Marcelo jogs at a speed of 7 miles per hour when there are no hills. He plans to jog up a mountain road which will cause his speed to decrease by r miles per hour. Which of the following expressions represents the time, t, in hours it will take him to jog 13 miles up the mountain road?
a. t=13/7r
b. t=7+r/13
c.t=13-r/7
d. t=13/7+r
Answer:
2.3 hours rounded I suppose.
Step-by-step explanation:
You have jogged 5 miles from the park at a rate of r miles per hour. On your way back to the park your average speed increases by 1 mile per hour.
a. Write an expression for the time t (in hours) it takes to jog 5 miles
from the park as a function of your average speed r (in miles per hour) ___________
b. When you run back to the park, your average speed increases by 1 mph.
Write an expression representing your new speed. ___________
c. Write an expression for the time t(in hours) it takes to jog 5 miles
back to the park. ___________
d. Use your answers to parts a and c to write an expression that gives the total jogging time T (in hours) as a function of your average speed r (in miles per hour) when you are jogging away from the park. Write your answer as a single rational expression.
e. Find the total jogging time if you jogged away from the park at an average speed (r) of 4 miles per hour. Round your answer to the nearest tenth.
hours or 135 minutes
2.3 hours rounded I suppose.
Math* please help!!!!
Answer:
I think its 19.1
Step-by-step explanation:
14 + 5.1
Maybe try
Can somebody help me?? pleasee
Answer: the nswer is
Step-by-step explanation:
Answer:
9/15
Step-by-step explanation:
The line L is a tangent to the circle x2 + y2 = 45 at the point (-3, 6).
The line L crosses the x-axis at the point P.
Work out the coordinates of P.
Answer:
The point P is (-15,0).
Step-by-step explanation:
We need to find the slope of the line L to get the coordinates of P.
We know that L is tangent to the circle at point (-3, 6), which means L is perpendicular to the radius of the circle (a line between the origin (0,0) and the tangent point (-3,6))
So let's find the slope or the radius.
[tex]m_{R}=\frac{6-0}{-3-0}[/tex]
[tex]m_{R}=-2[/tex]
Now, we know that if two lines are perpendiculars their slopes follow the rule:
[tex]m_{L}=-\frac{1}{m_{R}}[/tex]
[tex]m_{L}=\frac{1}{2}[/tex]
Knowing the slope of L we can find the equation of this line. The slope-intercept equation of a line is:
[tex]y=mx+b[/tex]
[tex]y=\frac{1}{2}x+b[/tex]
Using the point (-3,6) we can find b.
[tex]6=\frac{1}{2}(-3)+b[/tex]
[tex]b=\frac{15}{2}[/tex]
The line equation will be:
[tex]y=\frac{1}{2}x+\frac{15}{2}[/tex]
The point P has only an x-coordinate value (x,0)
So we have:
[tex]0=\frac{1}{2}x+\frac{15}{2}[/tex]
[tex]x=-15[/tex]
Therefore, the point P is (-15,0).
I hope it helps you!
Which tasks are performed by individuals in the Science and Math pathway? Select all that apply.
research human behavior
design and test machinery
develop scientific theories
interpret designs and documents
perform calculations and make predictions
maintain lab equipment to perform experiments
Answer:
1, 3, 5, 6 I hope that's correct for you
Answer:
2
3
5
6
Step-by-step explanation:
hope this helps
Simplify 8(x - 4)
8x - 4
8x - 32
x - 32
x - 4
Answer:
8x-32
Step-by-step explanation:
multiply 8 with both terms
please mark this answer as brainlist
Given z1 = 9+9 (square root) 3i and z2 = 2+ (square root) 3i, what is z2-z1?
a) 8+7 (square root) 3i
b) -7-8 (square root) 3i
c) 7+10 (square root) 3i
d) -7+10 (square root) 3i
Answer:
B
Step-by-step explanation:
Answer:
Answer is B
Step-by-step explanation:
took the test edg2021
1 16
Solve the inequality
5+ - > -
x
a. x<0 or x > 2
b. x<1 or x>5
c. x<0 or x > 3
d. x <1 or x>3
Answer:
2
Step-by-step explanation:
Which answer describes the sequence {1,3,7,15,…} as a mathematical statement?
Answer:
something to do with sets
Step-by-step explanation:
I think {odd numbers from 1 to 15 inclusive, there is something more to it but this is just a idea
I urgently need help!!!!
Answer:
A. C (3,5)
Step-by-step explanation:
This makes the most sense because of the position point C is at on the coordinate plane. It is above point D, which has a x-axis of 3. Option A is the only one that has an x-axis of 3.
Hope it helps!
Segments that intersect at 90° angles are called _____
Answer:
Perpendicular segments
Step-by-step explanation:
please help me with thisssss!!!!!!
Its either 2/5 or 4/5
Answer: The answer is 2/5 hope i helped! Mabye brainliest? ^^
Step-by-step explanation: if you can pick more than 1, pick 2/5 and 4/5
Jabari deposited $300 in a savings account. Each month thereafter, he deposits $20 into the account. Write a formula to represent this sequence. Begin you formula with an=
SOMEBODY PLEASE HELP ME!!!!
Answer:
So the perimeter of the larger rectangle = 160
Step-by-step explanation:
We are given the scale factor of the two rectangles. We are given the perimeter of the smaller rectangle = 120.
Since the two rectangles are scaled, this means they have a common ratio. In other words:
[tex] \frac{perimeter \: of \: larger \: rectangle}{perimeter \: of \: smaller \: rectangle} = \frac{4}{3} [/tex]
As given in the question.
Now we know the smaller rectangle has a perimeter of 120.
Let's take the perimeter of the larger rectangles as x.
[tex] \frac{x}{120} = \frac{4}{3} \\ \\ multiplying \: both \: sides \: by \: 120 \\ x = \frac{4}{3} (120) \\ x = 160[/tex]
So the perimeter of the larger rectangle = 160
What inverse operation should be used to isolate the variable in the equation j ÷ 12 = 50?
Answer:
600
Step-by-step explanation:
50x12=600 you can check this by doing 600/12=50
Answer:
multiplication
Step-by-step explanation:
by multiplying the variable, j, by 12 it isolates the variable.
I need help with these ASAP their due tonight and I have no idea what I’m doing
Answer:
8)RS=18
9)XY=6
10)Angle T=50
11)UE=22
12)SU=38
15)BS=16
I am SOOOOO sorry that I didn't answer 13 and 14, I couldn't really figure them out. :(
Step-by-step explanation:
the distance between the two points rounding to the nearest tenth
(-8,-6) and (-3,-4)
Answer:
5.4
Step-by-step explanation:
To find the distance between two points, [tex](x_1,y_1)[/tex] and [tex](x_2,y_2)[/tex], plug them into the following equation:
[tex]d=\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}\\d=\sqrt{(-3-(-8))^2+(-4-(-6))^2}[/tex]
Two negatives make a positive
[tex]d=\sqrt{(-3+8)^2+(-4+6)^2}\\d=\sqrt{(5)^2+(2)^2}\\d=\sqrt{25+4}\\d=\sqrt{29}\\d=5.4[/tex]
Therefore, the distance between the two points rounded to the nearest tenth is 5.4.
I hope this helps!
What is : -4x + 3 = -11
Answer:
3.5
Step-by-step explanation:
-11-3, then that divided by -4.
Write an equation in point-slope form of the line that passes
through the given points.
2,-2). (5.7)
Answer:
Step-by-step explanation:
(7 + 2)/(5 - 2)= 9/3= 3
y + 2 = 3(x - 2)
y + 2 = 3x - 6
y = 3x - 8
Factorise the following:
a) x + 3x - 4
b) x - 2x - 3
c) x + 2x - 8
what is the midpoint between (1,5) and (7,-3)
Answer:
(4,1)
Step-by-step explanation:
[tex]Midpoint=(\frac{x_{1}+x_{2}}{2},\frac{y_{1}+y_{2}}{2})\\[/tex]
[tex]=(\frac{1+7}{2},\frac{5-3}{2})\\\\=(\frac{8}{2},\frac{2}{2})\\\\=(4,1)[/tex]
what is the value of X?
since all sides are equal, which means all angles must also be equal to one another
all angles =60°
solving 7x-3=60
7x=63
x=9
similarly 11 y+5=60
11y=55
y=5
Can you answer number 6 please
Answer:
No, the triangles are not similar.
Step-by-step explanation:
For ΔNOP, since all triangles' angles equal 180°, to find the missing angle you subtract the given angles from 180
180-70=110, 110-58=52 ∠N = 52°
since ΔQRS does not have any angle measures of 58° or 52°, the triangles are not similar becasue similar triangles have congruent angles.
Please help me out fast. And make sure to Write and solve an inequality. Or it isn't right.
Answer:75x+160
8 is the answer exactly 8
Step-by-step explanation:
Answer:
Set variable d for number of days: 75d + 160 < 760; 75d < 600; d < 8. The van has to be rented for less than 8 days for the family to spend less than $760.
I already asked this but no one answer so I'm asking again what shape is this
Octagon!
I hope this answer helped! please rate 5 stars >:)
Answer:
That's an octagon since it has eight sides.
Can someone explain how to do this? Will mark as brainliest
Answer: x is the angle of the tricundicular angle of the imperfect triangle. It’s like area but it’s an imperfect triangle, there’s is also 2 different numbers that u should get from this
Step-by-step explanation: pls mark brainliest
4 radical 2 + 5 radical 6
Answer:
The question is quite literally the answer since they aren't the same kind, they can't be reduced anymore. Hope that helps!
Step-by-step explanation:
Which is an example of a function?
the price of a movie ticket and the height of the customer
the price of a piece of cloth and the length of the cloth
the time it takes to mow a lawn and the age of the person mowing the lawn
the distance to school and the time you spend at school
Step-by-step explanation:
the price of a piece of cloth and the length of the cloth
Convert 14% to an
equivalent decimal.
20 points! ill give brainiest if you explain
The percent increase from 18 to 26 is about __%.
Answer:44.44%
Step-by-step explanation:Take the absolute value of the difference fof the two and then divide by the first number: