All categories

3 years ago

10. Find the value of x. (5x+12) (3x+8)

Mathematics

2 answers:

xeze [42]3 years ago

8 0

Answer:20
5x add 3x is 8x 12 + 8 is 20 so 8x + 20 = 180 because it’s a straight line so 180-20 is 160 then divide 160 by 8 to work out 1 x rather than 8 x which is 20

Solnce55 [7]3 years ago

8 0

Answer:

Step-by-step explanation:

This is an isosceles triangle so the two down angles are equal

(5x+12) + (3x+8) = 180° (angle on a straight line is equal 180°)

Open brackets

5x+12 + 3x+8 = 180

8x + 20 = 180

Collecting like terms

8x = 180 - 20

8x = 160

Dividing by 8

x = 160/8

x = 20°

You might be interested in

A landscaper has enough cement to make a patio with an area of 150 Sq ft. The homeowner wants the length of the patio to be 6 ft

Natasha_Volkova [10]

$A=lw=150\\l=w+6\\(w+6)w=150\\w^2+6w=150\\w^2+6w-150=0\\w=\frac{-b+-\sqrt{b^2-4ac}}{2a}\\w=\frac{-(6)+-\sqrt{(6)^2-4(1)(-150)}}{2(1)}\\w=\frac{-6+-\sqrt{36+600}}{2}\\w=\frac{-6+-\sqrt{636}}{2}\\w=\frac{-6+-2\sqrt{159}}{2}\\w=-3+-\sqrt{159}>0\\w=-3+\sqrt{159}\\\\l=(-3+\sqrt{159})+6\\l=3+\sqrt{159}$

Width = -3 + sqrt(159)
Length = 3 + sqrt(159)

4 0

3 years ago

Brienne and 3 friends bought tickets to the movies. They spent a total of $27.00 on the tickets. Which equation represents this

Sindrei [870]

Hello!

The equation that represents this situation is A. 3t = 27.

Explanation:

This is because an equation is a "mathematical sentence" and this equation says that if you multiply the costs of the three friends' tickets, the total cost would be $27.

5 0

3 years ago

3×=18 what the answer to this problem

Luden [163]

Answer:

x=6

Step-by-step explanation:

Divide both sides by 3

7 0

3 years ago

Read 2 more answers

Nobody even helps on this app anymore it’s so annoying :(

son4ous [18]

Answer:

Sometimes it does take time but then yet again it can take weeks to get an answer depending on the question.

Step-by-step explanation:

<u><em>EXAMPLE: </em></u>Forenisc Science Questions that are usually under Biology. I saw someone that put up this answer and hasn't gotten a response in a whole week until I actually took the test and gave him/her the answer. It even happens to me. I have many answers that have not been answered but I get used to it :( Have a good one! :)

8 0

3 years ago

40 pts!! Simplify the expression in the picture.

tino4ka555 [31]

Answer:

D. (27x^6y^9) / x^9.

Step-by-step explanation:

(3x^2y^3 / z^3 )^3

= 3^3 x^(2*3)y(3*3) / z^(3^3)

= 27 x^6y^9 / x^9.

4 0

3 years ago

Read 2 more answers