Answer:
Current speed is 40mph
Step-by-step explanation:
We firstly need to know what is intended by upstream and downstream. When the boat travels in the direction of the current (horizontal movement of the water), we say it is moving downstream otherwise it is moving upstream.
Let's assume the speed of the boat is A and that of the current is B, then the speed when it moves dowstream would be A + B and the speed if it moves upstream would be A – B.
In this question, we know that the speed of the boat is 40mph. Given that it takes the same time to travel 8miles upstream as it does to travel 24miles downstream, we have
Speed upstream = 8/t
Speed downstream = 24/t
Respectively.
Let speed of current be X, then
Speed downstream = 40 + X
Speed upstream = 40 – X
From the question we have:
(40 + x)/24 = (40 – X)/8
(40 + x)/3 = (40 – x)/1
3(40 – x) = 40 + X
120 – 3x = 40 – X
120 – 40 = 3x – X
2x = 80
X = 40.
Therefore, current speed is 40mph
pls help me i will mark the brainlyiest thingg if you get it right
Answer:
(3x+6) degrees+(5x+4) degrees equals 90 degrees
Step-by-step explanation:
Answer:
try 3x+6+5x+4=90
sorry if it's wrong
What is the discount given on a jacket that was originally priced $90 and is now $72?
Answer:
Step-by-step explanation:
The disCount will be the differenceb
A bakery offers a sale price of $2.70 for 3 muffins. What is the price per dozen? The price per dozen muffins
Answer:
Step-by-step explanation:
i think your asnwer would be 14 dollers but im not to sure
hope this helps
i am so sorry if i am wrong
how many solutions does this system of equations have ? PLZ HELP ASAP DUE AFTER CLASS !
Answer:
No Solution
Step-by-step explanation:
For system of equations, you must equal the equations to each other like shown below:
[tex]3x + 1 = 3x + 7[/tex]
Solve for x by subtracting 3x from both sides of the equation:
[tex]1[/tex] ≠ [tex]7[/tex]
18. On Faith's math test, she received
a 85%. If there were 40
questions on the test, how many
did she get right?
Answer: 40/10=4
That means 10% of 40 is 4.
Know that means you have to times 4 by 8
4x8=32
Now you know what 80% of 40 is.
Now we need to know what the 5% is. So if 4 is 10% . 5% must be 2.
Next we have to add 2 to 32.
32 + 2 = 34
Answer is 34
Step-by-step explanation:
What is a secure line of credit?
Answer:
A secured line of credit means you're promising an asset like real estate or a savings account as collateral in case you don't pay back what you owe. With an unsecured line of credit, you don't have to put down an asset as collateral to secure the loan.
Whatcha table shows a proportional relationship?
p 1 3 5 7 9
q 0 2 4 6 8
—————-
b 1 4 5 7 11
c 3 12 15 21 33
——————-
r 3 6 10 12 15
s 2 4 6 8 10
——————
x 1 2 3 4 5
y 9 10 11 12 13
Answer:
The answer is the second table (the one with B and C.)
Step-by-step explanation:
You know this, because the other tables are just based on patterns and the x and y values have nothing to do with each other. However, for the second table, the b value times 3 equals the c value. This is how you know the table shows a proportional relationship, and this is key to solving this problem.
Here's an image that helps demonstrate this idea:
khan sucks 3 for 30 points
again
Answer:
D, John did not make a mistake!
Step-by-step explanation:
Find the missing dimension.
The missing dimension is
inches.fill in the blank
Answer:
H= 11
Step-by-step explanation:
231 = h x 7 x 3
231 = 21h
/21 /21
H=11
Answer:
11
Step-by-step explanation:
500 meters divided by 10 days
Answer:
50 meters per day
Step-by-step explanation:
Answer:
50
Step-by-step explanation:
i think but ur question doesnt make sen
sup my guys.
simplify.
12/232 x 24/127 =
Answer:
36/3683
Step-by-step explanation:
a sphere has a volume of 4500 cubic inches. What is the radius off the shpere
Answer:
The radius of sphere with volume 4500 cubic inches is 10.24 inches.
Step-by-step explanation:
Let V be the volume of the sphere
Given
Volume of sphere = V = 4500 cubic inches
Let r be the radius of the sphere
The volume of the sphere is given by the formula
[tex]V = \frac{4}{3}\pi r^3[/tex]
Putting the known values
[tex]4500 = \frac{4}{3} * \frac{22}{7} * r^3\\4500 = \frac{88}{21} * r^3\\r^3 = \frac{21}{88} * 4500\\r^3 = 1073.8636[/tex]
Taking cube root on both sides
[tex]\sqrt[3]{r^3} = \sqrt[3]{1073.8636} \\r = 10.2403[/tex]
Rounding off to nearest hundredth
The radius is: 10.24 inches.
Hence,
The radius of sphere with volume 4500 cubic inches is 10.24 inches.
Susanna purchased a shirt for $5, pants for $10, and a jacket for $25. She wants to buy at least one purse for the outfit, but she wants to have something left of her original $65. How much money might she spend on the purse?
Answer:
$15 dollars left after you purchased everything except the purse.
Step-by-step explanation:
5+10+25=40
65-40=15
if you have $15 left it depends on how much the purse costs.
Say it costs $10 dollars you would have $5 left and so on
How do i find what to put into the boxes??
((12 / 3^2) - (18 / 3^2)) x (4 / 2)
Answer:
−4/3
or -4/3x
or (Decimal: -1.333333)
Step-by-step explanation:
GIVING BRAINLIEST TO WHOEVER GETS QUESTION 8 AND 9 RIGHT!!
