Answers
Answer:
just cuase u answered mine x=8
Step-by-step explanation:
good luck
Related Questions
A car travels the first 50 km of its journey at an average speed of 25 m/s and the next 120 km at an On his outward journey, Ali travelled at a speed of s km/h for 2.5 hours. On his return journey, he increased his speed by 4 km/h and saved 15 minutes. Find Ali's average speed for the whole journey. Speed of 80 km/h. The car completes the last part of its journey at an average speed of 90 km/h in 35 minutes. Find the average speed for its entire journey, giving your answer in km/h.
Answers
Answer:
The car's average speed for the entire journey = 84.315 km/h
Step-by-step explanation:
Correct Question
A car travels the first 50km of its journey at an average speed of 25m/s and the next 120 km at an average speed of 80km/h. the car completes the last part of its journey at an average speed of 90km/h in 35 minutes. Find the average speed for its entire journey, giving your answer in km/h.
Solution
Average speed is given as total distance travelled divided by total time taken.
So, we will compute the distance covered for each part of the journey and the corresponding time it takes to cover each of these distances.
- The car travels the 50 km first part of the journey at a speed of 25 m/s.
25 m/s = 90 km/h
We have the distance covered in the first part of the journey, now, we need the time taken to cover the distance.
Speed = (Distance/Time)
Time = (Distance/Speed)
Distance = 50 km, Speed = 90 km/h
Time = (50/90) = 0.5556 hr
- The next part, the car covers 120 km at a speed of 80 km/h
Time = (Distance/Speed) = (120/80) = 1.5 hr
- For the last part of the journey, the car travels with an average speed of 90 km/h for 35 minutes.
35 minutes = (35/60) hr = 0.5833 hr
Here, we need to calculate the distance covered for the last part.
Speed = (Distance/Time)
Distance = (Speed) × (Time) = 90 × 0.5833 = 52.5 km
Total distance covered = 50 + 120 + 52.5 = 222.5 km
Total time taken = 0.5556 + 1.5 + 0.5833 = 2.6389 hr
Average Speed = (222.5/2.6389) = 84.315 km/h
Hope this Helps!!!
which linear inequality is represented by the graph?
Answers
y < or = 1/2x + 3
Explanation
We know when x = 0, y has to be 3 (y intercept).
Therefore y>= or <= 2x + 4 is wrong since substituting x = 0 gives y=4.
Since you need the shaded part of the graph that’s under the line you need all the y values that are smaller than and equal to the inequality.
If it was greater than or smaller to the area above the line would be shaded.
use
tiles
Algebra
factor for X^2-2x-3
Answers
Answer:
I hope it's correct
What is the volume of the cylinder to the nearest whole number? a) 942 cm3 b) 3,534 cm3 c)471 cm3 d) 9,420 cm3
Answers
Answer:
V = 3534 cm^3
Step-by-step explanation:
The volume of a cylinder is given by
V = pi r^2 h
the radius is 7.5 and the height is 20
V = pi ( 7.5)^2 * 20
V =1125 pi cm^3
Using the pi button for pi
V =3534.291735 cm^3
Rounding to the nearest whole number
V = 3534 cm^3
Answer:
b)3534 cm^3
Step-by-step explanation:
To find the area of a cylinder, you first have to find the area of the base which is in the shape of a circle. The area of a circle is given by the equation πr^2. In this case r, the radius, is 7.5 cm. So plugging in 7.5 for r you get 7.5^2 × π. Plugging in 3.1415 for π you get ~176.671. Now all you do is multiply this by the height, 20cm, and get the answer of ~3534 cm^3.
Can someone help assist me on this Honors Algebra 2 Problem? Challenge Problems #6. The distance from a point on the curve y=√x to the point (2,0) is equal to 2 at what points on the curve? (Hint: Draw a picture.)
Answers
Answer: (0, 0) & (3, √3)
Step-by-step explanation:
Since we need a distance of 2, I graphed y = √x and then drew a circle at center (2, 0) and radius of 2 to see where they intersect.
The coordinates of intersection can be determined by solving a system of equations.
