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2 years ago

I need help, again!! Please help fast!!!

Mathematics

2 answers:

Nat2105 [25]2 years ago

8 0

Answer: See attached

Step-by-step explanation:

6x+9-9>21-9

6x>12

x>2

I hope this helps! <3

Fynjy0 [20]2 years ago

3 0

Answer:

The answer is greater than 2

Step-by-step explanation:

6x + 9 > 21

6x + 9 – 9 > 21 – 9

6x > 12

6x/6 > 12/6

x > 2

Thus, The value of x is greater than 2

<u>-TheUnknownScientist 72</u>

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You can spend $30 on a shopping trip. You want to buy a shirt that cost $14. Write and solve an inequality that represents the a

Mekhanik [1.2K]

Answer:

30 >or equal 14 + x

x is what is left

x has to be < or equal to 16

Step-by-step explanation:

3 0

3 years ago

Solve the simultaneous equations

Contact [7]

Answer:

The solution for given system of equations is: x = 6 and y = 3

(6,3)

Step-by-step explanation:

Given equations are:

$3x+4y=30\ \ \ Eqn\ 1\\3x-y=15\ \ \ \ Eqn\ 2$

There are three methods to solve simultaneous equations

Elimination
Substitution
Co-efficient method

We will use the elimination method as the coefficients of x in both equations are already same

Subtracting equation 2 from equation 1

$3x+4y - (3x-y) = 30-15\\3x+4y-3x+y = 15\\5y = 15\\\frac{5y}{5} = \frac{15}{5}\\y = 3$

Putting y = 3 in equation 2

$3x-3 = 15\\3x = 15+3\\3x = 18\\\frac{3x}{3} = \frac{18}{3}\\x = 6$

Hence,

The solution for given system of equations is: x = 6 and y = 3

(6,3)

7 0

3 years ago

Find the missing length of the triangle

lana [24]

Answer:

Step-by-step explanation:

the formula for this is:

A^2 + B^2 = C^2

if you substitute them:

12^2 + 35^2 =C^2 -> 144+ 1225= 1369

and the square root of 1369 is 37

hope this helps!!!

4 0

3 years ago

Use the distributive property to evaluate each expression (5-7)(-30

ohaa [14]

Answer:

Step-by-step explanation:

You first have to do the parenthesis

(5-7)= 5-7= -2

Then just multiply -30 by -2

Since negative x negative = positive, the answer will be positive.

(-2)(-30)= -2 x -30= 60

8 0

3 years ago

In 4 minutes, a conveyor belt moves 800 pounds of recyclable aluminum from the delivery truck to a storage area. A smaller belt

kkurt [141]

Answer:

It takes 2 minutes 4 seconds to move the cans to storage area if both the belts are used.

Step-by-step explanation:

Given - In 4 minutes, a conveyor belt moves 800 pounds of recyclable

aluminum from the delivery truck to a storage area. A smaller belt

moves the same quantity of cans the same distance in 6 minutes.

To find - If both belts are used, find how long it takes to move the cans

to the storage area.

Proof -

Given that,

Larger belt take 4 minutes to transfer the aluminium from delivery truck to storage area.

⇒ Time taken by Larger belt = 4 min/ shifting

Also,

Smaller belt take 6 minutes to transfer the aluminium from delivery truck to storage area.

⇒ Time taken by Smaller belt = 6 min/ shifting

Now,

As we know that Time is inversely proportional to time, so

Rate of Larger Belt = $\frac{1}{4}$ shifting/min

Rate of Smaller Belt = $\frac{1}{6}$ shifting/min

Now,

Let us assume that , if both belts used then,

Total time taken = x min/shifting

Then, Rate = $\frac{1}{x}$ shifting/min

Now,

$\frac{1}{4}$ + $\frac{1}{6}$ = $\frac{1}{x}$

⇒ $\frac{6 + 4}{24} = \frac{1}{x}$

⇒ $\frac{10}{24} = \frac{1}{x}$

⇒10x = 24

⇒x = $\frac{24}{10}$ = 2.4 minutes

∴ we get

It takes 2 minutes 4 seconds to move the cans to storage area if both the belts are used.

3 0

3 years ago