Answer:
48 minutes
Step-by-step explanation:
Given that:
Time taken by Janet = 3 hours
Janet's rate = 1/3 job / hour
Time taken by Garry = 2 hours
Garry's rate = 1/2
Rate of working together :
1/3 + 1/2 = (2 + 3) /6 = 5/6 job/hour
If Janet works for one hour before Garry joins ;
1/3 of the job has been done by Janet
1 - 1/3 = 2/3 of the job left
Hence to finish the job together, it will take :
Fraction of JOB left ÷ rate of working together
(2/3 ÷ 5/6)
= 2 /3 * 6/5
= 12 / 15
= 4 / 5 hours
To minutes
(4/5) * 60
= 240/5
= 48 minutes
Answer:
1 4/5
Step-by-step explanation:
6x + 21y = 103
-6x + 23y = 51
A train traveled at 62 miles per hour for 7.5 hours. How far did the train travel in 7.5 hours? Use the formula D = r x t
d=distance
r=rate
t=time
Answer:
465 miles
Step-by-step explanation:
D = r * t
D = 62 * 7.5 = 465 miles
Answer:
465
Step-by-step explanation:
We know that the rate is 62 mph. The time is 7.5 h.
Plug it into the existing equation:
D = r × t becomes D = 62 × 7.5
Just stick that into a calculator to get 465.
explain how multiplying 4/10 and 3/10 is similar to multiplying 0.4 and 0.3 (please only answer if you for sure know the answer!!)
Find the value of X while a⊥B and b║c
Can someone please actually help me with my math assignments
Select the correct answer. Owen has enough materials to build up to 10 birdhouses in shop class. Each birdhouse needs 12 square feet of wood. The function W(b) = 12b represents the total amount of wood that Owen would need to build b birdhouses. What domain and range are reasonable for the function? A. D: 0 ≤ b ≤ 10 R: 12 ≤ W(b) ≤ 120 B. D: 10 ≤ b ≤ 12 R: 0 ≤ W(b) ≤ 120 C. D: 0 ≤ b ≤ 120 R: 0 ≤ W(b) ≤ 10 D. D: 0 ≤ b ≤ 10 R: 0 ≤ W(b) ≤ 120
Answer:
a
Step-by-step explanation:
a
7) The height of a box is represented by the expression
(x.- 2) centimeters. The volume of the same box is
represented by the expression (x3 - 8 ) cubic centimeters.
Which expression below represents the area of the base of the
box?
A. x2 – 2x + 4
B. x2 + 2x + 4
C. X? + 6x - 4
D. x2 - 6x + 4
Given:
Height of box = (x-2)
Volume of box = [tex](x^3-8)[/tex]
To find:
The expression for the base area.
Solution:
We know that,
Volume of a box(V) = Base area(B) × Height(h)
[tex]V=Bh[/tex]
[tex]\dfrac{V}{h}=B[/tex]
On substituting the given values, we get
[tex]B=\dfrac{x^3-8}{x-2}[/tex]
[tex]B=\dfrac{x^3-2^3}{x-2}[/tex]
[tex]B=\dfrac{(x-2)(x^2+2x+2^2)}{x-2}[/tex] [tex][\because a^3-b^3=(a-b)(a^2+ab+b^2)][/tex]
[tex]B=x^2+2x+4[/tex]
So, the base area is [tex]x^2+2x+4[/tex].
Therefore, the correct option is B.
why am i smart
esfcobqagd
Answer:
Because you pay attention in school. Thank you for the points!!
Step-by-step explanation:
I WILL MARK BRAINLIEST
Which Linear function is represented by the graph?
•f(x)-2x +1
•f(x)= -1/2x +1
•f(x)= 1/2x + 1
•f(x)= 2x + 1
Answer:
the second one
slope is negative go down one right 2
Is “12.95 x 10^4” a Scientific Notation? Yes or No? Explain.
Answer:
Yes
Step-by-step explanation:
Scientific notation is a way of writing very large or very small numbers. A number is written in scientific notation when a number between 1 and 10 is multiplied by a power of 10. For example, 650,000,000 can be written in scientific notation as 6.5 ✕ 10^8. and that is something Very similar.
Hope this helps!
Have a nice day!
If you find my answer helpful
Pls consider marking my answer as Brainliest! It would mean a lot!
What is the value of n in (17 × 25) × 4 = n × (25 × 4)?
Answer:
n= 17
Step-by-step explanation:
17×25 = 425
425×4= 1700
25×4=100
1700÷100= 17
Answer:
Step-by-step explanation:
(17×25)×4=n×(25×4)
or 17×(25×4)=n×(25×4)
17=n
∵ (a×b)×c=a×(b×c) [by associative law of multiplication.]
HELP QUICK PLEASE !!
Given: AABC with vertices A(5, -2), B(5, -7), and C(1, -2). Which set of
coordinates best repositions the triangle to make a coordinate proof easier?
Answer:(0,0),(0,4) and (5,0)
Step-by-step explanation:
It is easy to find lengths of horizontal and vertical segments and distances from (0,0) so always place one vertex at the origin and one or more sides on an axis.
So this answer has a y intercept and an x intercept.
How to do this question plz
Answer:
Aproximately 25 days
Step-by-step explanation:
so he goes 15.12 mph and rides for 8 hours so 15.12*8=120.96
3069.25/120.69
=25.374091 round it to nearest whole number so its 25days
Ratio number 1.50:1.38
Find the percent change from 200 to 192.
Answer:
4% change
Step-by-step explanation:
Graph each linear equation that passes through the given pair of points. Use graph paper.
1. (2,2) and (4,5)
2. (0,1/2) and (2,3/2)
3. (-1,2) and (5,0)
4(-5,-3) and (-3,5)
Answer:
The easier way to solve this is to find the two points in the coordinate axis, and just draw a line that passes through the two points.
But let's be more complete:
Let's find the equations for each line:
A linear relationship can be written as:
y = a*x + b
where a is the slope and b is the y-axis intercept.
For a line that passes through the points (x1, y1) and (x2, y2), the slope can be written as:
a = (y2 - y1)/(x2 - x1).
1) Here the points are (2,2) and (4,5)
then the slope is:
a = (5 - 2)/(4 - 2) = 3/2
y = (3/2)*x + b
And to find the value of b, we just replace the values of one of the points in the equation, in this case i will use (2, 2)
2 = (3/2)*2 + b
2 = 3 + b
2 - 3 = b
-1 = b
y = (3/2)*x - 1
2) Here the points are (0,1/2) and (2,3/2)
then the slope is:
a = (3/2 - 1/2)/(2 - 0) = 1/2
y = (1/2)*x + b
And to find the value of b, we just replace the values of one of the points in the equation, in this case i will use (0, 1/2)
1/2 = (1/2)*0 + b
1/2 = b
y = (1/2)*x + 1/2
3) Here the points are (-1,2) and (5,0)
then the slope is:
a = (0 - 2)/(5 + 1) = -1/3
y = (-1/3)*x + b
And to find the value of b, we just replace the values of one of the points in the equation, in this case i will use (-1, 2)
2 = (-1/3)*-1 + b
2 = 1/3 + b
2 - 1/3 = b
5/3 = b
y = (-1/3)*x + 5/3
4) Here the points are (-5,-3) and (-3,5)
then the slope is:
a = (5 + 3)/(-3 + 5) = -4
y = -4*x + b
And to find the value of b, we just replace the values of one of the points in the equation, in this case i will use (-3, 5)
5 = -4*-3 + b
5 = 12 + b
5 - 12 = b
-7 = b
y = -4*x - 7
Now that we have all the equations, we can find the graphs.
where the colors are:
(4) green
(3) orange
(2) Blue
(1) Gray.
The number of girls in a classroom is greater than the number of boys. There are more than 2 girls. Write a system of inequalities to model this situation. Use x to represent the number of boys and y to represent the number of girls.
Answer:
x < y > 2
Step-by-step explanation:
Girls is more than boys, so:
y > x
Girls is more than 2, so:
y > 2
So:
x < y > 2
I hope this helps you :)
In induction you can form an educate guess or ____ about a pattern you have found
A. Congruence
B. conjuctuion
C. conjugation
D. conjucter
Answer:
A
Step-by-step explanation:
Answer:
The answer is C - conjugation
Hope this helps!
Determine whether the lines with the given slopes are parallel, perpendicular, or neither.
m1= 1/2 & m2= 0.5
Answer:
The given lines are parallel.
we already know that for parallel condition we apply;
m1=m2
1/2=0.5
0.5=0.5
pls try and show work due today
Answer:
Step-by-step explanation:
you start from 2 on the y axis and then go up 4 and right 3 so it will take you to coordinate point (6,3) then you start from 2 on the y axis again and go down 4 and left 3
find the area of the regular hexagon PQRSTU of sides 8 cm as shown in the figure
Answer:
Area = 245m^2
Step-by-step explanation:
We can split this figure into 2 parts, a rectangle and a trapezoid.
Rectangle Sides = 10m and 20m
Area = 10m x 20m = 200m
Trapezoid formula = a+b/2(h)
a and b are the 2 bases and h is the height
Using a little deductive reasoning we get the following, 5+10/2(6)
This simplifies to 15/2(6) -->
7.5(6) = 45
Thus, our area is 200 + 45, or 245m^2
Jay wants to buy a book for $8.00. The sales tax is 6%. How much will Jay pay for the book including tax?
Answer: $8.48
Step-by-step explanation: 8x.06 = .48 +8 = $8.48
equivalent ratio to 2:5
Answer:
4:10
8:20
16:40
1:2.5
Step-by-step explanation:
Linear pairs definition?
Answer:
A linear pair is two adjacent angles whose sides that are not common form a straight line.
Step-by-step explanation:
help me pleaseeeee :)
Can you guys pls help me. I'll give brainliest
ILL MARK BRAINLIEST IF FAST
Select the correct answer.
Which table represents a linear function that has a greater unit rate than that of the function y = 200x + 50?
Answer:
D
Step-by-step explanation:
A unit rate is basically which one increases more as time goes on. Now. to make it easier let me explain visual.
You have 50 apples at the start and every hour you get 200 more apples, sweet!
Now let's look at the chart.
The first one is 200x+100, this is wrong since this has a better start but you don't get as much apples.
Same goes for the B and C. The only one that would make sense is D since you're also adding 10 more apples for each one you increase.
solve each system of equations using substitution. x×y=5 4+y=-x
Answer:
Step-by-step explanation:
[tex]\left \{ {{xy=5} \atop {4+y=-x}} \right.\\\\<=> \left \{ {{xy=5} \atop {x=-4-y}} \right.\\\\=> \left \{ {{(-4-y)y=5} \atop {x=-4-y}} \right. \\\\<=> \left \{ {{-y^{2}-4y =5} \atop {x=-4-y}} \right. \\\\<=> \left \{ {{y^{2}+4y+5 =0} \atop {x=-4-y}} \right.[/tex]
because y² + 4y + 5 = (y+2)² + 1 > 0, ∀ y ∈ R
=> y² + 4y + 5 = 0 is unreasonable
=> no solutions
help me please it's due at 2:30
Answer:
i have the same doubt
Step-by-step explanation:
pls help 10 minutes left to submit everything is on the image below
Answer:
a. 5
b. 1
c. 132
d. -2
Step-by-step explanation:
a. The square root of 4 is 2, the absolute value of -3 is 3. 2 + 3 = 5
b. 4 - (-3) / -7 = 7/ -7 = 1
c. 2 * 4^3 = 128 + (-3) - (-7) = 132
d. 2 (-7 + 3) = -8, square root to the third power of -8 is -2
I hope this helped, please mark Brainliest, thank you!!
