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
Mariana [72]
3 years ago
5

John is five years older than his sister. The product of their present ages is 150.

Mathematics
1 answer:
photoshop1234 [79]3 years ago
5 0
Took 3 of us in grade 10 but johns present age is 77.5 and his sister is 72.5
You might be interested in
Anybody good in geometry and know how to do this? Free Brainliest and points !! I need at least 3 ppl to answer this !
yan [13]

Answer:

IM TERRIBLE IN GEOMETRY

Step-by-step explanation:

8 0
3 years ago
A. Evaluate the polynomial
sdas [7]

Answer:

a) y = x³− 5x² + 6x + 0.55 at x = 1.37.

Use 3-digit arithmetic with chopping. Evaluate the percent relative round-off error.

-1.183%

b. Express y as y = ((x − 5)x + 6)x + 0.55 (this is the same equation). Use again 3-digit arithmetic with chopping. Evaluate the percent relative round-off error and compare with part (a). Make the conclusion about which form of the polynomial is superior.

-0.161%

Comparing part a and b together, part b is more superior because the percent(%) error is smaller when compared to part a

Step-by-step explanation:

a) y = x³− 5x² + 6x + 0.55 at x = 1.37.

Use 3-digit arithmetic with chopping. Evaluate the percent relative round-off error.

Let's evaluate before applying the 3 digit arithmetic chopping rule

y = 1.37³ - 5 × 1.37² + 6 × 1.37 + 0.55

y = 1.956853

Let evaluate each components of the polynomial one by one

Note that: 3-digit arithmetic chopping means to approximate chop off or remove number after the 3 significant figures.

y = x³− 5x² + 6x + 0.55 at x = 1.37.

x³ = 1.37³ = 2.571353

≈ 2.57

x² = 1.37² = 1.8769

≈ 1.88

5x² = 1.87 × 5

= 9.35

x = 1.37

6x = 1.37 × 6

6x = 8.22

Evaluating the polynomial

y = 2.57 - 9.38 + 8.22 + 0.55

y = 1.98

The percent relative round-off error =

1.956853 - 1.98/1.956853 × 100

= -1.183%

b. Express y as y = ((x − 5)x + 6)x + 0.55 (this is the same equation). Use again 3-digit arithmetic with chopping. Evaluate the percent relative round-off error and compare with part (a). Make the conclusion about which form of the polynomial is superior.

y = ((x − 5)x + 6)x + 0.55

Evaluating with the 3 digit chop off rule is applied

= ((1.37 - 5)1.37 + 6)1.37 + 0.55

=( 1.8769 - 6.85) + 6) 1.37 + 0.55

= (- 4.9731 + 6 )1.37 + 0.55

= 1.0269 × 1.37 + 0.55

= 1.406853

= 1.956853.

≈ 1.96

Note in: evaluating before applying the 3 digit arithmetic chopping rule

y = 1.37³ - 5 × 1.37² + 6 × 1.37 + 0.55

y = 1.956853

The percent relative round-off error

1.956853 - 1.96/1.956853 × 100

= -0.161%

Comparing part a and b together, part b is more superior because the percent(%) error is smaller when compared to part a

3 0
3 years ago
What is 300 is 10 times as much as
Over [174]
30 because 30x10=300
5 0
3 years ago
The graph of the function f(x)
Oksi-84 [34.3K]

Step-by-step explanation:

A special relationship where each input has a single output. It is often written as "f(x)" where x is the input value. Example: f(x) = x/2 ("f of x equals x divided by 2") It is a function because each input "x" has a single output "x/2": • f

4 0
3 years ago
One of the tents you look at has a base measuring 3 metres long and 250 centimetres wide what is the area of the tent
ozzi
3 +250= 253 take 253 dived it by 3 ,subtract 4 =80.3
5 0
3 years ago
Other questions:
  • What is the product of 3a + 5 and 2a2 + 4a – 2?
    13·1 answer
  • Sally has a piece of cloth used 1/3 of a foot of the cloth to make a pillow cover in another 4/7 of a foot of the cloth to make
    8·1 answer
  • What is the slope of a line that is perpendicular to the line whose equation is 2x−y=7?
    7·1 answer
  • Find the mean absolute<br> deviation of the set of data.<br> 4, 5, 8, 8, 10 (I also need on this)
    9·1 answer
  • Find x to the nearest tenth. Click on the pic i really need help
    8·1 answer
  • Find the measure of angle A<br><br> Plss help luvs
    6·1 answer
  • The area of the base of a cylindrical container is defined by b(x) = x*2 - x + 12. Find
    12·1 answer
  • What time did he reach ???​
    9·1 answer
  • Original price: $32 Sale Price: $8 So what is the percent if discount?
    15·1 answer
  • Which unit would probably be used to measure how long a cell phone is?
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!