 and 3/17 together because there is a chance for him to draw the white tile the first time and a chance to draw a white again the second time, so it is reasonable for the chance to be really small. 2/9 x 3/17=2/51.
5(x + 3) - 2 = 2 + 5x + 9
Answer:
There is no solution
Step-by-step explanation:
[tex]5(x + 3) - 2 = 2 + 5x + 9[/tex]
[tex]5x+15-2-2-5x-9=0\\15-13=0\\2=0[/tex]
There is no solution
because 2=0 is not possible.
→5(x + 3) - 2 = 2 + 5x + 9
→5x+15-2 = 11+5x
→5x-5x = 11-13
→x = -2
~
1.4m breadth and 70cm length for this rectangle find the ratio of the longer side to the shorter side in its simplest form.
Answer:
2 : 1
Step-by-step explanation:
→ Convert 1.4 m into cm
1.4 × 100 = 140 cm
→ Find the larger number between 140 and 70
140
→ Put into ratio format
140 : 70
→ Simplify
2 : 1
a. If the average North Korean farmer produces 1,500 pounds of food per year, what is the opportunity cost, In pounds of food, of North
Korea's army?
______ pounds of food per year
b. If a person needs at least 500 pounds of food per year to survive, how many people could have been fed with the forgone food output?
_____ people
Answer:
1,920,000,000 pounds of food per year and 3,840,000 people.
Step-by-step explanation:
1,280,000 active military members could have been farmers that produced 1,500 pounds of food per year. (1,280,000 farmers x 1,500 pounds of food = 1,920,000,000).
1,920,000,000 divided by 500 pounds of food per person is 3,840,000.
Plz help will give brainliest!!
I think it is six thats what i got
Answer:
6 units²
Step-by-step explanation:
Since the triangle is reflected they should have the same length sides (triangles are congruent) so you would use the length they give you for side AC in the first triangle and the length of the side AB in the second triangle to determine the area
Area= ½ base × perpendicular height
=½4 ×3
=6 units²
express 13/50 as a percentage
Answer:
26%
Step-by-step explanation:
How can we turn a fraction into a percentage well if 1.00 is 100% and 0.90 is 90% we can see that we can easily convert between decimal and percents. The fraction 13/50 is the same thing as 13 divided by 50 which is 0.26. So our answer is 26%
Answer: 26%
Step-by-step explanation:
13/50 = 26/100 =26%
9 1/10 - 4 3/4
fraction need help now pls do not lie just for points will be reported
Answer:
4.35 or 87/20
Step-by-step explanation:
try desmos scientific calculator to help with other question.
If f(x) = 24 +5, then what is the remainder when f(x) is divided by 2 + 2?
Answer:
The question is incorrect as it lacks the "x" component. Function f(x) cannot be stated without the x, elseways it couldn't be called "f(x)"
What is the volume of a cone with a height of 27 cm and a radius of 13 cm? Round your answer to the nearest tenth
Answer:
[tex]\huge\boxed{\sf V = 4778.4\ cm\³}[/tex]
Step-by-step explanation:
Given:
Height = 27 cm
Radius = 13 cm
Formula:
[tex]Volume \ of \ cone \ V = \frac{1}{3} \pi r^2h[/tex]
Solution:
V = 1/3 (3.14)(13)²(27)
V = (3.14)(169)(9)
V = 4778.4 cm³
[tex]\rule[225]{225}{2}[/tex]
Hope this helped!
~AH1807Peace!a flock of parrots was sitting a tree. five more joined them then half the total flew away leaving seven parrots how many were in the flock?
Answer:
9
Step-by-step explanation:
9+5=14/2=7
2 dived (8+3x3-4^2) What is the answer
Answer:
2
Step By Step Explanation:
= 2*(8+3*3-4^2)
= 2*(8+3*3-16)
= 2*(8+9-16)
= 2*(17-16)
= 2*(1)
= 2*1
= 2
Answer: 2
Step-by-step explanation:
2/(8+9-16)
2/1 = 2
help find x for a,b,c and d i will rate thank u
(4x – 5)(7 – 2x) – (2x + 2)(2 – 4x)= -1
Answer: x= 19/21.
Step-by-step explanation:
We can expand the expression to:
28x - 8x^2 - 35 + 10x -4x + 8x^2 - 4 + 8x = -1
We can then cancel the - 8x^2 and the + 8x^2 and simplify further by adding like terms:
38x - 35 + 4x -4 = -1 --> 42x - 39 = -1
We can then add 39 on both sides:
42x = 38
We can then divide both sides by the GCF (greatest common factor), 2:
21x = 19
We divide both sides by 21:
x = 19/21
According to the table. what is the ratio of pattern 2 to pattern 1?
A) 1/4
B) 1/2
C) 2/1
D) 1
PLS ANSWER QUICK
Answer:
Srry but there is no table.
4z - 15 = 4z + 11
How would this one work?
In your own words, what does supplementary mean?
Answer:
added or serving as a supplement.
On+monday,+hakim+stocked+up+on+bottled+water+for+the+trip.+On+tuesday,+he+purchased+five+more+bottles+to+add+to+his+collection.+On+wednesday,+half+of+his+entire+collection+remained+and+only+had+7+left.+How+many+did+he+have+on+Monday
Answer:
the answer for this question is 2
First person to answer this correctly gets Branilist!
Answer:
9. -1
First combine the like terms (-5x and 3x), the move -9x to the other side. That equals 7x. Then move -16 (turn positive) and add it to -23, that equals -7. Divide both sides by 7.
10. 9
Add 1 to -24. Then move -23(turn positive) to the other side. Combine with -5 and you get 18. Then move 6r and subtract it from 8r. Divide both sides by 2.
11. 11
Subtract 7a from 9a= 2a. then add 3a and 2a and move 5a to the other side. Add -5a and 2a = -3a. Divide both sides by -3.
12. 5
Combine the like terms. Move -25 and turn it positive and then add it to 20= 45. Turn -2m positive and add it to 7m. Divide both sides by 9.
13. -5
Use the distributive property on both sides. Move 2k and subtract it from 4k= 2k. Move -8 and add it to -18= -10. Divide both sides by 2.
14. -2
Use the distributive property. Move -5n and add it to -6m= -m. Move 18 and subtract it from 20= 2. Divide both sides by -1.
15. -3
Use the distributive property and combine like terms. Move 4p to the other side and subtract from -7p= -11p. Change the sign of 16 and add to 17= 33. Divide both sides by -11.
16. -13
Use the distributive property (pay attention to signs) and combine the like terms. Move -8v, turn positive, and add to -6v= 2v. Move 14, turn negative, and combine with -12= -26. Divide both sides by 2.
Find a.
Round to the nearest tenth:
а
10 cm
150°
12°
a = [? ]cm
Law of Sines: sin A
sin B
11
sin C
sin C
С
Answer:
a= 24 cm
Step-by-step explanation:
[tex] \frac{ \sin(150) }{a} = \frac{ \sin(12) }{10} \\ a = 24[/tex]
I hope I helped you^_^
Which table represents a linear function
Answer: Top right.
Step-by-step explanation:
After plotting the points on a graph, you will see that the points create a negative linear function.
cot^4+ cot^2= cosec^4 - cosec^2
please prove the identitiy
Step-by-step explanation:
steps are in the picture above.
if you need to ask a question let me know.