Answer:
Cos 2u = 7/25
Step-by-step explanation:
Here, we want to find the value of cos2u
Using formula, we can rewrite cos 2
Mathematically;
cos 2u = 2cos^2 U - 1
Thus, we have that
cos 2u = 2(4/5)^2 - 1
cos 2u = 2(16/25) - 1
cos 2u = 32/25 - 1
cos 2u = (32-25)/25 = 7/25
13. What are three causes for water temperature variation in ocean water?
depth, latitude, and seasons
pressure, gravity, and tectonic movement
humidity, air pressure, and winds
Answer:
depth, latitude, and seasons
Step-by-step explanation:
Three causes for water temperature variation in ocean water are depth, Latitude, and season. Then the correct option is A.
What are three causes for water temperature variation in ocean water?Surface water temperature depends on latitude and season. The temperature of the surface water in the ocean changes from place to place and from season to season.
Ocean temperature depends on the amount of solar energy absorbed. For example, tropical oceans receive a lot of direct overhead sunlight for much of the year, so the water is warm.
The temperature of the surface waters varies mainly with latitude. For example, The polar seas which are found in high latitude can be as cold as -2 degrees Celsius while the Persian Gulf which is in low latitude can be as warm as 36 degrees Celsius.
Hence, the correct option is A.
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Calculate the area of the figure and show your solving steps.
Answer:Area is a measure of how much space there is inside a shape. Calculating the area of a shape or surface can be useful in everyday life – for example you may need to know how much paint to buy to cover a wall or how much grass seed you need to sow a lawn.
This page covers the essentials you need to know in order to understand and calculate the areas of common shapes including squares and rectangles, triangles and circles.
Calculating Area Using the Grid Method
When a shape is drawn on a scaled grid you can find the area by counting the number of grid squares inside the shape.In order to find an area value using the grid method, we need to know the size that a grid square represents.Count the grid squares inside the large square to find its area..
There are 16 small squares so the area of the large square is 16 square centimetres.
In mathematics we abbreviate 'square centimetres' to cm2. The 2 means ‘squared’.
Step-by-step explanation:
plz guys cmonnnnn there's gonna be more. WILL GIVE BRAINLIEST
Answer:
[tex] 6.3 \le p \le 8.1 [/tex]
The third reading must be between 6.3 and 8.1 inclusive.
Step-by-step explanation:
To find the average of three numbers, add the three numbers and divide by 3.
Let the third reading = p.
The average of the three readings is
[tex] \dfrac{7.4 + 7.9 + p}{3} [/tex]
This average must be between 7.2 and 7.8 inclusive. "Inclusive" means that the values 7.2 and 7.8 are allowed. That means the average must be greater than or equal to 7.2 and less than or equal to 7.8. We can write this as the following inequality.
[tex] 7.2 \le \dfrac{7.4 + 7.9 + p}{3} \le 7.8 [/tex]
Simplify the numerator.
[tex] 7.2 \le \dfrac{15.3 + p}{3} \le 7.8 [/tex]
Multiply the three sides by 3.
[tex] 21.6 \le 15.3 + p \le 23.4 [/tex]
Subtract 15.3 from the three sides.
[tex] 6.3 \le p \le 8.1 [/tex]
Answer: The third reading must be between 6.3 and 8.1 inclusive.
Mark had saved $15 but he then had to pay a bill that cost him $5.76 how much money does he have left
Answer:
He will have $9.24 left
Step-by-step explanation:
15- 5.76= 9.24
bentley bought a new dog toy for $10. if he paid 6% sales tax, how much money would he pay just for tax?
Answer:
$0.60
Step-by-step explanation:
Tax = price * sales tax
Tax = 10 * 0.06 = $0.60
1. Find the next three term.
3,6,12,24
Answer:
48 96 and 192
Step-by-step explanation:
you just have to multiply by two
What is the potential energy of a rock traveling at 5m/s from a height of 8 meters with a kinetic energy of 200J?
A: 5
B: 1254.4
C: 6272
D: 2.55
Answer:
i think D
Step-by-step explanation:
A turtle laid 70 eggs and 9/15 hatched how many eggs did not hatch
Answer:
6/15=28
Step-by-step explanation:
1 -9. =6/15
1 15
9/15×70=42
70-42=28
Answer:
6/15=28
Step-by-step explanation:
find the measure of each missing angle?
angle a=
angle b=
angle c=
Answer:
angle a = 70
angle b = 45
angle c = 65
Step-by-step explanation:
Examine (A), (B), and (C) and find the best answer.
(A) 3/5
(B) 8/9
(C) 5/7. a) (A) is greater than (B) and less than (C).
b) (A), (B), and (C) are equal.
c) (B) is greater than both (A) and (C).
d) (C) is greater than (B) and less than (A).
Answer:
its A
Step-by-step explanation:
Answer:
[tex] \boxed{option \: \boxed{(C)} \: is \: correct.}[/tex]
Step-by-step explanation:
[tex] \boxed{ \boxed{\frac{3}{5} = 0.6 } \: \boxed{\frac{8}{9} = 0.89} \: \boxed{ \frac{5}{7} =0.71 }} \\ hence \to \\(B) \: is \: greater \: than \: both \: (A) \: and \: (C).[/tex]
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Help asap if you want brainliest
Martin is ordering DVDs online. Each DVD is priced at $8.50. The website also charges a flat fee of $5.00 for shipping and handling for any size order. If Martin decides to spend no more than $56, how many DVDs can he buy?
Answer:
4 DVD's
Step-by-step explanation:
8.50+5.00=13.5x4=54, so he spent $54, and got $2 in change
How is the product of 2 and –5 shown using integer tiles? 2 positive tiles and 5 negative tiles. 2 negative tiles and 5 positive tiles. 5 negative tiles and 5 negative tiles. 5 positive tiles and 5 positive tiles.
Answer:
5 negative tiles and 5 negative tiles
Step-by-step explanation:
When multiplying a positive number by a negative number, the product is always negative.
This can be visualized using integer tiles:
Answer:
So lets say the negative tiles are red and the poiitive tiles are yellow.
Now for the first one
2*-5
That would be shown with two groups of fives with red tiles
Now we know its -10 be used if you count it up, its 10 negatives red tiles
-2*5
So 5 groups of 2 red tiles and if you count it all up, you’ll get -10
-5*-5
So 5 groups of -5 tiles
You’d get -25
But thats not the answer
I have no clue to show this but i guess you just have to know that negative *negative is positive so just switch the signs
25
5*5
Just make 5 groups of 5 yellow tiles and count them up, you’ll get 25
We are standing on the top of a 1680 ft tall building and throw a small object upwards. At every second, we measure the distance of the object from the ground. Exactly seconds after we threw the object, it’s height, (measured in feet) is
ℎ= -16^2 + 256 + 1680
a.) Find ℎ when = 3.
b.) How much does the object travel during the two seconds between 5 seconds and 7 seconds?
c.) How long does it take for the object to reach a height of 2640 ft?
d.) How long does it take for the object to hit the ground?
Answer:
a) The height of the small object 3 seconds after being launched is 2304 feet.
b) The small object ascends 128 feet between 5 seconds and 7 seconds.
c) The object will take 6 and 10 seconds after launch to reach a height of 2640 feet.
d) The object will take 21 seconds to hit the ground.
Step-by-step explanation:
The correct formula for the height of the small object is:
[tex]h(t) = -16\cdot t^{2}+256\cdot t+1680[/tex] (1)
Where:
[tex]h[/tex] - Height above the ground, measured in feet.
[tex]t[/tex] - Time, measured in seconds.
a) The height of the small object at given time is found by evaluating the function:
[tex]h(3\,s)= -16\cdot (3\,s)^{2}+256\cdot (3\,s)+1680[/tex]
[tex]h(3\,s) = 2304\,ft[/tex]
The height of the small object 3 seconds after being launched is 2304 feet.
b) First, we evaluate the function at [tex]t = 5\,s[/tex] and [tex]t = 7\,s[/tex]:
[tex]h(5\,s)= -16\cdot (5\,s)^{2}+256\cdot (5\,s)+1680[/tex]
[tex]h(5\,s) = 2560\,s[/tex]
[tex]h(7\,s)= -16\cdot (7\,s)^{2}+256\cdot (7\,s)+1680[/tex]
[tex]h(7\,s) = 2688\,s[/tex]
We notice that the small object ascends in the given interval.
[tex]\Delta h = h(7\,s)-h(5\,s)[/tex]
[tex]\Delta h = 128\,ft[/tex]
The small object ascends 128 feet between 5 seconds and 7 seconds.
c) If we know that [tex]h = 2640\,ft[/tex], then (1) is reduced into this second-order polynomial:
[tex]-16\cdot t^{2}+256\cdot t-960=0[/tex] (2)
All roots of the resulting equation come from the Quadratic Formula:
[tex]t_{1} = 10\,s[/tex] and [tex]t_{2}= 6\,s[/tex]
The object will take 6 and 10 seconds after launch to reach a height of 2640 feet.
d) If we know that [tex]h = 0\,ft[/tex], then (1) is reduced into this second-order polynomial:
[tex]-16\cdot t^{2}+256\cdot t +1680 = 0[/tex] (3)
All roots of the resulting equation come from the Quadratic Formula:
[tex]t_{1} = 21\,s[/tex] and [tex]t_{2} = -5\,s[/tex]
Just the first root offers a solution that is physically reasonable.
The object will take 21 seconds to hit the ground.
The ratio of girls to boys in a a swimming club was 2 : 4. There were 14 girls. How many total members were there in the club?
Answer:
42 people
Step-by-step explanation:
If the girls to boys 2:4, and there are 14 that means it is times 7. 4 times 7 = 28.
14 + 28 is 42.
what is the answer for -10x-12=5x+18
x = 2
5x + 10 x = 18 + 12
15x = 30
x = 2
Answer:
x=-2
Step-by-step explanation:
In the figure below, lines m and n are parallel
Answer:
A-83 degrees
Step-by-step explanation:
n intersects the middle line, making m5 and m6 supplementary, meaning they add up to 180 degrees.
180-97=m5
180-97=83
Are the triangles below similar?
Answer:
I think it's C
Triangle ABC is rotated 180 degrees around point B and then dilated to form triangle DBE as shown. Which postulate or theorem establishes that the triangles are similar?
Answer:
Step-by-step explanation:
SAS Similarity
the value of k is ___.
Answer:
There is no k in that graph
Step-by-step explanation:
Type the correct answer in each box. Use numerals instead of words.
Laurel wants to build a fence around her square garden. Each side measures 50 feet. She also wants to fence in 3 square rose beds next to her garden. Each side of a bed measures 10.5 feet. How many feet of fencing does Laurel need in all?
Laurel needs____ feet of fencing.
Answer:
326
Step-by-step explanation:
The fences required=
50×4←Sqare garden + (10.5×4)×3←three rose bed
=326feet
Plz help I’m getting timed
Answer:
The first one on the left
Step-by-step explanation:
Answer:
i think its the first one
Step-by-step explanation:
A pote that is 3.5 m tall casts a shadow that is 1.08 m long same time, a nearby building casts a shadow that is 35.5 m long How tall is the building Round your answer to the nearest
Answer:
I ain't never seen 2 pretty bestfriends
Step-by-step explanation:
hhhhhhellllpppp pwease
Answer:
b
Step-by-step explanation:
I hope this helps you out!
Which statement is true for all functions f(x)?
O The graph of f(kx) is the graph of f(x) shifted left or right by|k| units.
O The graph of f(x) + k is the graph of f(x) shifted left or right by|k|units.
O The graph of -f(x) is the graph of f(x) reflected over the y-axis.
O The graph of –f(x) is the graph of f(x) reflected over the x-axis.
Answer:I think it’s t last one
Step-by-step explanation:
The first three terms of a sequence are given. Round to the nearest thousandth (if necessary). Find the 37th term in 352, 345, 338...
A. 331
B. 324
C. 100
D. 282
Answer:
C.100
Step-by-step explanation:
arithmetric progression formula
a+(n-1)(d)
345-352=338-345
-7=-7
d=-7
a=352 d=-7
37th term=352 + (37-1)(-7)
=352 + (36)(-7)
=352 + (-252)
=100
Answer:
Step-by-step explanation:
331
A factory is currently producing 50 Teslas everday. How many Teslas will be produced each day if production is to be increased to 130%?
Answer:
65
Step-by-step explanation:
If 100% they probably produce exact 50 of it everyday
so we need to find 30%
30/100 × 50 = 15
100% + 30% = 130%
50 + 15 = 65
How to solve an algebraic expression by putting values of unknown
Answer:
Step-by-step explanation:
Algebraic expressions tend to have atleast one unknown variable in it. In order to solve the expression we need to assign a fixed value to that variable or isolate it if the expression is equal to another value. For example, in the following expression we have the variable x, if we give it a value of 5 we simply solve like a regular expression...
5x + 3
5(5) + 3
25 + 3
28
Therefore, if we swap the variable x for the value of 5 we would get a value of 28 in this algebraic expression.
Two types of sandwiches were made for a tea party. 55% of the sandwiches were chees e and the rest were chicken sandwiches. If there were 252 chicken sandwiches, how many sandwiches were made altogether?
Answer:
560 sandwiches were made
Step-by-step explanation:
set up a porportion.
45/252=55/x
45x=13860
x=308 cheese sandwichs
308+252=560
Answer:
560 sandwiches were made
Step-by-step explanation:
marke me brainlist
i need help! asap please
Answer:
-1/1
Step-by-step explanation:
it's negative 1 over one because the graph is constantly going down but still to the right side and the line is touching every corner of the boxes
(2^3 × 2)^2 pls explain how you got it....the answer is 2^8 but I want to know how we get that.
Step-by-step explanation:
(2³ × 2¹)²
(2⁶ × 2²)
for indices , × become +, plus
÷ become -, minus
so
2⁶+²
2⁸