Equation 1: y = √x
Equation 2: (x - 2)² + y² = 2²
I will use the Substitution method with Equation 2 to solve for x:
(x - 2)² + (√x)² = 2² substituted y with √x
x² - 4x + 4 + x = 4 expanded binomial
x² - 3x + 4 = 4 added like terms
x² - 3x = 0 subtracted 4 from both sides
x(x - 3) = 0 factored
x = 0 x - 3 = 0 applied Zero Product Property
x = 3
Next, solve for y using Equation 1:
x = 0: y = √0 = 0
x = 3: y = √3
Coordinates of intersection are: (0, 0) & (3, √3)
Answer:
(0, 0) & (3, √3)
Step-by-step explanation:
not quite sure of the answer. help me out???
Answers
Answer:
C = pi * d
Step-by-step explanation:
C = 2 * pi *r
We can replace 2 * r with d since the diameter is twice the radius
C = pi * 2*r
C = pi * d
Let R be the relation on the set of ordered pairs of positive integers such that ((a, b), (c, d)) ∈ R if and only if ad = bc. Arrange the proof of the given statement in correct order to show that R is an equivalence relation. (Prove the given relation is reflexive first, and then symmetric and transitive.)
Answers
Answer:
The given relation R is equivalence relation.
Step-by-step explanation:
Given that:
[tex]((a, b), (c, d))\in R[/tex]
Where [tex]R[/tex] is the relation on the set of ordered pairs of positive integers.
To prove, a relation R to be equivalence relation we need to prove that the relation is reflexive, symmetric and transitive.
1. First of all, let us check reflexive property:
Reflexive property means:
[tex]\forall a \in A \Rightarrow (a,a) \in R[/tex]
Here we need to prove:
[tex]\forall (a, b) \in A \Rightarrow ((a,b), (a,b)) \in R[/tex]
As per the given relation:
[tex]((a,b), (a,b) ) \Rightarrow ab =ab[/tex] which is true.
[tex]\therefore[/tex] R is reflexive.
2. Now, let us check symmetric property:
Symmetric property means:
[tex]\forall \{a,b\} \in A\ if\ (a,b) \in R \Rightarrow (b,a) \in R[/tex]
Here we need to prove:
[tex]\forall {(a, b),(c,d)} \in A \ if\ ((a,b),(c,d)) \in R \Rightarrow ((c,d),(a,b)) \in R[/tex]
As per the given relation:
[tex]((a,b),(c,d)) \in R[/tex] means [tex]ad = bc[/tex]
[tex]((c,d),(a,b)) \in R[/tex] means [tex]cb = da\ or\ ad =bc[/tex]
Hence true.
[tex]\therefore[/tex] R is symmetric.
3. R to be transitive, we need to prove:
[tex]if ((a,b),(c,d)),((c,d),(e,f)) \in R \Rightarrow ((a,b),(e,f)) \in R[/tex]
[tex]((a,b),(c,d)) \in R[/tex] means [tex]ad = cb[/tex].... (1)
[tex]((c,d), (e,f)) \in R[/tex] means [tex]fc = ed[/tex] ...... (2)
To prove:
To be [tex]((a,b), (e,f)) \in R[/tex] we need to prove: [tex]fa = be[/tex]
Multiply (1) with (2):
[tex]adcf = bcde\\\Rightarrow fa = be[/tex]
So, R is transitive as well.
Hence proved that R is an equivalence relation.
The relation R is an equivalence if it is reflexive, symmetric and transitive.
