Answers
Your question has been heard loud and clear.
a)
Initial velocity , U=50km/h = 250/18 m/s
Final velocity , V = 0 (this is because the car finally comes to rest)
From 3rd equation of motion , V^2-U^2=2AS.
Now , for a car that goes 50km/h , it has been proven that miniumum brake distance is 6 metres.
so , S = 6 metres.
Using this , we can find the distance stopped by car , and then we can find time.
0-(250/18)^2=2*A*6
0= 2*A*6+(250/18)^2
0 = -12A + 192.90 ( minus sign because car is deccelerating)
So , A = 16.07 m/s^2
V^2-U^2 = 2AS
0 - 192.90 = 2* 16.07*S
So , S (distance) = 24 metres.
Now , we know time = distance / speed
so , time = 24 / 253 = 0.094 seconds
Thank you
Related Questions
i dont unsterstand irrational numbers
Answers
An irrational number cannot be expressed as a ratio between two numbers and it cannot be written as a simple fraction because there is not a finite number of numbers when written as a decimal. Instead, the numbers in the decimal would go on forever, without repeating.
Answer:
Irrational number does not terminate and do not repeat. I hope this can make you understand what does irrational number is. Hope it helps you
Step-by-step explanation:
A square image of an object on a video game has an initial side length of 25 pixels. To make the object appear closer, the side length of the square is increased by 10 pixels per second. This length change is represented by the function s(t) = 25 + 10t, where t is time in seconds. If the area of the square is A(s) = sa, find the formula for the area as a function of time, and then determine A(s(3)). A(t) equals +2+ t + 625 The area of the square image after 3 seconds is square pixels.
Answers
Answer: A(t) = 100t^2 + 500t + 625
3,025 square pixels
Step-by-step explanation:
A function assigns the values. The area of the square image after 3 seconds is 3,025 sq. pixels.
What is a Function?A function assigns the value of each element of one set to the other specific element of another set.
A.) The area of the video game will be,
A(s) = [s(t)]²
A(s) = (25+10t)²
A(s) = 625 + 100t² + 500t
A(s) = 100t² + 500t +625
B.) The value of A(s(3)) will be,
A(s(t)) = 100(25+10t)² + 500(25+10t) + 625
A(s(t)) = 10,000t² + 50,000t + 62,500 + 12,500 + 5,000t + 625
A(s(t)) = 10,000t² + 55,000t + 75,625
A(s(3)) = 10,000(3)² + 55,000(3) + 75,625
A(s(3)) = 270,000 + 165,000 + 75,625
A(s(3)) = 510,625
The area of the square image after 3 seconds is,
A(s) = 100t² + 500t +625
A(3) = 100(3)² + 500(3) +625
A(3) = 900 + 1500 +625
A(3) = 3,025
Hence, The area of the square image after 3 seconds is 3,025 sq. pixels.
Learn more about Function:
https://brainly.com/question/5245372
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A car accelerates from 0 to 75 km/hr in 8 s. What is the car’s acceleration?
Answers
The acceleration formula is [tex]a=\frac{v-v_0}{t}[/tex]
Plug in the values we know.
[tex]a=\frac{75-0}{8}[/tex]
[tex]a=\frac{75}{8}[/tex]
[tex]a=9.375[/tex]
The car's acceleration is 9.375[tex]\frac{m}{s^2}[/tex]
Step 2: get the answer - 75/8 = 9.375
Step 3: label the answer - 9.375 km/hr
*optional step*: estimate or round the decimal - 9.375 is rounded to 9.4 km/hr
carlos wants to buy some new video games. each game he buys costs $36. help carlos by writing an equation that represents his total price.
Answers
Answer:
36 × (how many games he buys) = (the price)
Step-by-step explanation:
36 dollars multiplied by the number of games he buys will equal the price.
Example:
Let's say he bought 3 games.
36 × 3 = 108
So, in this case, he bought three games using $108 .
