All categories

3 years ago

3x - 9 + 4x Please Help

Mathematics

2 answers:

Wewaii [24]3 years ago

7 0

Answer:

Add like terms 7x - 9

Step-by-step explanation:

Sveta_85 [38]3 years ago

7 0

Add the 4 and 3 then you will get

7x-9

You might be interested in

What is the value of the expression “eight more than three times the difference of four and a number” when n = 3?

Trava [24]

Answer:

The value of the expression would be 11.

Step-by-step explanation:

3 (4 - n) + 8

When n = 3:

3 (4 - 3) + 8

3 (1) + 8

3 + 8

8 0

3 years ago

Read 2 more answers

In diagram below De is parallel to XY what is the value of X

barxatty [35]

The answer is 65° because 115° and another number has to add up to 180°

8 0

4 years ago

Read 2 more answers

Question 1: find the volume of a cube whose total surface area is 486cm^2

lapo4ka [179]

<h3>The volume of cube is 729 cubic centimeter</h3>

Solution:

The surface area of cube is given as:

$Surface\ area = 6a^2$

Where, "a" is the length of side of cube

Given that, surface area = 486 square centimeter

$486 = 6a^2\\\\a^2 = \frac{486}{6}\\\\a^2 = 81\\\\a = 9$

Find the volume of cube:

$volume\ of\ cube = a^3\\\\volume\ of\ cube = 9^3\\\\volume\ of\ cube = 9 \times 9 \times 9\\\\volume\ of\ cube = 729$

Thus volume of cube is 729 cubic centimeter

8 0

3 years ago

What is x^2 -7x + 12 = 0 what is using method of factoring

statuscvo [17]

$x^2 -7x + 12 = 0 \\ \\ (x - 4)(x - 3) = 0 \\ \\ x = 4, 3 \\ \\$

The final result is: x = 4, 3.

6 0

3 years ago

Find the missing lengths of the sides.

Irina18 [472]

Answer:

The choice third ; a=9 , c= 18

Step-by-step explanation:

$\sin(60) = \frac{9 \sqrt{3} }{c} \\ \\ c = 18$

$\tan(30) = \frac{a}{9 \sqrt{3} } \\ \\ a = 9$

3 0

3 years ago