The order to options required to show that R is an equivalence relation are;
((a, b), (a, b)) ∈ R since a·b = b·aTherefore, R is reflexiveIf ((a, b), (c, d)) ∈ R then a·d = b·c, which gives c·b = d·a, then ((c, d), (a, b)) ∈ RTherefore, R is symmetricIf ((c, d), (e, f)) ∈ R, and ((a, b), (c, d)) ∈ R therefore, c·f = d·e, and a·d = b·cMultiplying gives, a·f·c·d = b·e·c·d, which gives, a·f = b·e, then ((a, b), (e, f)) ∈RTherefore R is transitiveFrom the above proofs, the relation R is reflexive, symmetric, and transitive, therefore, R is an equivalent relation.Reasons:
Prove that the relation R is reflexive
Reflexive property is a property is the property that a number has a value that it posses (it is equal to itself)
The given relation is ((a, b), (c, d)) ∈ R if and only if a·d = b·c
By multiplication property of equality; a·b = b·a
Therefore;
((a, b), (a, b)) ∈ R
The relation, R, is reflexive.Prove that the relation, R, is symmetric
Given that if ((a, b), (c, d)) ∈ R then we have, a·d = b·c
Therefore, c·b = d·a implies ((c, d), (a, b)) ∈ R
((a, b), (c, d)) and ((c, d), (a, b)) are symmetric.
Therefore, the relation, R, is symmetric.Prove that R is transitive
Symbolically, transitive property is as follows; If x = y, and y = z, then x = z
From the given relation, ((a, b), (c, d)) ∈ R, then a·d = b·c
Therefore, ((c, d), (e, f)) ∈ R, then c·f = d·e
By multiplication, a·d × c·f = b·c × d·e
a·d·c·f = b·c·d·e
Therefore;
a·f·c·d = b·e·c·d
a·f = b·e
Which gives;
((a, b), (e, f)) ∈ R, therefore, the relation, R, is transitive.Therefore;
R is an equivalence relation, since R is reflexive, symmetric, and transitive.
Based on a similar question posted online, it is required to rank the given options in the order to show that R is an equivalence relation.
Learn more about equivalent relations here:
https://brainly.com/question/1503196
Tublu buys a cylindrical water tank of height 1.4m and diameter 1.1m to catch rainwater off his roof. He has a full 2 litres tin of paint in his store and decides to paint the tank (not the base). If he uses 250 ml to cover 1 2 , will he have enough paint to cover the tank with one layer of paint? [take = 3.142]
Answers
Answer:
He will have enough paint to cover the tank with one layer of paint
Step-by-step explanation:
To calculate the area of the surface that has to be painted, we will have to calculate the lateral surface of the cylinder
Lateral surface of the cylinder is given by
A=2πrh
Where,
π=3.142
r=1.1/2m=
h=1.4m
A=2πrh
=2*3.142*1.1/2*1.4
=4.84m^2
He uses 250ml to cover 1m^2
To cover 4.84m^2, he will use
4.84m^2 × 250ml of paint
=1,210ml of paint is needed
He has 2 litres of paint
2litres =2000ml
Tublu has 2000ml of paint but needs 1210ml of paint
Therefore,
He has an excess of 2000-1210
=790ml
The answer is yes, he will have enough paint to cover the tank with one layer of paint.
pleassssssssssssssssssss helppppppppp
Circle A has a radius of 8, and arc CT has a length of 18.08. Circle C is a different circle with radius 5 and arc EF. Angle ECF is congruent to angle CAT. What is the length of arc EF?
Answers
Answer:
The length of arc EF is 11.3
Step-by-step explanation:
Since both angles are congruent, we can say that they are equal in value
Mathematically, the length of an arc can be calculated using the formula;
L = theta/360 * 2 * pi * r
where theta is the angle subtended and r is the radius of the circle
So for circle A, we have;
18.08 = theta/360 * 2 * π * 8
theta = (360 * 18.08)/16π
Theta = 406.8/π
Now we shall substitute this angle in the second circle to get its length
L = 406.8/π * 1/360 * 2 * π * 5
L = 406.8/36 = 11.3
10. 80 machines can produce 4800 identical pens in 5 hours. At this rate
a) how many pens would one machine produce in one hour?
b) how many pens would 25 machines produce in 7 hours?
Answers
Answer:
a) 12 (Simply divide 4800/5 to get 960. Then divide 960/80 to get 12)
b) 2100 (Simply multiply 12 by 25 by 7)
Hope it helps <3
I don't understand???? I'll give the brainliest!!!!!
Answers
Answer:
37Option A is the correct option.
Step-by-step explanation:
[tex] {a}^{2} + {b}^{2} - 2ab \: \cos \: c \: = {c}^{2} \\ a = 4 \\ b = 5 \\ c = 2 \\ \\ 2ab \: cos \: c = {a}^{2} + {b}^{2} - {c}^{2} \\ \: \: \: \: \: \: \: \: = {(4)}^{2} + {(5)}^{2} - {(2)}^{2} \\ \: \: \: \: \: \: \: \: = 16 + 25 - 4 \\ \: \: \: \: \: \: = 41 - 4 \\ \: \: \: \: \: \: = 37[/tex]
Hope this helps...
Good luck on your assignment...
Mrs. Sing invests $12,876 for her business at an annual interest rate of 7 percent for 3 years. Which number will Mrs. Sing substitute for r in the simple interest formula? I = p r t
Answers
Answer:
she wills substitute r with 7%.
Step-by-step explanation:
Just did it.
Answer:
R = 7%
Principal (P)
Rate (R)
Time (t)
Step-by-step explanation:
The full intrest rate formula is i=prt
You are looking for r
R is the interest rate 7%
So i = 12,876*7%*3years will be the full equation.
Find the equation of the line shown. Please help!!!!!!!
Answers
Answer:
y=2x+3
Step-by-step explanation:
the gradient is 2 and the y intercept is 3
Answer:
y = 2x + 3
Step-by-step explanation:
The equation of a line in slope- intercept form is
y = mx + c ( m is the slope and c the y- intercept )
Calculate m using the slope formula
m = [tex]\frac{y_{2}-y_{1} }{x_{2}-x_{1} }[/tex]
with (x₁, y₁ ) = (0, 3) and (x₂, y₂ ) = (1, 5) ← 2 points on the line
m = [tex]\frac{5-3}{1-0}[/tex] = 2
The line crosses the y- axis at (0, 3) ⇒ c = 3
y = 2x + 3 ← equation of line
Rewrite each expression using distributive property.
6(y + 7) please help!!!!!
Answers
Answer:
6y + 42
Step-by-step explanation:
Answer: 6y+42
Step-by-step explanation:
When you distribute, you multiply the coefficient by each term in the parenthesis.
6y+42
6TH GRAD LE MATH PLEASE HELP ME
Answers
Answer: 6
Step-by-step explanation: I think..... this is a division sign, nvm... so 4 divided by 8/12 is basically 4 x 12/8 which is 48/8 simplified is/equals 6!
Answer:
6
Step-by-step explanation:
4 / 8/12 = 4 * 12/8 = 4 * 3/2 = 6
use the present value formula to determine the amount to be invested now, or the present value needed.
the desire accumulated amounts is $140,000 after 2 years invested in an account with 8% interest compounded quarterly.
the amount to be invested now, or the present value needed is?
Answers
Answer:
The amount to be invested now or the present value is $119,484.51
Step-by-step explanation:
FV=PV(1+r/n)^nt
Make PV the subject of the formula
PV=FV/(1+r/n)^nt
Where,
PV=present value=?
FV=future value=$140,000
r=interest rate=8%
n=number of periods=4
t=time=2 years
PV=FV / (1+r/n)^nt
=140,000 / (1+0.08/4)^4*2
=140,000 / (1+0.02)^8
=140,000 / (1.02)^8
=140,000 / 1.1717
=119,484.5096
Approximately 119,484.51
PV=$119,484.51
The amount to be invested now or the present value is $119,484.51
3. In the polygon below, what kind of
angle is P?
A Acute
B Obtuse
C Right
D Straight
Answers
Answer:a
Step-by-step explanation:
plzz helpp mee in this question!!!
Answers
Answer:
Please see attached picture for full solution.
Helppp!!!! please!!!
Answers
Answer:
A) 52.5 inches²
Step-by-step explanation:
The equation for the area of a trapezoid is a=1/2h(b1+b2). This basically means that you take the height of the trapezoid, multiply it by the top base plus the bottom base and divide that by 2. When you do this, you take 8.5 plus 6.5, which equals 15, and multiply that by 7 to get 105. After you get this, you divide it by 2 to get 52.5 inches².
