17. A man can row at 8 km/hr in still water. If the
river is running at 2 km/hr, it takes him 48
minutes to row to a place and coming back. How
far is the place ?
(a) 1 km
(b) 2 km en
(c) 3 km
(d) 4 km
Answer:
(c) 3 km
Step-by-step explanation:
Speed in still water: 8 km/h
Speed of river: 2 km/h
Speed downstream: 8 km/h + 2 km/y = 10 km/h
Speed upstream: 8 km/h - 2 km/h = 6 km/h
total time both ways: 48 minutes = 48/60 hour = 0.8 hour
time to go upstream: t
time to go downstream: 0.8 - t
speed = distance/time
s = d/t
d = st
Upstream:
d = st
d = 6t
Downstream:
d = st
d = 10(0.8 - t)
The distance upstream and downstream is the same.
6t = 10(0.8 - t)
6t = 8 - 10t
16t = 8
t = 0.5
d = 6t = 6(0.5)
d = 3
Answer: (c) 3 km
i dont get this question.
f 4 boxes of apples weigh 75.6 lb, how much do 8.5 boxes of apples weigh?
Answer:
160.65 lb
Step-by-step explanation:
4*18.9 = 75.6 lb
8.5*18.9 = 160.65 lb
Simplify and write your
answer in standard form
5x(-3x + 8) - 4x + 7
Answer:
-15x^2 + 36x + 7
Step-by-step explanation:
Answer:
Step-by-step explanation:
-15x^2 + 40x - 4x + 7
-15x^2 + 36x + 7
What is the missing coefficient?
x2 + 4x
+
2x
x2 + x
please help me
I need helpppp with this question
Answer: Y = 6 and X = 5
Step-by-step explanation: Im not sure But i think that that your supposed to subtract by 2 so 8 - 2 would equal 6 and then 7-2 equals 5 so yeah
1. Diquan bought a shirt for $20 and paid 10% in sales tax. What was total cost of
the shirt
Answer:
22 dollars
Step-by-step explanation:
20/10=2 dollars + 20= 22
What equation can Janet use to calculate the principal amount? (and please don't just answer try to solve it someone ripped me off, the last time i asked by just typing)
Answer:
t = [tex]\frac{l}{pr}[/tex]
Step-by-step explanation:
Formula or literal equation used to calculate the simple interest is,
l = prt
where 'l' = Simple interest
p = principle amount invested
r = rate of interest
t = time or duration of the investment
If we have to calculate the time of investment form the given formula,
l = prt
By the division property of equality,
[tex]\frac{l}{pr}=\frac{prt}{pr}[/tex]
[tex]t=\frac{l}{pr}[/tex]
Therefore, formula to be used is, [tex]t=\frac{l}{pr}[/tex]
1,221 kids signed up for summer baseball. If the league has 32 teams and split the kids up evenly among the teams, how many kids would be placed on each team? Select the best response from below.
Answer:
38 kids on each team about.
I am Not 100% sure but I hope this Helps!
So D.
12 POINTS I NEED SOMEONES HELP BEFORE THIS DAY FINISHES
A town has a population of 2000 and grows at 4% every year. Write an
equation to represent the scenario
Answer:
2000+ (2000× .04x)
Step-by-step explanation:
2000 people plus the percent that it grows, found by multiplying .04 (4%) by the original number. the x is the number of years
Ben’s age, x, is 3 times his age 12 years ago. Finish the equation, using no spaces
Given :
Ben's age x is 3 times his age 12 years ago.
To Find :
The current age of Ben.
Solution :
It is given that current age of Ben is x.
So, his age 12 years ago is (x - 12).
Expressing given condition mathematically , we get :
[tex]x=3(x-12)\\\\x=3x-36\\\\2x=36\\\\x=18\ years[/tex]
Therefore, current age of Ben is 18 years.
Hence, this is the required solution.
Ming made a triangular picture frame out of cardboard. The sides of the frame are 6.75 in., 6.75 in., and 8.375 in. Ming uses the addition below to determine the amount of string she needs to decorate the edges of the frame.
675 + 675 + 8.375 = 9.725. The 675 values are lined up with the 375 portion of 8.375.
Which explains Ming’s error?
Answer:
She should have included the decimal in 6.75 and aligned the decimal points to add 6.750 + 6.750 + 8.375 = 21.875.
Step-by-step explanation:
6.750
6.750
+ 8.375
21.875
I hope this helps
Answer:
The answer is A
Step-by-step explanation:
I took the test
Andrea is selling candles for a fundraiser. She spent $50 on supplies for making the candles. She plans to sell the
candles for $10 each. The function of her profit can be modeled by c(x) = 10x - 50. The x represents the number
of candles she makes. She only has enough supplies to make 100 candles. What is the independent variable?
Solye for x
7(x + 1) = 21
Answer:
x = 2
Step-by-step explanation:
Given
7(x + 1) = 21 ( divide both sides by 7 )
x + 1 = 3 ( subtract 1 from both sides )
x = 2
Answer:
x=2
Step-by-step explanation:
7×(x +1)=21
7x +7 =21
7x =21 - 7
7x =14
x=14 :7
x=2
7 ×(2 +1)=21
7 ×3 =21
21 =21
5 (n - 14) =2 (n + 14)
Answer:
n= 98/3
Step-by-step explanation:
1. Complete distributive property *5(n-14)* and *2(n+14)*
5n-70=2n+28
2. Subtract 5n from both sides
-70=-3n+28
3. Subtract -70 from both sides
-98=-3n
4. Divide the variable from both sides *-3n*
-98/-3
5. Simplify
98/3
Final Answer:
98/3
Neena is listening to a song. It has a consistent beat. She counts 11 beats in
1 seconds. What is the constant of proportionality for the relationship of beats
to minutes? Show your work.
