Answer:
$7.79
Step-by-step explanation:
Because if he bought 5 units divide 39.95 by 5 to get unit price :)
16.76 divided by 0.2
Answer:
83.8
Step-by-step explanation:
I need help with this question. I think the answer is top right.
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!40 POINTS!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Solve for the value of y. (write your answer in the text space as just a number) *
Answer:
15
Step-by-step explanation:
Express the following in scientific notation: 10,030,400,000
a. 1.00304 x 109
b. 1.00304 x 1010
c. 1.00403 x 1010
d. 1.00304 x10-10
Answer:
1.00304 x 10^10
plz mark brainliest if helpful
If f(x) = 3x + 10x and g(x) = 5x - 3, find (f - g)(x).
A. 3X + 5x + 3
B. 3x - 5x+3
C. 3X + 15x - 3
O D. 18x - 3
Answer:
Answer=bbbbbbbbbbbbbb
Hey can someone be nice enough to help me
Answer:true
Step-by-step explanation:
Answer:
Its true.
Step-by-step explanation:
You add them
7) Bilangan bilangan kelipatan 40 adalah ... *
80, 120, 160, ...
80, 120, 180, ...
80, 100, 160,
O 80, 120, 140,
Answer:
80, 120, 160, ...
Step-by-step explanation:
Karena semua bilangannya bisa dibagi 40.
Multiply (-3) by (+1.4).
Answer:
-3*+1.4=-4.2
Step-by-step explanation:
it may help you to understand
Rewrite 1/4 barrel over 2/3 hour as a unit rate
Answer:
3/8 barrel/hour
Step-by-step explanation:
Estimate the area under the graph of f(x)=x^(2)+3x from x=1 to x=5 using 4 approximating rectangles and left endpoints.
Answer:
Rn ≈ 0.6345
Ln ≈ 0.7595
Step-by-step explanation:
The interval from -1 to 2 has a width of (2 -(-1)) = 3. Dividing that into 4 equal intervals means each of those smaller intervals has width 3/4.
It can be useful to use a spreadsheet or graphing calculator to evaluate the function at all of the points that define these intervals:
x = -1, -.25, 0.50, 1.25, 2
Of course, the spreadsheet can easily compute the sum of products for you.
__
The approximation using right end-points will be the sum of products of the interval width (3/4) and the function value at the right end-points:
Rn = (3/4)f(-0.25) +(3/4)f(0.50) +(3/4)f(1.25) +(3/4)f(2)
Rn ≈ 0.6345
__
The approximation using left end-points will be the sum of products of the interval width (3/4) and the function value at the left end-points:
Ln = (3/4)f(-1) +(3/4)f(-0.25) +(3/4)f(0.50) +(3/4)f(1.25)
Ln ≈ 0.7595
_____
It is usually convenient to factor out the interval width, so only one multiplication needs to be done: (interval width)(sum of function values).
Step-by-step explanation:
Rn ≈ 0.6345
Ln ≈ 0.7595
Step-by-step explanation:
The interval from -1 to 2 has a width of (2 -(-1)) = 3. Dividing that into 4 equal intervals means each of those smaller intervals has width 3/4.
It can be useful to use a spreadsheet or graphing calculator to evaluate the function at all of the points that define these intervals:
x = -1, -.25, 0.50, 1.25, 2
Of course, the spreadsheet can easily compute the sum of products for you.
__
The approximation using right end-points will be the sum of products of the interval width (3/4) and the function value at the right end-points:
Rn = (3/4)f(-0.25) +(3/4)f(0.50) +(3/4)f(1.25) +(3/4)f(2)
Rn ≈ 0.6345
__
The approximation using left end-points will be the sum of products of the interval width (3/4) and the function value at the left end-points:
Ln = (3/4)f(-1) +(3/4)f(-0.25) +(3/4)f(0.50) +(3/4)f(1.25)
Ln ≈ 0.7595
_____
It is usually convenient to factor out the interval width, so only one multiplication needs to be done: (interval width)(sum of function values).
Which of the following expressions is equivalent to (x + 5) ^2
Please someone help and explain them to me. im confused
is there a way i can draw on it to help explain it?
help any tutor help
Suppose that a large mixing tank initially holds 500 gallons of water in which 50 pounds of salt have been dissolved. Another brine solution is pumped into the tank at a rate of 3 gal/min, and when the solution is well stirred, it is then pumped out at a slower rate of 2 gal/min. If the concentration of the solution entering is 4 lb/gal, determine a differential equation for the amount of salt A(t) in the tank at time
t > 0.
(Use A for
A(t).)
I got 6-(2A/t+500) Im not sure if the 6 is right the rate part since on another one the concentration entering was 2 lb/gal not 4 lb/gal
Answer:
The differential equation for the amount of salt A(t) in the tank at a time t > 0 is [tex]\frac{dA}{dt}=12 - \frac{2A(t)}{500+t}[/tex].
Step-by-step explanation:
We are given that a large mixing tank initially holds 500 gallons of water in which 50 pounds of salt have been dissolved. Another brine solution is pumped into the tank at a rate of 3 gal/min, and when the solution is well stirred, it is then pumped out at a slower rate of 2 gal/min.
The concentration of the solution entering is 4 lb/gal.
Firstly, as we know that the rate of change in the amount of salt with respect to time is given by;
[tex]\frac{dA}{dt}= \text{R}_i_n - \text{R}_o_u_t[/tex]
where, [tex]\text{R}_i_n[/tex] = concentration of salt in the inflow [tex]\times[/tex] input rate of brine solution
and [tex]\text{R}_o_u_t[/tex] = concentration of salt in the outflow [tex]\times[/tex] outflow rate of brine solution
So, [tex]\text{R}_i_n[/tex] = 4 lb/gal [tex]\times[/tex] 3 gal/min = 12 lb/gal
Now, the rate of accumulation = Rate of input of solution - Rate of output of solution
= 3 gal/min - 2 gal/min
= 1 gal/min.
It is stated that a large mixing tank initially holds 500 gallons of water, so after t minutes it will hold (500 + t) gallons in the tank.
So, [tex]\text{R}_o_u_t[/tex] = concentration of salt in the outflow [tex]\times[/tex] outflow rate of brine solution
= [tex]\frac{A(t)}{500+t} \text{ lb/gal } \times 2 \text{ gal/min}[/tex] = [tex]\frac{2A(t)}{500+t} \text{ lb/min }[/tex]
Now, the differential equation for the amount of salt A(t) in the tank at a time t > 0 is given by;
= [tex]\frac{dA}{dt}=12\text{ lb/min } - \frac{2A(t)}{500+t} \text{ lb/min }[/tex]
or [tex]\frac{dA}{dt}=12 - \frac{2A(t)}{500+t}[/tex].
I need help with this question
Find the value(s) of x such
that g (x) = 4
You have $200 in a savings account and $100 in a checking
account. Each week, you add $50 to your savings account and $30 to your
checking account. how much money do you have in both accounts after 5 weeks
Answer:
S= 450 C=250 both=$700
Step-by-step explanation:
S=200+50w
C=100+30w
w=5
Is anyone willing enough to answer this question
Answer:
y = (x) × 120
Step-by-step explanation:
I just did 60 divided by .5 and got 120.
I tried multiplying each input by 120 and it worked.
six more than nine times a number is -7
Which number represents the sum of -8 and -i?
Answer:
C (-8-i)
Step-by-step explanation:
The sum of the -8 and -i will be option C. (-8-i).
What is sum?
In mathematics, the sum can be defined as the result or answer we get on adding two or more numbers or term.
So here we need to calculate the sum of -8 and -i. For this, we will do a sum operation.
[tex]Sum = (-8)+(-i)[/tex]
As we know that minus and plus together become minus so
[tex]Sum= -8-i[/tex]
Hence the sum of the -8 and -i will be option C. (-8-i).
