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3 years ago

What is 7x-4x=27,solve for x?

Mathematics

2 answers:

Elena L [17]3 years ago

8 0

Answer:

x=9

Step-by-step explanation:

victus00 [196]3 years ago

7 0

7x-4x=27
Combine like terms 7x-4x (7-4) = 3
3x= 27
Divide by 3 on both sides to get x by itself

3x/3=27/3
Now what’s 3 divided by 3? 1 so x
And 27 divided by 3? 9
Answer:
X=9

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Solve the inqualities 3x-3<9

pentagon [3]

Answer: x < 4

Step-by-step explanation: When solving the inequality 3x - 3 < 9, just like an equation our first step is to isolate the <em>x</em> term which is 3x by adding 3 to both sides of the inequality.

On the left, -3 + 3 cancels and we have 3x.

Make sure to bring down the < sign.

On the right, 9 + 3 simplifies to 12.

So we have 3x < 12.

Now, divide both sides of the inequality by 3 to isolate <em>x</em>.

When we do that we get <em>x < 4</em>

So our answer is x < 4.

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3 years ago

Log8(216)+[log(42)_log(6)]÷log(49)

makkiz [27]

Answer:

3 log (3) + 1/2

Step-by-step explanation:

log8(216) + [log(42) - log(6)] ÷ log(49) =
log (216)/ log (8) + [log (7) + log (6) - log (6)] ÷ 2 log (7) =
3 log (3) log (2) / 3 log (2) + log (7) / 2 log (7) =
3 log (3) + 1/2

7 0

3 years ago

When adding √9 and -7, which type of number is the sum?

dezoksy [38]

We are given numbers √9 and -7.

Square root 9 is a perfect square.

Square root 9 = 3.

So, if we add square root 9 and -7, we would get

√9 + -7 = 3 -7 = -4.

So, we got a negative whole number.

<em>A negative or positive whole number is called an integer</em>.

So, it's an integer.

<h3>Therefore, correct option is D. Integer.</h3>

8 0

3 years ago

Read 2 more answers

Casey has n nickels. Megan has 4 times as many nickels as Casey has. Write and expression for the total number of nickels Casey

AnnyKZ [126]

Step-by-step explanation:

Let n be the number of nickels that Casey has.

We are told that Megan has 4 times as many nickels as Casey has, therefore, the number of nickels that Megan has will be 4*n.

Now we will add the amounts of nickels that Casey and Megan have to find the total amount of nickels.

$\text{Total number of nickels Casey and Megan have}=n+4*n$

Therefore, the expression $n+4*n$ will represent the total number of nickels that Casey and Megan have .

Upon combining like terms we will get,

$\text{Total number of nickels Casey and Megan have}=(1+4)n$

$\text{Total number of nickels Casey and Megan have}=5n$

Therefore, Casey and Megan have 5n nickels.

6 0

3 years ago

A balloon containing 0. 500 mol Ar at 0. 00°C and 65. 0 kPa pressure is expanded by adding more argon. Formula: PV = nRT (R = 8.

Nuetrik [128]

Using an ideal gas equation to solve the problem. Then the original volume is 17.67 liters.

<h3>What is an ideal gas equation?</h3>

An ideal gas is a theoretical composed of a set of randomly moving gas particles that interact only through elastic collision.

Given

A balloon containing 0.500 mol at 0. 00°C and 65.0 kPa pressure are expanded by adding more argon.

Pressure (P) = 65 kPa

Mole (n) = 0.5 mol

Temperature (T) = 0 °C = 273.15 K

Universal gas constant (R) = 8.317 L.kPa/mol.K

We know the ideal gas equation

$\rm PV =nRT\\\\V \ \ = \dfrac{nRT}{P}$

Put the values, we have

$\rm V = \dfrac{0.5*8.317*273.15}{65}\\\\V = 17.67$

Thus, the original volume is 17.67 liters.

More about the ideal gas equation link is given below.

brainly.com/question/4147359

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2 years ago