please help me please​

Answer:

2x + 18 ≥ 21

x ≥ 2/3

Step-by-step explanation:

Let sum be X

2 times the sum means 2x

the sum of a number and 18 means x + 18

at least -21 means ≥ 21

put them together, and you get, 2x + 18 ≥ 21

If solving for x,

2x + 18 ≥ 21

2x ≥ 3

x ≥ 2/3

Answer:

a. y = 4x  b. 48 feet

Step-by-step explanation:

y = mx + b

Plotted points found:

(5,20) (10,40)

Delta y/Delta x

(40-20)/(10-5)

20/5 = 4

Slope: 4

y = 4x + b

The y-intercept is when x = 0. In this case, the y-intercept is 0.

Equation: y = 4x

b.

y = 4(12)

y = 48 feet

The weights of the first and second packages are :

First package = 2.48 pounds

Second package = 2.6 pounds

Answer:

3rd is greater Than first.

Step-by-step explanation:

Weight of third package = 2.5 pounds

Comparing the weight of first and 3 rd package :

2.5 > 2.48

Weight of 3rd package > Weight of first package

First package :

2.48 pounds

Third package :

2.50 pounds

Greatest place value of the package weight is the unit value, 2 ; since the unit value is the same, we take the 2nd highest place value of the weight ;the tenth

Value of the tenth digit = 4

Value of the tenth digit in third package = 5

Since, 5 > 4 ; then 3rd weight package is greater than first weight package

Answer:

The weights of the first and second packages are :

First package = 2.48 pounds

Second package = 2.6 pounds

Answer:

3rd is greater Than first.

Step-by-step explanation:

Weight of third package = 2.5 pounds

Comparing the weight of first and 3 rd package :

2.5 > 2.48

Weight of 3rd package > Weight of first package

First package :

2.48 pounds

Third package :

2.50 pounds

Greatest place value of the package weight is the unit value, 2 ; since the unit value is the same, we take the 2nd highest place value of the weight ;the tenth

Value of the tenth digit = 4

Value of the tenth digit in third package = 5

Since, 5 > 4 ; then 3rd weight package is greater than first weight package

Step-by-step explanation:

Answer:

The answer is China.

Step-by-step explanation:

Hope it helps:))

Answer:

China accounts for over 30 percent of the world's fish production, making them the number one country for fishing when it comes to sheer numbers.

Step-by-step explanation:

Answer:

definetely not a pog champ :)

Step-by-step explanation:

Answer:

346.4 square centimeters (cm²)

Answer:

346.185 cm²

Step-by-step explanation:

radius = diameter / 2

Area of a circle = πr²

radius = 21/2 = 10.5

Area = 3.14(10.5)²

Area = 346.185 cm²

Answer:

9.38cm

Step-by-step explanation:

you have a right triangle. use pathagorean

x^2 + 9^2 = 13^2

x^2 + 81 = 169

x = √88

x = 9.38

Answer:

pick the simplest of the 2 equations

Step-by-step explanation:

5y-2x=10

5y = 2x +10

y = 2/5x + 2

now substitute

8x + 5(2/5X +2)=60

8x + 2x + 10 = 60

10x = 50

x = 5

y = 4

Answer:

They would have built 84 cars

Step-by-step explanation:

From the question, they have already built 9 cars

Now, the hourly production rate is 15 cars per hour;

So therefore, in 5 hours, total that would have been built excluding the initial 9 will be;

15 * 5 = 75 cars

Now, let us add the initial 9

we have this as 9 + 75 = 84 cars

Answer:

1/4.

Step-by-step explanation:

There are 3 even numbers in the 6 numbers on a cube.

So Probability first roll is even = 3/6 = 1/2.

By the same reason Probability of odd number = 1/2.

So: Probability(First is even and second is odd) = 1/2 * 1/2 = 1/4.

Answer:

0

Step-by-step explanation:

-7+-3

0

ueewowwwyhkfi9hwhwiw

Answer:

7.8 and 18.8 is your answer

Step-by-step explanation:

give other person brainliest and yes Ik I’m very late ~w~

Answer:

40

Step-by-step explanation:

i think? i may have not understood the picture correctly, so if this is wrong i apologise

The total surface area of the given pyramid is 304 sq units.

A pyramid is three dimensional shape. A pyramid has a polygonal base and flat triangular faces, which join at a common point called the apex.

Every face of the pyramid is triangular  except the base. The base is square shaped. So we will use the formula of area of triangle to find the area of each face of the pyramid. And we will use the formula of area of square to find the base area of the pyramid.

The area of triangle is = (1/2)×base×height

The are of square = (side)²

Given that the length and breadth of base is = 8 units

So, the area of base is = 8²=64 sq units.

Also the height of the each triangular face is 15 units.