Help please | | | This is geometry by the way
Answers
Answer:
21). WX = 10
22). VW = 22
23). WY = 20
24). VX = 32
25). WZ = 30
26). VY = 42
Step-by-step explanation:
In the figure attached,
V, W, X, Y and Z are collinear.
VZ = 52, XZ = 20 and WX = XY = YZ
21). Since XZ = 20
XY + YZ = 20
WX + WX = 20 [Since, XY = WX = YZ]
2(WX) = 20
WX = 10
22). VZ = VW + WX + XY + YZ = 52
VW + 3(YZ) = 52 [Since, WX = XY = YZ]
VW + [tex]3(\frac{XZ}{2})[/tex] = 52
VW + [tex]\frac{3}{2}\times 20[/tex] = 52
VW = 52 - 30 = 22
23). WY = WX + XY
= 2(WX)
= 20
24). VX = VW + WX
= 22 + 10
= 32
25). WZ = 3(WX)
= 30
26). VY = VZ - YZ
= 52 - 10
= 42
Brenden runs six times a week for thirty minutes and lifts three times a week for twenty minutes. Write a mathematical expression for the number of hours Brenden works out in a week.
Answers
Answer: [tex]\frac{6(#30)+3(20)}{60}[/tex]
Step-by-step explanation:
6(30)+3(20)
=180+60
= 240/60
=4 hours
Inverse Function f(x)= -4 + 2/3x
Answers
Answer:
[tex]f^{-1}(x)=\frac{3x}{2} +6[/tex]
Step-by-step explanation:
hope this helps
what is the expression of “the sum of n and the sum of 8 and 6?”
Answers
Answer:
n+8+6
Sum means = and and means + so n+8+6
A force of 120 N is applied to an object that accelerates at a rate of 2 m/sec2. What is the mass of the object?
Answers
Answer:
This is my answer is
Force=mass × acceleration.
120=mass × 2.
120=2m.
mass=60kg
12=15(z-1/5) does anybody know how to solve this
Answers
Answer:
-15
Step-by-step explanation:
Please help me with my homework my homework question
Answers
Answer:
(B) Subtract 3x from both sides of the equation, and then divide both sides by 2.
Can't read the second question fully.
(A) 0.53
Step-by-step explanation:
Number 1:
If we have the equation [tex]3x + 2 = 5x[/tex], our first goal is to get rid of the x term on one side.
To do this we can subtract 3x from both sides. This leaves our equation to [tex]2=2x[/tex]. To find x, we want to divide both sides by 2 since 2x divided by 2 is just x. Our goal is to isolate x. This leaves [tex]x=1[/tex].
I couldn't read Number 2 fully - I'm sorry :c
Number 3:
Given the equation [tex]3(x+0.2)=2.2[/tex], we want to isolate x on one side.
To do this, we first apply the distributive property to the left side.
[tex]3x + 0.6 = 2.2[/tex]
Now subtract 0.6 from both sides:
[tex]3x=1.6[/tex]
And divide both sides by 3.
[tex]x=0.5\overline{3}[/tex]
This rounds to 0.53.
Hope this helped!
Answer:
B
28.78
A
Step-by-step explanation:
Equation
3x + 2 = 5x
The first step is to subtract 3x from both sides.
3x - 3x + 2 = 5x - 3x
2 = 2x
The next step is to divide by two. That's the 2 in front of the two x.
2/2 = 2x/2
1 = x
So the answer must be B
The others are just not done in the right order and give wrong answers.
==================
Sorry didn't see the other two.
