1answer.
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
NeX [460]
3 years ago
12

Can someone please explain why 33 and 35 are these answers?

Mathematics
1 answer:
nordsb [41]3 years ago
7 0
For #32,
P=2L+2W
Subtract 2W from both sides, and swap left and right
2L = P-2W
Divide by 2
2L/2=(P-2W)/2
L = P/2 - 2W/2
L=P/2 - W

For #35
Most of the expenses are in fractions (of the original amount, A), so they can be added:
A/4 + A/5 + 2A/5 + 750  = A
add the fractions, with a common denominator of 20,
5A/20 + 4A/20 + 8A/20 +750  = A
(5A+4A+8A)/20 +750 = A
17A/20 + 750 = A

Now subtract 17A/20 from both sides and swap left and right
A - 17A/20 = 750
(3/20)A = 750

Multiply both sides by 20/3  (to make one unit of A on the left)

(3/20)*(20/3) A = 750*20/3
A =250*20=5000

You might be interested in
14.
MatroZZZ [7]
It doesn’t show the bar graph
6 0
2 years ago
Suppose a student's score on a standardize test to be a continuous random variable whose distribution follows the Normal curve.
blsea [12.9K]

Answer:

a) Percentage of students scored below 300 is 1.79%.

b) Score puts someone in the 90th percentile is 638.

Step-by-step explanation:

Given : Suppose a student's score on a standardize test to be a continuous random variable whose distribution follows the Normal curve.

(a) If the average test score is 510 with a standard deviation of 100 points.

To find : What percentage of students scored below 300 ?

Solution :

Mean \mu=510,

Standard deviation \sigma=100

Sample mean x=300

Percentage of students scored below 300 is given by,

P(Z\leq \frac{x-\mu}{\sigma})\times 100

=P(Z\leq \frac{300-510}{100})\times 100

=P(Z\leq \frac{-210}{100})\times 100

=P(Z\leq-2.1)\times 100

=0.0179\times 100

=1.79\%

Percentage of students scored below 300 is 1.79%.

(b) What score puts someone in the 90th percentile?

90th percentile is such that,

P(x\leq t)=0.90

Now, P(\frac{x-\mu}{\sigma} < \frac{t-\mu}{\sigma})=0.90

P(Z< \frac{t-\mu}{\sigma})=0.90

\frac{t-\mu}{\sigma}=1.28

\frac{t-510}{100}=1.28

t-510=128

t=128+510

t=638

Score puts someone in the 90th percentile is 638.

5 0
3 years ago
Big trouble what is 99-30
katovenus [111]
I think it is 69 the rat
6 0
2 years ago
Jamie has 6 coins. Each coin is either a penny or a nickel. How much money does Jamie have?
seraphim [82]

He would have 6-30 cents


3 0
3 years ago
Read 2 more answers
I need help with this ASAP
FrozenT [24]

Answer:

id.k sorry

Step-by-step explanation:

5 0
2 years ago
Read 2 more answers
Other questions:
  • Noelle has 5/6 of a yard of purple ribbon and 9/10 of a yard of pink ribbon. How much ribbon does she have altogether?
    9·2 answers
  • Jenna has 76.47 dollars she bought 2 books for 39.86 dollars how much does she have left
    11·2 answers
  • What is surface area​
    11·1 answer
  • 2 dice are rolled. What is the probability that the sum of the numbers rolled is a number greater than or eaqual to 5
    5·2 answers
  • If QP=25, MN=35, and SR=13, calculate the area of LMN.
    5·1 answer
  • In the diagram at right, triangle ABC~ triangle AED.
    14·2 answers
  • Which of the following is one of the cheapest routes to pass through each vertex once starting and ending with
    12·1 answer
  • Find the distance between the points given.<br><br> (-1, -1) and (1, 3)<br><br> √5<br> √(17)<br> 2√5
    10·2 answers
  • Which of the following is another way to express the problem 1 - (-7)? 01-7 0 1+(-7) 0-1 + (-7) 0-1+7​
    15·1 answer
  • This composite figure is created by placing a sector of a circle on a rectangle. What is the area of this
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!