Answer:
11beats / 1 second = 660 beats /1 minute
Hailey makes a necklace with 24 blue beads and 32 purple beads. She wants to make a bracelet that uses the same ratio of blue beads to purple beads. She plans to use 6 blue beads for the bracelet. How many purple beads should Hailey use
Answer:
8
Step-by-step explanation:
Ratio of blue beads to purple: 24:32
Reduce it using four and it becomes 6:8
What is 1 x 10^3 in standard form? Show work of how you did it please :)
Answer:
1×10^3 = 1000
Step-by-step explanation:
so basically its 1×10×10×10
The standard form of the given scientific notation is 1000.
The given scientific notation is 1×10³.
What is the standard form of a number?The standard form means the process of writing very large expanded form of a number into small form or small number.
Now, the standard form of 1×10³ is
1×1000
= 1000
Therefore, the standard form of the given scientific notation is 1000.
To learn more about the standard form of a number visit:
https://brainly.com/question/13139379.
#SPJ2
question 7 pls help i need help pls
Answer:
112
Step-by-step explanation:
m<pmo + m<qmn = m<pmn 90+22=112
Answer:
112
Step-by-step explanation:
add 90 and 22
-(2m-7)-(3+4(m+4)) Solve PLZZZZ HURRYY 20 POINTS
Answer:
-6m-12
Step-by-step explanation:
-(2m-7)-(3+4(m+4)) =
-2m+7-(3+4m+16)=
-2m+7-(19+4m)
-2m+7-19-4m
-6m-12
OR:
-m-2 ( if you divide by 6 as a common factor)
Which relation represents a function?
1) {(0,3),(2,4),(0,6)}
2) {(-7,5),(-7,1),(-10,3), (-4,3)}
3) {(2,0),(6,2),(6,-2)}
4) {(-6,5),(-3,2),(1,2),(6,5)}
g(a) = a + 2. Find f(-7).
Answer:
Step-by-step explanation:
g(-7) = -7 + 2 = -5
Solve for x.
[tex]3x - 5 = \frac{12 + 4x}{2} [/tex]
x = [?]
Answer:
x= 11
Step-by-step explanation:
[tex]3x - 5 = \frac{12 + 4x}{2} [/tex]
Multiply both sides by 2:
2(3x -5)= 12 +4x
Expand:
2(3x) +2(-5)= 12 +4x
6x -10= 12 +4x
Bring all x terms to 1 side, constant to the other:
6x -4x= 10 +12
2x= 22
Divide by 2 on both sides:
x= 22 ÷2
x= 11
If x represents a number then write an expression for a number that is three more than one third the value of x
Answer:
1/3x+3
It is asking for 1/3 of x which is 1/3x
three more essentially means add 3
So 1/3x+3 is the answer
The expression is,
y = 1/3x+3
Where, y is number write with the help of x
And, x is a number.
Here,
We have to write an expression for a number that is three more than one third the value of x.
What is Number system?
A system of writing to express the number is called Number system.
Now,
x represents a number.
Let a number y which is written as, three more than one third the value of x.
One third of x = 1/3 x
Then, more than 3 means to add 3, we get
y = 1/3 x + 3
Hence, The expression is,
y = 1/3x+3
Where, y is number write with the help of x
And, x is a number.
Learn more about the number system visit:
https://brainly.com/question/11966194
#SPJ2
1 point
If an original amount was 12 and the new amount is 18, would you describe
this as an increase or decrease? *
Answer: Increase
Step-by-step explanation: 18 is greater than 12
Which of the following problems can be represented by the equation below? 5x - 15 = 15x
Answer:
6
Step-by-step explanation:
5x-15=15x
+15 +15
5x=30
5/5=1
30/5=6
1=6 or x=6
Solve this
equation for m
y = mx + b
Answer:
m is represented as the slope
Step-by-step explanation:
can you give me a real-world problem that involves multiplying a fraction and a whole number?
Answer:
Rishi spent 3/4 of an hour for 2 days working on his science project . kyle spent 1/4 of an hour for 6 days working on his science project. who spent more time working on his science project.
Step-by-step explanation:
rishi and kyle spent the same amount of time.
6/4 and 6/4 hours
Which pair of segments are corresponding parts of the congruent quadrilaterals that are pictured below?
A. AB and WX
B. AB and XY
C. AB and YZ
D. AB and ZW
Hurry please!!!
Answer:
AB and ZW
Step-by-step explanation:
if you see the marks on the edges of the Square, you see they have different number of marks. if 2 segments are congruent, they will have the same number of marks on the sides. AB and WX have 3 marks on their side
Answer:
The answer is simply d i did the unit review on edge plz mark me brainliest
Step-by-step explanation:
A square garden has an area of 1,600 square feet. How long is each side of
the garden?
16
40
80
160
Answer:
40
Step-by-step explanation:
why? because 40x40=1600