So, the area of each face is = (1/2)×8×15

=4×15

=60 sq units.

So, the total area of four triangular faces of the pyramid = 4×60

=240 sq units.

Hence, the surface area of the pyramid = Area of four traingular faces + Area of square base

=240+64

=304sq units

Thus , The required surface area of the pyramid is = 304 sq units

To learn more about pyramid click here:

https://brainly.com/question/22029250

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Answer: 20 feet

Step-by-step explanation:

This represents a right angled triangle with the length of the slide being the hypotenuse, the height of the ladder being the height of the triangle and the distance from the base of the ladder being the length.

Solve with Pythagoras rule:

c² = a² + b²

c = hypotenuse

a= length

b = height

29² = 21² + b²

841 = 441 + b²

b² = 841 - 441

b² = 400

b = √400

b = 20 feet

Answer:

A

Step-by-step explanation:

Answer d

because if we use option a then second part of the question will not satisfy

if we use option b then first part will not satisfy

hence.this question has no solution

Answer:

628.31853

Step-by-step explanation:

V=πr2h

3=π·102·6

3≈628.31853

Answer:

200π

Step-by-step explanation:

h/3πr²

6/3· 10² · π

2 · 100 · π

= 200 π

Answer:

y < -1/2x + 2

Step-by-step explanation:

x+2y<4

subtract x from both sides

2y<-x+4

then divide both by 2

y< -1/2+2

Answer:

168 seconds

I edited the answer.

Step-by-step explanation:

To find the the time taken for both lights to flash at the same time, we need to find the lowest common multiple of 28 and 24.

28 x 6 = 168, 24 x 7 = 168

The LCM of 28 and 24 is 168.

So it takes 168 seconds for both lights to flash at the same time.

Both lights will flash together again at 2 minutes and 8 seconds.

To find When will they flash together again if they flash together.

LCM is the method to find the smallest possible multiple of two or more numbers.

Given that,

A red light flashes once every 28 seconds

A green light flashes once every 24 seconds

A red light flashes every 28 seconds and green light flashes once every 32 seconds. Therefore,  we have to find their least common factor.

LCM(28 , 24) = 168

The red and green light will flash together after every 168 seconds.

Time  =168 seconds

Time =168 / 60 minutes

Time = 2 minutes and 8 seconds

The red and green light will flash together after every 2 minutes and 8 seconds.

Hence, both lights will flash together again at 2 minutes and 8 seconds.

Learn more about LCM here:

https://brainly.com/question/22400981

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Answer:

4

Step-by-step explanation:

20/5=rate

4=rate

Answer:

1/2 or 0.5!!!!!!!!!!!!!

Answer:

x=1/2

Step-by-step explanation:

take 1/4 from each side to get x on it's own.

Answer:

4

Step-by-step explanation:

11s+9t=116

5s+9t=92

Minus bottom equation from the top

6s+0=24

divide 6 on both sides

s=4

Answer:

the answer is 12 yd if you are talking about the question mark.

Step-by-step explanation:

Well, if you split this  figure into two rectangles, then the 16 yd length becomes 12 yd because the one congruent to it is 4 yd. Both sides are congruent so you'd get 12 yd.

Answer:

BRAINLIEST

Step-by-step explanation:

2i

−4

+3i

=

5

2

i

Step-by-step explanation:

i think it helps

Answer:

[tex]\frac{6}{25}[/tex] - [tex]\frac{8}{25}[/tex] i

Step-by-step explanation:

Assuming you mean

[tex]\frac{2i}{-4+3i}[/tex]

To simplify, rationalise the denominator

Multiply the numerator/ denominator by the conjugate of the denominator

The conjugate of - 4 + 3i is - 4 - 3i , then

= [tex]\frac{2i(-4-3i)}{(-4+3i)(-4-3i)}[/tex] ← expand numerator and denominator

= [tex]\frac{-8i-6i^2}{16-9i^2}[/tex] [ note that i² = - 1 ]

= [tex]\frac{-8i+6}{16+9}[/tex]

= [tex]\frac{6-8i}{25}[/tex]

= [tex]\frac{6}{25}[/tex] - [tex]\frac{8}{25}[/tex] i ← in standard form

Answer:

the longest side is AC

Step-by-step explanation:

The longest side will be opposite the largest angle.

4x+(2x-6) + (4x-4) = 180 (all triangle interior angles add up to 180 degrees)

simplify:

10x - 10 = 180

10x = 190

c= 19

angle B = 4(19) = 76 degrees

angle A = 2(19) - 6 = 32 degrees

angle C = 4(19) - 4 = 72 degrees

so the longest side is AC

Answer:

it is C and E

Answer:

...Who is that??

Answer:

Magic sarap

Step-by-step explanation: