Answer: 5 min
Step-by-step explanation:
Given
Length of the race track [tex]l=1\ km\ or\ 1000\ m[/tex]
Suppose the speed of Yohanne is [tex]v_y=x\ m/min.[/tex]
then Mikaela speed is [tex]v_m=50+x[/tex]
the difference in the finishing time is 1 minute i.e.
[tex]\Rightarrow \dfrac{1000}{x}-\dfrac{1000}{50+x}=1\\\\\Rightarrow \dfrac{50+x-x}{x(50+x)}=\dfrac{1}{1000}\\\\\Rightarrow \dfrac{50}{x(50+x)}=\dfrac{1}{1000}\\\\\Rightarrow x^2+50x-50,000=0\\\\\Rightarrow x^2+250x-200x-50,000=0\\\\\Rightarrow (x+250)(x-200)=0\\\\\Rightarrow x=200\ m/min.[/tex]
Time taken by Yohanne is
[tex]\Rightarrow t=\frac{1000}{200}=5\ min[/tex]
Danny charges $30 for 2 hours of swimming lessons, Martin charges $72 for 4 hours of swimming lessons. Who offers a better deal?
Answer:
Danny it 60 4 2 hours u save $12
What is the surface area of this cylinder?
Answer:
1067.6 m²Step-by-step explanation:
Given that
r = 10 mh = 7 mπ ≈ 3.14Find the surface area of the cylinder!
Equation =
2πr × (r+h) =(2 × 3.14 × 10) × (10 + 7) =
62.8 × 17 ≈
1067.6 m²The surface area of the cylinder ≈ 1067.6 square metres
_________________
#Indonesian - kexcvi
Answer:
Use this formula to calculate for the surface area of cylinder.
Step-by-step explanation:
A=2π r h+2 π r^2.
use r = 10 m and h = 7 m
2 (3.14) (10) 7 + 2 (3.14) 10 ^2. = 439.6 + 628 = 1067.6
round to the nearest hundredths = 1068
All of above help ...
If rectangle ABCD is reflected over x=3, does the area of the rectangle change? Explain
Answer:
Nope
Step-by-step explanation:
Rigid transformations don't change the area or perimeter of a shape.
2. Solve 3^4x-5 = (1/27)^2x+10 for x. Show your work
I know it equals around the negatives but that's it
It looks like the equation is supposed to read
3⁴ˣ ⁻ ⁵ = (1/27)²ˣ ⁺ ¹⁰
Recall that 3³ = 27, so 1/27 = 3⁻³ :
3⁴ˣ ⁻ ⁵ = (3⁻³)²ˣ ⁺ ¹⁰
Distribute the exponent on the right side:
3⁴ˣ ⁻ ⁵ = 3 ⁻⁶ˣ ⁻ ³⁰
The exponents must be equal for this equation to hold, so
4x - 5 = -6x - 30
Solve for x :
10x = -25
x = -25/10 = -5/2
Help!
Solve for the vaule(s) of b: b- 4.3 > 16.1
Answer:
b>20.4
Step-by-step explanation:
if 5 large potatoes are 1 kg how many potatoes are in 10 kg
Answer:
10 potatoes
Step-by-step explanation:
because if 1kg has 5 then 2kg will be double the amount.
hope this helps:>
Help I’ll give Brainly est
Answer:
2x is less than 8 or B
Step-by-step explanation:
When looking at the number line you got to look to see if the circle is closed or not. In this case it is a closed circle meaning to include the number. Then look at what direction it is going toward. Is it increasing? Is it decreasing? In this case it is decreasing. Meaning that 2x is less than 8
NOT A - Reason why it is not a is because 8 is not included in the range of numbers
NOT C
Parallelogram ABCD is a rectangle. What are the slopes of the sides that make this quadrilateral a rectangle?
-1/2 and 2
-2 and 1/2
.3 and 1/3
-1/3 and 3
Answer: -3 and 1/3
Step-by-step explanation:
There’s your answer
The tax rate is 8.5%. What is the tax on $95 round to the nearest hundredth
Answer:
8.075 original, rounded 8.01
Step-by-step explanation:
8.5%=0.085 x 95 = 8.075 or 8.01 rounded
what fraction of the whole garden is yellow bean plants?
Answer: :( 4/12
Step-by-step explanation: 75 % sure :( :(
answer:
first we multiply the 2 fractions together to get the fraction of yellow beans in the garden, then simplify the fraction
3/4×1/3=3/12=1/4
HELP giving brainlest and more points
Answer:
the answer is 7.2 10³
Step-by-step explanation:
7.2 10³
Plzzzz help me with this ASAP (100 points)
Answer:
7.5
Step-by-step explanation:
the answer to your question is 7.5
In circle E with m \angle DEF= 70m∠DEF=70 and DE=13DE=13 units find area of sector DEF. Round to the nearest hundredth.
Answer:
103.18units³
Step-by-step explanation:
Area of the sector DEF = theta/360 * πr²
r is the radius
theta is the angle subtended at the centre
theta =70 degrees
radius DE = 13units
Substitute
Area of the sector = 70/360 * 3.14(13)²
Area of the sector = 7/36 * 530.66
Area of the sector = 3,714.62/36
Area of the sector = 103.18units³ (to the nearest hundredth)
Answer: 103.24
Step-by-step explanation:
It cost $12 to attend a golf clinic with a local pro. Buckets of golf balls for practice during the clinic cost $3 each. Which inequality represents how many buckets (b) of golf balls can you buy with at least $30?
Which of the following transforms this non-statistical question into a statistical question? How much food does your dog eat?
Answer:
A) Not statistical /this question is answered by counting the number of days in March. This produces a single number. This number is not answered by collecting data that vary.
B) Not Statistical/ this question is answered by a single number. It is not answered by collecting data that vary.
C) Statistical/ this question would be answered by all collecting data, and there would be variability in that data.
D) statistical/ this question would be answered by collecting data, and there would be variability in that data
E) Not Statistical/ this question is answered by a single response. It is not answered by collecting data that vary.
F) not statistical/ this question would be answered by counting the bricks. This produces a single number. This question is not answered by collecting data that very
G) non-statistical/ there is only one temperature
Answer:I think it’s possibly A it’s what I got on my test and got it right.
HELP! What is equivalent to (8.4z+2.5)+(-3.7x+5
Answer: -21x + 32z + 15
Step-by-step explanation:
Can somebody help me with this math question, all you have to do is answer the equation, then it's described, and then it draw it out I'll give you 100 points and a Brainliest
___________________________________
[tex]\huge\underline{\tt{\red{Solution:}}}[/tex]
[tex]\quad\quad\quad\quad\tt{⟶- 3(5x + 6) - 3x = 6 - 6x}[/tex]
[tex]\quad\quad\quad\quad\tt{⟶(-15x - 18) - 3x = 6 - 6x}[/tex]
[tex]\quad\quad\quad\quad\tt{⟶( - 15x - 3x)- 18 = 6 - 6x}[/tex]
[tex]\quad\quad\quad\quad\tt{⟶( - 18x)- 18 = 6 - 6x}[/tex]
[tex]\quad\quad\quad\quad\tt{⟶( - 18x) + 6x = 6 + 18}[/tex]
[tex]\quad\quad\quad\quad\tt{⟶-12x = 24}[/tex]
[tex]\quad\quad\quad\quad\tt{⟶\frac{-12x}{-12} = \frac{24}{-12} }[/tex]
[tex]\quad\quad\quad\quad\tt{ ⟶\frac{ \cancel{ \red{-12}} \: x}{ \cancel{ \red{-12}}} = \frac{24}{-12} }[/tex]
[tex]\quad\quad\quad\quad ⟶\boxed{\tt{x = -2}}[/tex]
[tex]\huge\underline{\tt{\red{Answer:}}}[/tex]
[tex] \huge\quad\quad \underline{\red {\boxed{ \tt{x = -2}}}}[/tex]
___________________________________
#CarryOnLearning
✍︎ C.Rose❀
Josie watches a play at the theatre.
The play ends at 9:55 pm.
It takes Josie 15 minutes to get from her seat in the theatre to the bus stop.
Buses to Josie's home leave the bus top at the following times
18:25
19:25
20:25
21:05
21:25
22:05
22:25
a)
Write down the time of the earliest bus that Josie can catch.
b) How long will Josie have to wait at the bus stop for, if she catches the
earliest possible bus?
Answer:
22:25
She will wait for 15 min
Step-by-step explanation:
9:55 is 21:55 in 24h time
after 15 min it will be 22:10
the closest time will be 22:25
25-10 is 15
15 min waiting
Please help its due soon!!
Answer:
expand from what expression?
Answer:
a, b, c and d stay the same.
e = 108[tex]y^{3}[/tex]
f = [tex]x^{3} + x + 8[/tex]
That's all.
I hope it helps!! ^-^
PLZ HELP ASAP I RLLY NEED THE HELP
Answer: just do 10.8×9×6 and divide the answer by two
Step-by-step explanation:
Answer:
the area is 27
Step-by-step explanation:
[tex]9 \times 6 \div 2 = 27[/tex]
Through:(2,-5),slope=3/2
The points (0, 0), (–3, 3), and (0, 6) are three vertices of a square. What are the coordinates of the fourth vertex of the square?
Answer:
(3,3)
Step-by-step explanation:
factor the expression pls! 35-40x
Answer:
5(7-8x)
Step-by-step explanation:
Answer:
it will be 5 (7 - 8x)
Step-by-step explanation:
5 times 7 is 35 and 5 times 8 is 40
factor the polynomial
4x^2 + 12 + 9
Answer:
The answer is [tex](2x+3)^2[/tex].
Step-by-step explanation:
Multiply the coefficient of the squared term and the constant. Then, find the factors that add up to 12:
[tex]4*9=36\\36:\{1*36,2*18,3*12,4*9,6*6\}\\6+6=12[/tex]
Split the middle term:
[tex]4x^2+6x+6x+9[/tex]
Factor by grouping:
[tex][4x^2+6x]+[6x+9]\\2x(2x+3)+3(2x+3)\\(2x+3)(2x+3)\\(2x+3)^2[/tex]
Write a fraction for each percent.
75% of 96
Answer:
72/96
Step-by-step explanation:
what is the lcm of 24,30 and 36 ....pls do a step by step
The lenght of a rectangle is 2 units more than the width. The area of the rectangle is 48 units. What is the length, in units, of the rectangle?
Answer:
The length of this rectangle is 6 units.
Step-by-step explanation:
Let the width of the rectangle be x.
x • (x+2) = 48
x^2+2x=48
x^2+2x-48=0
x^2 - 6x + 8x - 48
x(x-6) 8(x-6)
(x+8)(x-6)
x=-8,6
Answer:
6+2=8 units..............
Hiram asked his math class, "How many pets do you own?" He graphed the results on the line plot.
Which of the following is the BEST description of the data?
A.The mean is about 3.1; there are no gaps or outliersa peak at 2; and the data is not symmetrical.
B. The median is 2.5; the distribution is symmetrical; and there are no gaps or outliers.
C.The range is 7there is a peak at 5; and 6, 7and are outliers
D. The mode is 2; the data is skewed to the right; and there is a gap from 3-4
Answer:
B The median is 2.5; the distribution is symmetrical; and there are no gaps or outliers.
Step-by-step explanation
when I find the median it gets to 2, 3 so I get 2.5 no gaps and 0-7 isn't that far
Answer:
B
Step-by-step explanation:
Help meeeee pweaassee!!
Answer:
7. divide both sides by 18.
8. subtract 4 from both sides.
9. add 3 on both sides.
10. multiply by 6 on both sides
Hope that helps! :3
Step-by-step explanation: