answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Novay_Z [31]
1 year ago
9

In September, Shalee had some money in her bank account. In October she earned $48.24 and put it in her account. In November she

spent three-fourths of the money in her bank account on a dress. If she spent $68.28 on the dress, how much money did she have in her account in September?
Mathematics
1 answer:
sasho [114]1 year ago
4 0

Answer:

x = $42.8

Step-by-step explanation:

Let

Amount of money shalee has in Sept = $x

Shalee October earnings = $48.24

Total money = $x + $48.24

She spent 3/4 of the money on dress

3/4 of (x + 48.24) = $68.28

3/4 * x + 48.24 = 68.28

3/4x + 144.72/4 = 68.28

3/4x + 36.18 = 68.28

3/4x = 68.28 - 36.18

3/4x = 32.10

x = 32.10 ÷ 3/4

= 32.10 × 4/3

= 128.4/3

= 42.8

x = $42.8

You might be interested in
Marine ecologists estimate the reproduction curve for swordfish in a fishing ground to be f(p) = −0.01p2 + 9p, where p and f(p)
Nimfa-mama [501]

Answer:

The population that gives the maximum sustainable yield is 45000 swordfishes.

The maximum sustainable yield is 202500 swordfishes.

Step-by-step explanation:

Let be f(p) = -0.01\cdot p^{2}+9\cdot p, the maximum sustainable yield can be found by using first and second derivatives of the given function: (First and Second Derivative Tests)

First Derivative Test

f'(p) = -0.02\cdot p +9

Let equalize the resulting expression to zero and solve afterwards:

-0.02\cdot p + 9 = 0

p = 450

Second Derivative Test

f''(p) = -0.02

This means that result on previous part leads to an absolute maximum.

The population that gives the maximum sustainable yield is 45000 swordfishes.

The maximum sustainable yield is:

f(450) = -0.01\cdot (450)^{2}+9\cdot (450)

f(450) =2025

The maximum sustainable yield is 202500 swordfishes.

6 0
2 years ago
Given a positive integer n, assign true to is_prime if n has no factors other than 1 and itself. (remember, m is a factor of n i
yawa3891 [41]
This is the following condition in order to get the specific output for this specific problem: if is_a_prime(n):<span>    is_prime = True</span> <span><span>Now all you have to do is write is_a_prime().

For the hard code for this problem:

</span>if n == 2:<span>
is_prime = True
elif n % 2 == 0:
is_prime = False
else:
is_prime = True 
for m in range (3, int (n * 0.5) + 1, 2): 
if n % m == 0: 
is_prime = False 
<span>break.</span></span></span> 
<span>
To add, a high-level programming language that is widely used for general-purpose programming<span>, created by Guido van Rossum and first released in 1991 is called Python.</span></span>
6 0
2 years ago
Read 2 more answers
5(x-4)=12 plzzz help
vivado [14]

Answer:

x=6.4

Step-by-step explanation:

5(x-4)=12

5x-20=12

add 20 from both sides

5x=32

divide 5 on both sides

x=6.4

7 0
2 years ago
Read 2 more answers
A region R in the xy-plane is given. Find equations for a transformation T that maps a rectangular region S in the uv-plane onto
Gre4nikov [31]
\begin{cases}y=2x-2\\y=2x+2\end{cases}\implies\begin{cases}-2x+y=-2\\-2x+y=2\end{cases}

For these lines, let u=-2x+y.

\begin{cases}y=2-x\\y=4-x\end{cases}\implies\begin{cases}x+y=2\\x+y=4\end{cases}

And for these, let v=x+y.

Now,

\begin{cases}u=-2x+y\\v=x+y\end{cases}\implies \begin{bmatrix}u\\v\end{bmatrix}=\underbrace{\begin{bmatrix}-2&1\\1&1\end{bmatrix}}_{\mathbf T}\begin{bmatrix}x\\y\end{bmatrix}

The vertices of S in the x-y plane are (0, 2), (2/3, 10/3), (2, 2), and (4/3, 2/3). Applying \mathbf T to each of these yields, respectively, (2, 2), (2, 4), (-2, 4), and (-2, 2), which are the vertices of a rectangle whose sides are parallel to the u-v plane.
6 0
2 years ago
Abdullah is a quality control expert at a factory that paints car parts. He knows that 20\ , percent of parts have an error in t
-Dominant- [34]

The error rate has decreased after changing the painting process.

<u>Step-by-step explanation:</u>

Abdulla knows that 20 percent of the parts have an error in their painting. After suggesting changes in painting process, he wants to know whether the error rate has changed.

Number of parts in the random sample=400400400

Number of parts that had an error=606060

We have to determine what percentage of 400400400 is 606060

606060=x/100 \times 400400400\\=0.15%

After changing the painting process 0.15% of parts have error.

The previous percentage was 20.Hence the error rate has clearly changed.

3 0
2 years ago
Other questions:
  • Naomi went on a 6.5 mile hike. In the morning she hiked 1.75 miles, rested,and then hiked 2.4 more miles. She completed the hike
    14·2 answers
  • Write the sum using summation notation, assuming the suggested pattern continues. -9 - 3 + 3 + 9 + ... + 81
    15·2 answers
  • While crossing the Atlantic, sailors spot two mermaids 120° apart on each end of an island that is 6 miles away. How far apart a
    7·1 answer
  • Marla did 65 sit ups each day for one week.Use the distributive property to show an expression you can use to find the total num
    15·1 answer
  • Complete the similarity statement for the two triangles shown. Enter your answer in the box. △XBR∼△ Two similar triangles B R X
    10·1 answer
  • Instructions:Select the correct answer from each drop-down menu. The sides of ∆ABC are 30 units, 40 units, and 60 units long. Th
    8·1 answer
  • The population of a parish is growing with an annual percentage rate compounded continuously. The population reaches 1.1 times i
    11·2 answers
  • The height of a cylinder is twice the radius of its base. A cylinder has a height of 2 x and a radius of x. What expression repr
    10·2 answers
  • Which of the following exponential functions represents the graph below?
    12·1 answer
  • Orthographic projection and isometric projection are two ways to show three-dimensional objects in a two-dimensional space, such
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!