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
djverab [1.8K]
3 years ago
5

Seven times a number decreased by three-fourths of the same number is 25. What is the number?

Mathematics
2 answers:
natta225 [31]3 years ago
7 0

Answer:

if we make this a algebraic equation it will look like this

7x-3/4x=25

6.25x=25

25 divided by 6.25=4

x=4

to check

28-3=25

Hope This Helps!!!

Tomtit [17]3 years ago
5 0

Answer:

103/28

Step-by-step explanation:

Let the number be 'x'

Equation:-

7x - 3/4 = 25

7x = 25 + 3/4

7x = 100/4 + 3/4

7x = 103/4

x = 103/(4 x 7)

x = 103/28

You might be interested in
What is the volume of the sphere shown below? 13 A. 527 units O B. 676 3 i units 3 C. 8788 3 i units 3 O D. 10472 units3​
vichka [17]
527, because it is hope it helps
6 0
2 years ago
The y-intercept of a parabola is 1, and its vertex is at (1,0). What function does the graph represent
Juliette [100K]
Wouldn’t be a quadratic right?
5 0
3 years ago
16 points<br> 1) Write the following in standard form (answer). *<br> 4^5
m_a_m_a [10]

Answer:

1024

Step-by-step explanation:

You could put 4^5 into your calculator. It’s 4*4*4*4*4= 1024

3 0
3 years ago
A radio manufacturer believes that the length of life of WPPX model radio is normal with µ=12 years and σ=2.5 years. (a) What pe
kicyunya [14]

Answer:

(a) 5.48%

(b) 17.82 years

(c) 21.19%

(d) 15.21 years

Step-by-step explanation:

z = (x-μ)/σ,

where

x is the raw score

μ is the population mean

σ is the population standard deviation.

µ=12 years and σ=2.5 years.

(a) What percent of the radios will function for more than 16 years?

For x = 16

z = 16 - 12/2.5

z = 1.6

Probability value from Z-Table:

P(x<16) = 0.9452

P(x>16) = 1 - P(x<16)

1 - 0.9452

= 0.054799

Converting to percentage = 0.054799 × 100

= 5.4799%

Approximately = 5.48%

(b) Suppose the company decides to replace 1% of the radios. Find the length of the guarantee period. i.e. find X.

find the z score of the 99th percentile = 2.326

Hence:z = (x-μ)/σ

2.326 = x - 12/2.5

Cross Multiply

2.326 × 2.5 = x - 12

5.815 = x - 12

x = 12 + 5.815

x = 17.815

Approximately = 17.82 years

(c) What percent of the radios that will fail to satisfy the guarantee period of 10 years? , i.e. less than 10 years?

When x < 10

Hence,

z = 10 - 12/2.5

z = -0.8

Probability value from Z-Table:

P(x<10) = 0.21186

Converting to percentage

0.21186 × 100

= 21.186%

Approximately = 21.19%

(d) If 10% of the radios will function for more than X years, find X.

The z score would be : 100 - 10%

= 90th percentile z score

We find the z score of the 90th percentile = 1.282

Hence:z = (x-μ)/σ

1.282 = x - 12/2.5

Cross Multiply

1.282 × 2.5 = x - 12

3.205 = x - 12

x = 12 + 3.205

x = 15.205

Approximately = 15.21 years

4 0
2 years ago
Good afternoon!
Vladimir [108]

9514 1404 393

Answer:

  5) 112°

  6) 40°

Step-by-step explanation:

5) The angle E or ? is half the sum of the intercepted arcs:

  ? = (130° +94°)/2 = 112°

__

6) The angle D is half the difference of the intercepted arcs:

  ? = (135° -55°)/2 = 40°

8 0
2 years ago
Other questions:
  • Jose is surveying shoppers about their use of the new pharmacy in a grocery store. Which of the following questions in his surve
    10·2 answers
  • What is 17-2c for c =7
    6·2 answers
  • 9th out 10 questions
    5·1 answer
  • Find the value of x.<br> A. 144<br> B. 44<br> C. 25<br> D. 50
    9·1 answer
  • Ecuaciones con resultado 17
    14·1 answer
  • You run the same speed every day. Saturday you ran 4 miles in 32 minutes. On Sunday you ran 3 miles in m minutes.
    12·2 answers
  • The expression 6x2 gives the surface area of a cube, and the expression x3 gives the volume of a cube, where x is the length of
    6·1 answer
  • 1) Which of the following is NOT a property of reflection?
    14·1 answer
  • Which is the value of this expression when a = 5 and k = negative 2?
    5·1 answer
  • A like goes through the point (-4,-6) and the point (10,1) write the equation of the line intercept form
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!