55=2.7[tex]55=2.7\sqrt{x} +14[/tex] what is the value of x
Answers
Answer:
230.59
Step-by-step explanation:
55 = 2.7sqrt(x) + 14
41 = 2.7sqrt(x)
15.185=sqrt(x)
x = 15.185^2
x=230.59
Classify the triangle if two angles in the triangle measure 40 and 50°.
Answers
Answer:
Right Triangle
Step-by-step explanation:
Let's find the missing angle:
180 - (40 + 50)
180 - 90 = 90°
So we have a right triangle!
Answer:
Right Triangle
Step-by-step explanation:
If one of the angles measure 40 and the other 50 that means that the final angle is 90 which makes it a right triangle.
Part 1 of 1 -
Question 2 of 50
2 Points
Solve the equation for x. x/3 -1 = -2
Copyright 2010-2020 edtell, LLC. All rights reserved. Portions of this software are copyrighted by other parties as described in the Acknov
Answers
Answer:
x = -3
Step-by-step explanation:
When asked to solve the equation for x, it mean that put x only on one side, and everything else on the other side. So....
x/3 - 1 = -2
x/3 = -1 ( add 1 on both side)
x = -3 (x3 on both side)
can somebody help me plz
Answers
Answer:
126 people
Step-by-step explanation:
9/5 is the ratio tea/coffee
let x be the one who preferred coffee and x+36 preferred tea
9/5=x+36/x
9x=5x+5(36)
9x-5x=180
4x=180
x=180/4=45
x=45 coffee
x+36=45+36=81
45+81=126
check : 81/45= 9/5
Which statement explains how the lines x+y=2 and y=x+4 are related?
(1) They are parallel.
(2) They are perpendicular.
(3) They are the same line.
4) They are not related.
Answers
Answer:
(2)They are perpendicular.
Step-by-step explanation:
If x - 10 is a factor of x2 - 8x - 20, what is the other
factor?
X +
Answers
Answer:
(x + 2)
Step-by-step explanation:
When we factor the expression x² - 8x - 20, we should get (x + 2)(x - 10).
Alternatively, we can use synthetic division or long division to get our answer.
Answer:
x + 2
Step-by-step explanation:
got it right edg '22
Helppp!!!! please!!!
Answers
Answer:
c
Step-by-step explanation:
The formula for the volume of a square pyramid is [tex]a^{2} \frac{h}{3}[/tex]. a is your base edge and the h is your height. In this case it would be [tex]5^{2} \frac{7}{3}[/tex]. when you wokr it out it would be 58.333, or 58 which is c.
also you would do 5 x 5 then you would multiply it by 7/3.
Which pair of expressions is equivalent?
Answers
Answer:
Solve
(15x+y)and 20x+10y
2
POSSIBLE POINTS: 5.26
What is the volume of a rectangular solid with a length of 12 feet, a width of 3 feet, and a height of 4 feet
Answers
Answer:
The volume is 144.Step-by-step explanation:
Volume of a rectangular solid = l × w × h
where
l is the length
w is the width
h is the height
From the question
l = 12 feet
w = 3 feet
h = 4 feet
Volume = 12 × 3 × 4
= 144 feet
Hope this helps you.
One batch of trail mix can be made by mixing 3 cups of granola with 0.75 cup of raisins. Hamid needs to make a bigger batch of trail mix. He makes a graph to be sure the mixture will be correct. On a coordinate plane, the point (3, 0.75) is plotted. How can he use the graph to find an equivalent ratio?
Answers
Answer:
Im pretty sure its C
Answer: The answer is C
Step-by-step explanation:
here are the ingredients for making pineapple sorbet for 6 people. 800 g pineapple 4 egg whites 1/2 lemon 100 g caster sugar Dan makes pineapple sorbet. he uses 2 and a 1/2 lemons How many people does he make pineapple sorbet for?
Answers
Answer:
30 people
Step-by-step explanation:
If you start off with 1/2 a lemon for 6 people, then 1 whole would be 12. 1 1/2 would be 18 people and 2 whole lemons would be 24. so 2 1/2 is 30 people.