What number 21# I’ll mark brainliest

Answer:

16 sides and 157.5°

Step-by-step explanation:

Answer:

209/48 or mixed number 4 [tex]\frac{17} \frac{48}[/tex]

Step-by-step explanation:

Answer:

d) 20

Step-by-step explanation:

To find possible side lengths use the triangle inequality theorem. The Triangle Inequality Theorem states that the sum of any 2 sides of a triangle must be greater than the measure of the third side. So for the measurements 6, 11, 20 to make a triangle 6+11 must equal at least 20, which isn't true. Therefore, 20 cannot be a measurement for this triangle.

Answer:

x=21.6 degrees

Step-by-step explanation:

sin=opposite/hypotenuse

x=sin(3/8)=21.5558896=21.6

Answer:

8

Step-by-step explanation:

simple math simplemath

Answer:

y=8

Step-by-step explanation:

im smart

Ans23.0

Step-by-step explanation:

Answer:

2

Step-by-step explanation:

Answer:

there are 13 newspapers per pile

Step-by-step explanation:

to find newspapers per pile we divide 39/ 3

39/3= 13

Answer:

You would multiply 38.3 time .40 which is the 40%

this would give us

=15.32

Answer:

$46.8

Step-by-step explanation:

45x.04=1.8

45+1.8= 46.8

Answer:

The volume is;

3951.8 cm^3

Step-by-step explanation:

As we can see, the sphere diameter is 19 cm

Radius is half of this which is 19/2 = 9.5 cm

Putting this in the area , we have

4/3 * 3.142 * 9.5^3 = 3951.8

cm^3

Answer:

6cm

Step-by-step explanation:

The formula for the surface area of a sphere = 4πr²

From the Question, we are given:

The surface area of a sphere = 144pi square centimeters = 144π cm²

The length of the radius of the sphere, in centimeters is calculated by:

4πr² = 144π

Divide both sides by 4π

4πr²/4π = 144π/4π

r² = 36

Square root both sides

√r² = √36

r = 6cm

Therefore, the length of the radius of the sphere, in centimeters is 6 centimeters.

Answer:

x = 3

Step-by-step explanation:

Answer:

1. y = 1/3x - 1

2. y = 2/5x

3. y = x + 8

Step-by-step explanation:

Generally, we have the equation of a straight line as;

y = mx + c

where m is the slope and c is the y-intercept

So, we have the following based on the supplied values;

1. y = 1/3x - 1

2. y = 2/5x

3. y = x + 8

Answer:

2.43/9

Step-by-step explanation:

2.43/9 i leave u to calculate

Answer:

a ≈ 13.1

c ≈ 13.8

Step-by-step explanation:

set up proportions based on corresponding sides:

17 = 13

a       10

13a = 170

a ≈ 13.1

18 = c

17      13

17c = 234

c ≈ 13.8

Answer:

#4,   x-1/(x^2+3x+2)

Step-by-step explanation:

x/(x^2+3x+2) - 1/((x+2)(x+1))

Convert the 1/((x+2)(x+1)) to 1/(x^2+3x+2)

now you have a common denominator to subtract

x/(x^2+3x+2) - 1/(x^2+3x+2)

results x-1/(x^2+3x+2)

Answer:

947

Step-by-step explanation:

subtrac 6 from 3 then add what you get back to the number then subtract what you get 3x

Answer:

t = -14

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Equality Properties

Step-by-step explanation:

Step 1: Define

-98 = 7t

Step 2: Solve for t

Step 3: Check

Plug in t into the original equation to verify it's a solution.

Here we see that -98 is equal to -98.

∴ t = -14 is the solution to the equation.

t = -14

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets

Parenthesis

Exponents

Multiplication

Division

Addition

Subtraction

Left to Right

Equality Properties

Multiplication Property of Equality

Division Property of Equality

Addition Property of Equality

Subtract Property of Equality

Step-by-step explanation:

Step 1: Define

-98 = 7t

Step 2: Solve for t

Divide 7 on both sides: -14 = t

Rewrite: t = -14

Step 3: Check

Plug in t into the original equation to verify it's a solution.

Substitute in t: -98 = 7(-14)

Multiply: -98 = -98

Here we see that -98 is equal to -98.

∴ t = -14 is the solution to the equation.

Answer:

60r+70

Step-by-step explanation:

10(6r+7)

(6r*10)+(7*10)

60r+70

R is equivalent to 1.1666...

Answer:

60r+70

Step-by-step explanation:

Answer:

C

Step-by-step explanation:

So this one is pretty much like the last one

the distance on the x values is 6 and the distance on the y values is 4

1/6 of 6 is 1 and 1/6 of 4 is .66

We subtract the coordinates from R

4-1 is 3

2 -.66 =1.33

The 1/6 point is at (-3,1.33)

Answer:

it’s 90 because there equal add both up to 180

Answer:

I think its 90 but don't trust me im literally failing all my classes

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Work Shown:

2x+3y = 18

3y = 18-2x ..... subtract 2x from both sides

3y = -2x+18

y = (-2x+18)/3 .... divide both sides by 3

y = (-2x)/3 + 18/3

y = (-2/3)x + 6

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As a quick shortcut, anything in the form Ax+By = C will convert to y = (-A/B)x+(C/B) when you solve for y.

The slope is -A/B and the y intercept is C/B

Answer:

i think 1 but I am not sure

Step-by-step explanation:

Answer:

6 miles

Step-by-step explanation:

At a speed of 8 2/5 miles per hour, you can run a distance of 6 miles

Speed = distance / time taken

8 2/5 = x ÷ 5/7

42/5 = x ÷ 5/7

cross product

42/5 × 5/7 = x

x = (42×5) / (5×7)

= 210/35

= 6 miles

Therefore, you can run a distance of 6 miles at a speed of 8 2/5 miles per hour

Learn more about speed:

https://brainly.com/question/4931057