================
problem 2
Janette
Total Cost 555.28
4 Tires (4*122.57) 488.28 (Subtract)
Installation 65.00
Monique
Total Cost 585.34
Tires (4*136.71) 546.84 (Subtract)
Installation 38.50
Difference 26.50 (Subtract from 65)
Problem 3
3(x + 0.2) = 2.2
3x + 0.6 = 2.2
3x + 0.6 - 0.6 = 2.2 - 0.6
3x = 1.6
x = 1.6/3
x = 0.53
I need The answers now hellllp
step by step explaination
Answers
Answer:
1a. A
1b. C
2 and 3 you have to draw
4a. 90 degree angle
4b. 180 degree angle
5a. 112 degrees
5b. 145 degrees
Step-by-step explanation:
for 5 you just subtract the given values from 360
Answer:
1a) A
(both B and C intersect at A)
1b) not sure
2a) draw 270 degree angle
360/4 = 90
90+90+90 = 270 = 3/4
2b) draw an angle less than 90 degree to get an acute angle
3a) first draw a 90 degree angle then divide the angle into two half and you ll get an angle of 45 degrees
90/2 = 45
but since you re not allowed to use compass or protactor so you might not get exact 45 but near to it
3b) draw a 90 degree angle facing downward and thats 270 degree
hope you get what im trying to say if not you can ask me again
4a) acute angle (90 degree)
4b) reflex angle (180 degree)
5a) 112 degree
118 + 130 + x = 360
248 + x = 360
x = 360 - 248
x = 112
5b) 145 degree
360 - 215 = 145
im posting the solutions and the answers of your previous questions here
6a) a = 60 degree
6b) b = 27 degree
because sum of interior angles of a triangle is 180
7a) b = 60 degree and a = 30 degree
7b) x = 36 degree and x = 36 degree
isosceles triangle has 2 same angles and 1 different
x + x + 108 = 180
2x + 108 = 180
2x = 180 - 108
2x = 72
x = 72/2
x = 36
8a) x = 95 degree
8b) a = 100 degree
9) steps;
draw a line segment QR
draw 120 degree angle at point Q
now open the compass of 2cm (or of your own choice) and draw a small arc from point Q such that it intersects line PQ and QR and name that point between QR as O
now from point O, open your compass of same measurement and draw an arc that cuts the previous arc
now draw a line from point Q to join the new formed arc
now using a protactor measure both the newly formed angles
Step-by-step explanation:
George did the following problem. See if you can spot the error. HINT: Order of operations was used to solve this problem. - 8 • - 3 + 27 ÷ 3 - 8 + 24 ÷ 3 - 8 + 8 = 0
Answers
Answer:
Step-by-step explanation:
oh yea he misplaced the 8
Which statement is true about the climbers’ heights?
Answers
Answer:
Both climbers rested on the wall at a constant height for 2 minutes.
Step-by-step explanation:
First solve for x, then find ∡RQW. ∡WQP=139+x, ∡RQW=31+x & ∡RQP=152°
Answers
Answer:
[tex]x = -9[/tex]
[tex]RQW = 22[/tex]
Step-by-step explanation:
Given
[tex]WQP = 139 + x[/tex]
[tex]RQW = 31 + x[/tex]
[tex]RQP = 152[/tex]
Required
Determine x and WQP
From the attachment;
[tex]RQP = RQW + WQP[/tex]
Substitute 152 for RQP, 31 + x for RQW, 139 + x for WQP
[tex]152 = 31 + x + 139 + x[/tex]
Collect Like Terms
[tex]152 - 31 - 139 = x + x[/tex]
[tex]-18 = 2x[/tex]
Divide both sides by 2
[tex]\frac{-18}{2} = x[/tex]
[tex]x = -9[/tex]
To solve for RQW; substitute -9 for x in RQW = 31 + x
[tex]RQW = 31 + (-9)[/tex]
[tex]RQW = 31 -9[/tex]
[tex]RQW = 22[/tex]
It also says “what is located 5 units from point M”
Answers
Answer:
[tex]\Large \boxed{\mathrm{Point \ C}}[/tex]
Step-by-step explanation:
Point C is located 5 units from points M.
