MATHEMATICS HIGH SCHOOL

Select the postulate that is illustrated for the real numbers.
5•1=5

Answers

Answer 1
Answer:

Answer:

Multiplication identity

Step-by-step explanation:

We are given that

5\cdot 1=5

We have to find which property of real number is used in given expression.

Multiplication identity: It is defined as the number by which multiply any number and get itself.

a\cdot 1=1\cdot a=a

Then, 1 is multiplication identity.

5\cdot 1=5

When we are multiplying 5 with 1 then we get 5.

Therefore,  1 is multiplication identity.

Hence, multiplication property of real numbers is used in given expression.
Answer 2
Answer: Multiplication Identity

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How many solutions does this system have 2x+y=3 6x=9-3y one none infinite two

N Squared - N = 90
N =?

Answers

n^2 - n = 90
n^2 - n - 90 = 0
(n - 10)(n + 9) = 0

n - 10 = 0
n = 10

n + 9 = 0
n = -9

answer is : n = 10 and n = -9

la un depozit s-au adus in perioada recoltarii 25 t de cartofi in primele doua zile s-au vandut 230 q de cartofi . cate kg

Answers

.23 kg Cred că asta e răspunsul , dar nu im atât de sigur.

Pierce works at a tutoring center on the weekends. At the center, they have a large calculator to use for demonstration purposes that is a scale model of calculators available for the students to use. Each key on the student calculators is 14 millimeters wide, and each key on the demonstration calculator is 2.8 centimeters wide. If the student calculators are 252 millimeters tall, how tall is the demonstration calculator?

Answers

The height of the demonstration calculator is 504 millimeters.

To find the height of the demonstration calculator, we can use the ratio of the key widths between the student calculators and the demonstration calculator.

Let's first convert all measurements to the same unit for consistency. Since we need to find the height of the demonstration calculator, let's convert the width of the keys on the demonstration calculator to millimeters, which is the unit used for the height of the student calculator.

1 centimeter (cm) = 10 millimeters (mm)

Width of the key on the demonstration calculator =

= 2.8 cm x 10 mm/cm

= 28 mm

Now, we know the width of each key on the demonstration calculator is 28 millimeters.

We can use this information to find the height of the demonstration calculator.

The ratio of the width of the keys on the demonstration calculator to the width of the keys on the student calculator is:

= 28 mm (demonstration calculator) / 14 mm (student calculator)

Now, let's set up a proportion to find the height of the demonstration calculator (Hd):

Hd (demonstration calculator) / 252 mm (student calculator)

= 28 mm (demonstration calculator) / 14 mm (student calculator)

Hd / 252 = 28 / 14

Hd / 252 = 2

Hd = 2 x 252

Hd = 504 millimeters

So, the height of the demonstration calculator is 504 millimeters.

Learn more about Unit conversion click;

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Final answer:

The height of the large demonstration calculator is 50.4 cm, determined by converting measurements to the same units and using the scale factor between the student and demonstration calculators.

Explanation:

The question involves scale factor and unit conversion in mathematics. The scale factor between the student calculator buttons and the large demonstration calculator buttons is 2.8 cm (button size of large calculator) divided by 1.4 cm (button size of student calculator, which equates to 14 mm). Therefore, the scale factor is 2.

To find the height of the large calculator, we multiple the height of the student's calculator (252 mm or 25.2 cm) by the scale factor 2. Therefore, the height of the large demonstration calculator is 50.4 cm.

Learn more about Scale Factor here:

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Find the value of 5 (3)

Answers

Answer:

15

Step-by-step explanation:

You take 5 times 3.

Given that cos 27° = 0.891, enter the sine of a complementary angle.
sin

Answers

9514 1404 393

Answer:

  sin(63°) = 0.891

Step-by-step explanation:

The cosine of an angle is the sine of its complement. The angle with a sine of 0.891 is 90° -27° = 63°.

   sin(63°) = 0.891

What is the volume of this cone?

Answers

Answer:

314

Step-by-step explanation:

volume of cone = 1/3 * pi * r^2 * h = 1/3 * pi * 5^2 * 12

Answer:

3

Step-by-step explanation:
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