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Ivahew [28]
2 years ago
14

How do you solve (7x + 5) - (3x + 2)

Mathematics
2 answers:
Gre4nikov [31]2 years ago
7 0

Answer:

When solving equations like this, you have to use a method called PEMDAS.

This stands for:

<h3>P- Parentesis</h3><h3>E- Exponents</h3><h3>M- Multiply</h3><h3>D- Divide</h3><h3>A- Addition</h3><h3>S- Subtraction</h3>

(7x + 5) - (3x +2)

Let's work it out...

Step one) Distribute the equation

Distributing the equation helps simplify it and make solving much easier.

(7x−5) − 1(3x−2)

(7x−5) − 3x + 2

Step two) Eliminate the Parenthesis

Now that the equation is simplified, you can take out the Parenthesis.

(7x − 5) − 3x + 2

7x − 5 − 3x + 2

Step three: Add the numbers

Add the two whole numbers together (-5 + 2)

7x − 5 − 3x + 2

7x − 3 − 3x

Step four: Combine like terms

Combine like terms or the numbers with variables (7x - 3x)

7x − 3 − 3x

4x − 3

Solution

<h2>4x - 3</h2>

Hope this helped! :)

Korolek [52]2 years ago
6 0

Answer:

x = 0.75

Step-by-step explanation:

Simplifying

(7x + -5) + -1(3x + -2) = 0

Reorder the terms:

(-5 + 7x) + -1(3x + -2) = 0

Remove parenthesis around (-5 + 7x)

-5 + 7x + -1(3x + -2) = 0

Reorder the terms:

-5 + 7x + -1(-2 + 3x) = 0

-5 + 7x + (-2 * -1 + 3x * -1) = 0

-5 + 7x + (2 + -3x) = 0

Reorder the terms:

-5 + 2 + 7x + -3x = 0

Combine like terms: -5 + 2 = -3

-3 + 7x + -3x = 0

Combine like terms: 7x + -3x = 4x

-3 + 4x = 0

Solving

-3 + 4x = 0

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '3' to each side of the equation.

-3 + 3 + 4x = 0 + 3

Combine like terms: -3 + 3 = 0

0 + 4x = 0 + 3

4x = 0 + 3

Combine like terms: 0 + 3 = 3

4x = 3

Divide each side by '4'.

x = 0.75

Simplifying

x = 0.75

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Geometry/////
Montano1993 [528]

Answer:

A = 388.58 cm^2

Step-by-step explanation:

For a cone whose base has a radius R, and a hypotenuse S, the area is:

A = pi*R^2 + pi*R*S

Where pi = 3.14

In this case, we can see that the diameter is: 15cm

Then the radius, half of the diameter, is:

R = 15cm/2 = 7.5cm

The hypotenuse is 9cm, then S = 9cm

A = 3.14*(7.5cm)^2 + 3.14*(9cm)*(7.5cm) = 388.575 cm^2

Rounding to two decimal places, we need to look at the third one, which is a five, so we need to round up:

A = 388.58 cm^2

3 0
2 years ago
Hi. I have been doing really bad at math. I have a "tutor" and I study for hours yet I get F's on all my quizzes. I really need
Damm [24]

Answer:

just practice time and again practice might not make perfect but it surely makes better. relying when your teacher only might not help you must mostly rely on your hard work and also have people at your disposal to help you including the said teacher hope you'll improve

7 0
2 years ago
What is the inequaliity of 3&lt;-5n+2n and how do you put it on a number line
timama [110]
The inequality would be the negative factor, because -5n+2n is 3n. You would write it on a number line like this..... 
Sry, i was just making an educated guess.... RIP....

6 0
3 years ago
Read 2 more answers
Please help! Really easy math, need it asap!!! It's in the picture
Dominik [7]

Answer:

answers are: (-1,-2), (1,2), (-1,5), (1,-5). in other words, option 2, 6, 7, and 8.

Step-by-step explanation:

hope it helps

3 0
2 years ago
Help me pls i want to pass my math class
kati45 [8]

Answer:

C

The slope is -2

The y-intercept is (0,1)

Slope=mx

y-intercept=b

y=mx+b

4 0
2 years ago
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