Mathematics High School

Express the repeating decimal 2.1 repeating as a fraction.

Answers

Answer 1

Answer:

2 1/9

Step-by-step explanation:

Answer 2

Answer:

2.1×10=21

Step-by-step explanation:

.°.2,1/10

=2.1

Related Questions

Please help me solve this. Just number 16.

Answers

Answer:

Smaller angle = 70 degrees

Step-by-step explanation:

Supplementary angles = add up to 180 degrees

let x = bigger angle

smaller angle = (x/2) + 15

x + (x/2) + 15 = 180

x + 0.5x + 15 = 180

1.5x = 165

x = 110

180 - 110 = 70

or

(x/2) + 15 = (110/2) + 15 = 55 + 15 = 70

Light travels about 3 x 10^5 metres per second. Find the time it takes to travel 1 metre. Give your answer in standard form.

Answers

Answer:

t=3.3*[tex]10^{-6}[/tex]

Step-by-step explanation:

t=[tex]\frac{S}{v}[/tex]

As

S=1m

v=3*[tex]10^{5}[/tex]ms^-1

t=[tex]\frac{1}{3*10^{5} }[/tex]

t=3.3*[tex]10^{-6}[/tex]

Answer:  According to the universe in which your light only moves at 3x10^5 meters/sec, it would take 3.333x10^-6 seconds to go 1 meter.  Where I live (Earth in the Milky Way Galaxy), light travels 3x10^8 m/s.  It only requires 3.33x10^-9 second.  So there . . .

Step-by-step explanation:

The speed of light is in units of meters/sec.   If it is 3x10^5 meters/sec, we can also write the inverse:

1 sec/3x10^5 meters  [It takes 1 sec to go 3x10^5 meters]

Do the division to find seconds per 1 meter:  3.333x10^-6 seconds.

-------

For Milky Way inhabitants, the division is 1 sec/3x10^8 meters, or 3.33x10^-9 second.  Time flies for them.

Evaluate x2 – 4x – 5, when x = -4

Answers

Answer:

3

Step-by-step explanation:

-8+16-5

Answer:

13

Step-by-step explanation:

x2 - 4x - 5

4×2 - 4×4 - 5

8 - 16 - 5

8 - 21 = - 13



Is Beryllium a gas, solid, or liquid? *

Answers

Answer:

solid

Step-by-step explanation:

solid..... ......!!!!!!!!

Answer:

beryllium is a solid substance

Step-by-step explanation:

beryllium solid at room temperature

Need this ASAP pls help !

Answers

Start with which equations are written in function notation?
The only ones are the first and last, not the “y=“ ones.

Then look at the equations.
h(x) = x^2 would be a parabola, so the range wouldn’t be all real numbers. It’d only be non-negative numbers.
g(x) = 1/2 x + 3/2 would be a line. This has a range of all real numbers.
c jfjjfjfjfjnfnfjfjfjjf

6 + 4(19 – 15)
Evaluate

Answers

[tex]\large \mathfrak{Solution : }[/tex]

6 + 4(19 - 15)

6 + 4(4)

6 + 16

22

[tex] \huge \boxed{\mathfrak{Question} \downarrow}[/tex]

6 + 4 (19 - 15)

[tex] \large \boxed{\mathfrak{Answer \: with \: Explanation} \downarrow}[/tex]

[tex] \mathfrak{6 + 4 ( 19 - 15 )}[/tex]

Subtract 15 from 19 to get 4.

[tex] \mathfrak{6+4\times 4 }[/tex]

Multiply 4 and 4 to get 16.

[tex] \mathfrak{6+16 }[/tex]

Add 6 and 16 to get 22.

[tex] = \large\boxed{ \boxed{ \bf22 }}[/tex]

Find each angle. Separate your awnser with a comma. For an example 18, 72

Answers

(5x+7) + (8x-21) = 90
13x-14 = 90
13x= 104
X=8
The angle measurements are 47, and 43

Simplify the expression and write the result in standard form, a+bi
3 √-25 =

Answers

Answer:

[tex]3 + \sqrt{ - 25} = 3 + \sqrt{25} i\\ = 3 + 5i \\or \: \\ 3 \sqrt{ - 25} \\ = 3 \times 5i = 15i \\ thank \: you \\ [/tex]

Work these out for me

Answers

There should at least be a PLEASE

The equation for line a is shown. y=-2/3 x-4
line a and b are parallel, and the point (-2,1) lies on line b. write the equation for line b

Answers

Step-by-step explanation:

line a slope (x coefficient)= -2/3

Parallel lines have the same slope and will never intersect.

line b slope = -2/3

line equation =

y =mx + b

m = slope

y= -2/3 x + b

from the point given (-2,1)

x = -2

y = 1

1 = 4/3 + b

b = -1/3

b equation =

y = (-2/3)x - (1/3)

Can someone plz help me I beg you :((

Answers

I think is rational and integer

Answer:

all of them

Step-by-step explanation:

Pls help I’ll give you 35 points

Answers

Answer:

b=21

Step-by-step explanation:

P=2(a+b)

54=2(6+b)

54=12+2b

2b+12=54

2b=54-12

2b=42

b=21

6*21 (area)=126

I hope I helped!

How to verify my answer:

P=2(6+21

P=(12+42)

P=54

AHA! So my answer is correct!

Hope I helped!

Solve 2(x+ 1) = 2x + 2

Answers

Answer:

2(x+1)

Step-by-step explanation:

I think it's work.

A sum is Rs x. If 2÷3 parts of the sum is Rs 20, find the sum.​

Answers

Answer:

30

Step-by-step explanation:

2/3*x=20

2x=20*3

x=60/2

x=30

HURRY PLEASE I NEED IT ASAP 15 POINTSS!!!!
Which pair shows equivalent expressions?
A. 2x10= -2(x-5)
B. -2(x+5)= 2x-10
C. -2x-10= -2(x=5)
D. -2(x-5)=-2x-10

Answers

D shows equivalent expressions

Answer:

Please the answer is not inside

Because it can't be D

2y+-1y+-1y+3=-13 solve for y

Answers

Answer:

There are no values of   y

that make the equation true.

No solution

PLS ANSWER IN IMAGE BELOW!!

Answers

Answer:

y=4

Step-by-step explanation:

8y+1=6y+9

8y-6y=9-1

2y=8

y=4

Find X+Y
Geometry 9th

Answers

Answer:

x = 71 and y = 45

Step-by-step explanation:

X is 71 and y is 45.

The ratio of Tom's age to his nephew's age is 3:1 . The difference in their ages is 24 years.How old is Tom now?

Answers

Answer:

the age of toms nephew is 8 years

Is 9.2 a rational number or irrational explain with steps please

Answers

Answer:

Step-by-step explanation:

It is rational because it doesn't have infinite decimals

Which of the following is written in correct scientific notation?
-4x10²
2.1 x 100
39 x 10
-0.3x10


please help i have to turn this in in the morning

Answers

-4 × 10² is written in correct scientific notation.

witch expressions are equivalent to k/2?

2 answers
k - 2
2/k
1/2k
k divided by 2
k+k

Answers

Answer:

C and D

Step-by-step explanation:

[tex] \frac{k}{2} = \frac{1}{2} k = k \div 2[/tex]

Answer:

c and d

Step-by-step explanation:

yes thats the answer

| 7x-2 | +3 = -1 solve for x

Answers

Answer:

x = -2/7 or

x = 6/7

Step-by-step explanation:

|7x-2| + 3 = -1  subtract 3 from both sides

|7x-2| = -4 now there are two probabilities

7x-2 = -4 or

7x-2 = 4 if first probability the value of x would be:

7x-2 = -4 add 2 to both sides

7x = -2 divide both sides by 7

x = -2/7 for the second probability the value of x would be:

7x-2 = 4 add 2 to both sides

7x = 6 divide both sides by 7

x = 6/7

I need help with this problem

Answers

Answer:

x^3/14

Step-by-step explanation:

When an exponent is raised to an exponent, you multiply the exponents. Therefore, the answer is x^2/7 * 3/4.

is -15/6 a integer?

Answers

Answer:

No its not, integers are any number that is whole, without decimals

-15/6 is -2.5

Since integers are positive and negative whole numbers, -2.5 is not an integer.

Therefore -15/6 is not an integer.

Which graph has a slope of Two-thirds?

Answers

Answer:

On the coordinate plane, a line with a positive slope passes through the points (0, negative 1) and (1, 1).

A line with a slope of 2/3 would go “up 2, right 3”.

By this I mean that if you have a point on the graph and then count “up 2, right 3”, you’ll end up back on the graph.

find the volume of a rectangular prism if the length is 4x, the width is 5x, and the height is x^2+x+2. Use the formula V=lxwxh to find the volume

Answers

Answer:

Step-by-step explanation:

The volume is [tex] V=l\times w \times h[tex]

So

[tex]V=4x \cdot 5x\cdot (x^2+x+2)\\=20x^2\cdot (x^2+x+2)\\=20x^4+20x^3+40x^2.[/tex]

rationalize the expression

√77/11√33​

Answers

Answer:

990

Step-by-step explanation:

99+88+77+66+55+44+33+22+11+11+22+33+44+55+66+77+88+99=990

Brainlist for correct answer and 25 points for answering! Find the equation of the linear function represented by the table below in slope-intercept form.

Answers

Answer:

y=-5x+1

Step-by-step explanation:

hope it helps you

Huilan is 9 years younger than Thomas. The sum of their ages is 85. What is Thomas's age?

Answers

Answer:

Step-by-step explanation:

                                                                                                                        thomas age is 47

Thomas is 47 and Hulian is 38.

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