Answer:
1 toonie 1 quarter 1 dime
2 loonies 1 quarter 2 dimes 1 nickel
Step-by-step explanation:
Answer:
C
none of the others are correct for 9
Step-by-step explanation:
Which method would be appropriate to factor the polynomial below. 55x^3-40x^2 -Difference of Squares -Basic Trinomial Factoring -AC Method -Sums of Cubes -Greatest Common Factor -Factors by grouping
Answer:
Greatest Common Factor
Step-by-step explanation:
Let [tex]55\cdot x^{3}-40\cdot x^{2}[/tex], we proceed to demonstrate the appropriate form to factor the polynomial:
1) [tex]55\cdot x^{3}-40\cdot x^{2}[/tex] Given.
2) [tex](5\cdot 11)\cdot (x^2\cdot x) +[5\cdot (-8)]\cdot x^{2}[/tex] Definition of multiplication and subtraction/[tex]a^{b+c} = a^{b}\cdot a^{c }[/tex]/[tex]-a\cdot b = (-a)\cdot b[/tex]/Associative property
3) [tex](5\cdot x^{2})\cdot (11\cdot x)+ (5\cdot x^{2})\cdot (-8)[/tex] Commutative and associative properties
4) [tex]5\cdot x^{2}\cdot (11\cdot x-8)[/tex] Distributive property/Definition of subtraction/Result
Hence, we conclude that this polynomial can be factored by Greatest Common Factor.
is y = 1 3 x a proportional relationship
Answer:
Yes
Step-by-step explanation:
Which table shows the amount of a substance decaying at an exponential rate?
Answer:D
Step-by-step explanation:
Just trust
CAN SOMEONE PLEASE HELP ME AND TYSM IF YOU DO!!
Answer:
yes it's proportional
Step-by-step explanation:
A bacteria colony started with 2 bacteria. The colony is growing exponentially at 10% per hour. How long will it take to have 1 million bacteria?
Answer:
the time taken for having 1 million bacteria is 137.68 hours
Step-by-step explanation:
The computation is shown below:
y = 2 × (1.10)^x
1,000,000 = 2 × (1.10)^x
500,000 = (1.10)^x
x = log (500,000) ÷ log (1.10)
= 137.68 hours
hence the time taken for having 1 million bacteria is 137.68 hours
please answer this question
Answer:
B
Step-by-step explanation:
trust me 100% sure
16.Speedy Rentals charges $300 per month to rent a car plus an initial deposit of $500. Thrifty Rentals charges $200 per month to rent a car plus an initial deposit of $1,000. (a)If you wanted to rent a car for 4 months, which company's cost would be lower? (b)For how many months would you have to rent a car for the price to be the same for both companies?
Answer:
A: Speedy Rentals is $100 cheaper if you only rent a car for 4 months
B: If you rented a car for 5 months then both places woulb be the same amount
Step-by-step explanation:
2] The band has a ratio of boys to girls of 5 to 4. There are 171 students in the band.
(Make sure to write out in words first)
How many are boys?
How many are girls?
Give work for each
9514 1404 393
Answer:
There are 95 boys.There are 76 girls.Step-by-step explanation:
The fraction that is boys is 5/(5+4) = 5/9. That fraction of the total is ...
boys = 5/9 × 171 = 95
Girls are the remainder:
girls = 171 -95 = 76
There are 95 boys and 76 girls in the band.
please help me out with this question!!
show your work!!
What is the slope of the line shown below?
Answer:
[tex]m = \frac {1}{4}[/tex]
Step-by-step explanation:
Slope formula
[tex]m=\frac{y_2-y_1}{x_2-x_1}[/tex]
Here
[tex](x_1, y_1) = (-3, -1) \ \ and \ \ (x_2, y_2)= (5, 1)[/tex]
Slope can be calculated as
[tex]m = \frac{1-(-1)}{5-(-3)}[/tex]
[tex]m = \frac{2}{8} \\m = \frac {1}{4}[/tex]
Consider the following Function:
F(x)= 7x-9
If the output is 26, what is the input?
★ Input of the given function F(x) is 5.
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
• Given:-✯ F(x) = 7x - 9
✯ Output = 26
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
• Solution:-According to the question the output is 26.
Hence, the above data can be written in an equation form.
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
➪ F(x) = 7x - 9 = 26
➪ 7x = 26 + 9
➪ 7x = 35
➪ [tex]\sf x = \dfrac{35}{7}[/tex]
➪ [tex]\bold\red{x = 5}[/tex]
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
Therefore, F(x) = 5
If x +9= 2, then x + 9 - 9 = 2 - 9
Answer: The answer is -16
x= -7
Step-by-step explanation:
now that you know the value of x, rewrite the equation, if -7 + 9=2, then -7 + 9 - 9 = 2 -9. now that its easier to understand, add and subtract to get you answer, -16
y = x+3 Solve by substitution. 2x + y = -6 What is the solution?
Answer: x= -1/2y-3
Step-by-step explanation:
Your laptop battery will last for exactly 6 hours before it needs to be recharged.You have had your laptop on for
2 1/2. What fraction of your battery life remains.
Answer:
[tex]3\frac{1}{2} hours[/tex]
Step-by-step explanation:
You have to subtract 2 1/2 from 6 and that will equal 3 and 1/2.
Answer:
75%
Step-by-step explanation:
6 - 3/2 is 4.5.
So the computer has 4.5 hours.
the battery will last for 6 hours so every hour on the computer is 100/6 percentage, which is 16.6666666667.
Finally multiply 16.6666666667 and 4.5 and you will get 75%
Your final answer would be 75%
Hope it helps
Pls mark brainliest