To know more about Sum follow
https://brainly.com/question/17695139
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Do you know The answer for If R is the midpoint of QS, QR =8x - 51 and RS = 3x - 6 find QS
Answer:
QS = 42Step-by-step explanation:
R is midpoint
|<---------------- QS -------------------->|
Q---------------------R--------------------S
8x - 51 3x - 6
find: QS
QR = RS
8x - 51 = 3x - 6
8x - 3x = 51 - 6
5x = 45
x = 45/5
x = 9
QS = QR + RS
QS = (8x - 51) + (3x - 6)
plugin the value of x=9 into the equation above:
QS = (8(9) - 51) + (3(9) - 6)
QS = 72 - 51 + 27 - 6
QS = 42
ਇਕ ਐਕਸੈਲ ਵਰਕਬੁੱਕ ਵਿੱਚ ਹੁੰਦੀਆ ਹਨ
Answer:
Cannot understand, please translate
Step-by-step explanation:
whats is the answer to 1+1x3x4
Answer:
13?
Step-by-step explanation:
1+1x3x4
1+1x12
1+12
13
Enter the exponential decay function using t (for time) as the independent variable to
model the situation. Select the graph of the function. Enter the function's domain and
range. Then complete the explanation of what the y-intercept represents in the context of
the problem. If necessary, round to the nearest penny.
The value of a couch is decreasing at a rate of 6.3% per year. In 2007, the couch was worth
$1,232. Find the value of the couch in 2014.
Answer:
The decay function is [tex]y(t)=a(1-r)^{t}[/tex]
The graph is attached down
The domain is {t: t ≥ 0}
The range is {y: y > 0}
The y-intercept represents the initial value of the couch
The value of the couch in 2014 is $781.25 to the nearest penny
Step-by-step explanation:
The form of the decreasing exponential function is [tex]y=a(1-r)^{x}[/tex], where
a is the y-intercept ⇒ initial amountr is the rate of in decimaly is the dependent amountx is the independent amount∵ The value of a couch is decreasing at a rate of 6.3% per year
∴ [tex]y(t)=a(1-r)^{t}[/tex]
∴ y represents the amount of money
∴ t represents the number of years
∴ r = 6.3% = 6.3/100 = 0.063
∵ In 2007, the couch was worth $1,232
∴ The initial value is $1,232
∴ a = 1,232
∵ We need to find the value of the couch in 2014
∴ t = 2014 - 2007 = 7 years
→ Substitute the values of a, r, and t in the function above
∵ The decay function is [tex]y(t)=1,232(1-0.063)^{t}[/tex]
∵ [tex]y(7)=1,232(1-0.063)^{7}[/tex]
∴ [tex]y(7)=1,232(0.937)^{7}[/tex]
∴ y(7) = 781.2460671
→ Round it to the nearest penny (2 d.p)
∴ y(7) = 781.25
∴ The value of the couch in 2014 is $781.25 to the nearest penny
∵ The y-intercept is the value of y at t = 0
∴ The y-intercept represents the initial value of the couch
→ The graph is attached down
→ The domain is {t: t ≥ 0}
→ The range is {y: y > 0}
Let's assume that bacteria triples every 15 minutes. If a culture begins with exactly 20 bacterial cells, how many bacterial cells will be present after 1 hour?
Answer: 1,620
Step-by-step explanation: 20x3x3x3x3=1,620
Answer:
There will be 300 cells after one hour.
Step-by-step explanation:
20*3 = 60
60 cells per 15 minutes.
15 = 60
30 = 180
45 = 240
60 = 300
I need help with this question.
Answer:
I think the answer is the fourth option
The ratio of the number of boys to the number of girls in a choir is 6 to 5 there are 55 girls in the choir how many boys are in the choir
Answer:
Step-by-step explanation:
Driscoll Middle School held basketball tryouts after school. Out of the 80 students, only 25% made the team. How many students made it on the team?
Find the value of x.
Answer:
Step-by-step explanation:
1. The total should be 90 degree so your equation should look like this:
(x + 17)° + 15 = 90
2. Now simplify: (x+17)° = 90 - 15
3. Simplify: x + 17 = 75
4. Simplify: x = 75 - 17
5. Simmplify and celebrate: x = 58
Pls brainliest!
Jim drove 455 miles in 7 hours.
At the same rate, how many miles would he drive in 5 hours?
Mount Everest is 29029 feet high.How many meters high is it. Show work
Answer:
8848 meters high 29029ft = 8848meters
the value of a?????????
Answer:
46.5
Step-by-step explanation:
divide