Point C : (-1, 6)
Point M : (-6, 6)
Distance between two points:
[tex]d=\sqrt{(x_2-x_1)^2 +(y_2-y_1)^2 }[/tex]
[tex]d=\sqrt{(-6-(-1))^2 +(6-6)^2 }[/tex]
[tex]d=\sqrt{(-5)^2 +(0)^2 }[/tex]
[tex]d = \sqrt{25} =5[/tex]
The distance between Point C and point M is 5 units.
Answer:point B
Step-by-step explanation:
David flips a coin and rolls a standard number cube. Find the probability that the coin will show heads and the cube will show a three. Write the probability as a fraction in simplest form.
Answers
—
12
A=
f forr
2
=
o
Need help with that plz help me
Answers
Answer:
r = 2a + k
Step-by-step explanation:
Hope this helps :D
The height of a triangle is 4 inches. Greater than twice it's base. The area of the triangle is no more than 168 in.². Which any quality can be used to find the possible lengths, x, of the base of the triangle
Answers
Step-by-step explanation:
this problem seeks to test our knowledge on word problems and algebra
Solution
let the base be x, and
the height h = 2x+4
We know that area of a triangle is given as
[tex]A= \frac{1}{2} b*h[/tex]
substituting our given values we have
[tex]168= \frac{1}{2} x*(2x+4)\\\\168= \frac{2x^2+4x}{2} \\\\168= x^2+2x\\\\[/tex]
re-arranging we have
[tex]x^2+2x-168=0\\\\[/tex]
we can now find two factors that will add up to give 2 and multiply to give -168
they are 14 and -12
[tex]x^2-14x+12x-168=0\\\\x(x-14)+12(x- 14)=0\\\\x+12=0\\\\x=-12\\\\x-14=0\\\\x=14[/tex]
The possible base of the triangle is 14 in
and the height is
[tex]h= 2x+4\\\\h=2(14)+4\\\\h= 28+4\\\\\h= 32 in[/tex]
Combine the like terms to create an equivalent express −3x−6+(−1)
Answers
Answer:
-3x-5
Step-by-step explanation:
-3x-6+(-1)
-3x-6-1
-3x-5
3^2. is an example of
Answers
Answer:
3 times 2 which is 6
Step-by-step explanation:
3 squared
3 to the second power
An exponent
The correct answer is 9
The null hypothesis suggests that the two samples come from ___________ distribution(s), and the experimental hypothesis suggests that the two samples come from _____________ distribution(s). Group of answer choices the same; different different; different different; the same the same; the same
Answers
You have $250 comma 000 in an IRA (Individual Retirement Account) at the time you retire. You have the option of investing this money in two funds: Fund A pays 2.4% annually and Fund B pays 7.4% annually. How should you divide your money between Fund A and Fund B to produce an annual interest income of $9 comma 000?
Answers
Answer:
$190,000 goes to fund A while $60,000 goes to fund B to earn an annual interest income of $9,000
Step-by-step explanation:
Here, we are interested in knowing the way the money should be divided between the interest rates to give an annual interest totaling $9,000.
Let’s have the amount going to Fund A as $x while $y is the amount going to Fund B.
Although, we do not know the value of these amounts, we know that they both total $250,000
Thus, mathematically;
x + y = 250,000 •••••••••••(i)
Now also, let’s work with the percentages to get the interests:
For fund A;
2.4% of x = interest
2.4/100 * x = 2.4x/100
For fund B;
7.4% * y = interest
7.4/100 * y = interest
7.4y/100 = interest
Adding both gives a total of $9,000
Mathematically, that would be;
2.4x/100 + 7.4y/100 = 9,000
Multiply through by 100;
2.4x + 7.4y = 900,000 •••••••(ii)
From i, x = 250,000 -y
Substitute this into ii
2.4(250,000-y) + 7.4y = 900,000
600,000 -2.4y + 7.4y = 900,000
Collecting like terms, we have;
7.4y-2.4y = 900,000-600,000
5y = 300,000
y = 300,000/5
y = $60,000
But x = 250,000 - y
x = 250,000 - 60,000
x = $190,000
3/2x-2/3x=2 please help!!!
Answers
Answer:
NO SOLUTION
Step-by-step explanation:
3/2x-2/3x=2
find the common denominater which is 6 and whatever you do to the bottom you have to do to the top, in turn you'll get
6/6x-6/6x=2
In this case since their both the same you subtract x from x and when you do that you get,
NO SOLUTION = 2
Answer:
x= 12/5 =2.400
Step-by-step explanation:
Sorry if i'm wrong but i hope i'm not hope u get a good grade : )
work out your perimeter of a semicircle with raduis 3cm give your answer in terms of pie
Answers
Answer:
18.84 cm
Step-by-step explanation:
P = 2 × pi × r
= 2 × 3.14 × 3cm
= 6cm × 3.14
= 18.84 cm
Answer:
9/2 π
Step-by-step explanation:
[tex]Perimeter = \frac{\pi r^2}{2} \\r = 3\:cm\\\\P = \frac{\pi \times 3^2}{2}\\ \\P = \frac{\pi \times 9}{2}\\ \\P = \frac{9 \pi}{2} \\\\P = \frac{9}{2} \pi[/tex]
Which addition expression has the sum 8 – 3i ? (9 + 2i) + (1 – i) (9 + 4i) + (–1 – 7i) (7 + 2i) + (1 – i) (7 + 4i) + (–1 – 7i)
Answers
Answer:(9+4i) + (-1-7i), or B on edgunity
Step-by-step explanation:
Answer:
B
Step-by-step explanation:
Just took it. Edg 2020. Hope this helps :)
Solve x^3 = 64 over 27
Answers
Answer:
x = 4/3
Step-by-step explanation:
x³ = 64/27x³ = 4³/3³ ⇒ expressing 64 and 27 as cubes∛x³= ∛4³/3³ ⇒ cube roots of both sidesx = 4/3 ⇒ answerIdentity the slope
of the line below.
y = -2x +3
Your answer
Answers
Answer:
-2
Step-by-step explanation:
3 would be your y intercept
-2 is your slope
Answer:
-2
Step-by-step explanation:
[tex]Slope =m\\\\y = -2x +3\\y =\:\:mx+b\\\\m = -2[/tex]
2/3c=18 what does c equal to
Answers
Answer: 27
Step-by-step explanation:
Answer:
c = 27
Step-by-step explanation:
Solve for c:
(2 c)/3 = 18
Hint: | Multiply both sides by a constant to simplify the equation.
Multiply both sides of (2 c)/3 = 18 by 3/2:
(3×2 c)/(2×3) = 3/2×18
Hint: | Express 3/2×2/3 as a single fraction.
3/2×2/3 = (3×2)/(2×3):
(3×2)/(2×3) c = 3/2×18
Hint: | Express 3/2×18 as a single fraction.
3/2×18 = (3×18)/2:
(3×2 c)/(2×3) = (3×18)/2
Hint: | Cancel common terms in the numerator and denominator of (3×2 c)/(2×3).
(3×2 c)/(2×3) = (2×3)/(2×3)×c = c:
c = (3×18)/2
Hint: | In (3×18)/2, divide 18 in the numerator by 2 in the denominator.
18/2 = (2×9)/2 = 9:
c = 3×9
Hint: | Multiply 3 and 9 together.
3×9 = 27:
Answer: c = 27
What is the value of the expression below when y=6y=6? y^2 -5y-4 y 2 −5y−4
Answers
Answer:
2
Step-by-step explanation:
Given expression:
y^2 - 5y - 4
y = 6
Substitute y = 6 into the expression
y^2 - 5y - 4
6^2 - 5(6) - 4
(6*6) - (5*6) - 4
36 - 30 - 4
36 - 34
2
The value of the expression y^2 - 5y - 4 is 2 when y = 6