3 years ago

Multiply out the bracket and simplify 3(x+7)+2x

1 answer:

5 0

Remember
order of operaions and distributiv propery
a(b+c)=ab+ac

3(x+7)+2x
multiply first (distribute)
3(x+7) =3x+21
3x+21+2x
5x+21

You might be interested in

How many solutions does the system have? \begin{cases} 3x+y=8 \\\\ 2x+2y=8 \end{cases} ⎩ ⎪ ⎪ ⎨ ⎪ ⎪ ⎧ 3x+y=8 2x+2y=8 Choose 1

ELEN [110]

Answer:

This system has one solution (x=2 and y=2), then the answer is A.

Step-by-step explanation:

The system of equations is:

$3x+y=8$ (1)

$2x+2y=8$ (2)

Let's multiply the first equation by 2 and subtract it to the second equation

$6x-2x+2y-2y=16-8$

$4x=8$

$x=2$

Using this value in (1) we can find y.

$3(2)+y=8$

$6+y=8$

$y=2$

Therefore, this system has one solution (x=2 and y=2), the answer is A.

I hope it helps you!

3 0

3 years ago

Freeeeeeeeeeeeeeeeeeeeeeer pointk

tigry1 [53]

welp thank you for this

7 0

3 years ago

What is the value of x? <br> sin41°=cos x<br> Enter your answer in the box. <br> x = °

creativ13 [48]

Answer:

x = 49°

Step-by-step explanation:

The sine of an angle is equal to the cosine of its complement:

x = 90° -41° = 49°

5 0

3 years ago

What’s the geometric mean between 7 and 28 ?

Yuki888 [10]

I believe the mean its 14!

5 0

3 years ago

HELP PLEASE :(( thank u

yaroslaw [1]

Answer:

the 3rd one hope that helped

Step-by-step explanation:

8 0

3 years ago