Answer:
x=6
Step-by-step explanation:
Mean is another word for average. It is found by adding up all of the values, and dividing that number by the amount of values you added together.
You have 5 values that get a mean or, average, of 7.4
1) We can write this as the following:
(11+12+5+3+x)/5=7.4
2) To solve, multiply both sides by 5:
11+12+5+3+x=37
3) Now combine all of the numbers on the left:
31+x=37
4) Now subtract 31 from both sides:
x=6
Answer:
mi clase favorita es (put In the name of the class)
El or la maestra (if man maestro or woman maestra) name the teacher of your favorite class.
In then asks what is in front, behind, to the left, and right of you in your favorite class
Step-by-step explanation: you will need to pick your favorite class. Mi clase favorita es matemáticas. El maestro es Señor Joe. Enfrente de mí es otro estudiante. Detrás de mí es una ventana. Al la izquierda y derecha son libros de matemáticas. This is an example.
Answer:
5(3x + 5) or 15x + 25
Step-by-step explanation:
A regular pentagon has 5 sides of equal length. The perimeter is the sum of the lengths of those sides. We can use multiplication to find the sum of 5 of the same value:
P = 5(3x +5)
Perhaps you want it expanded. Using the distributive property, we multiply each term in parentheses by 5:
P = 15x + 25
Answer:
see below
Step-by-step explanation:
8- 2x - 5- 13x = 6
Combine like terms
-15x+3=6
Subtract 3 from each side
-15x+3-3=6-3
-15x = 3
Divide each side by -15
x = 3/-15
x = -1/5
Check
8 - 2(-1/5) -5 -13(-1/5) = 6
8 + 2/5 -5 +13/5 = 6
3 + 15/5 = 6
3+3=6
6=6
Area of rectangle = lw
Perimeter of triangle = side+side+base
Therefore
(2x-1)(x+8)=5x-1+6x+8+8x+15
2x^2+15x-8=19x+22
Then move all terms to one side and solve for x (quadratic formula)
2x^2-4x-7
(4+-6.6)/4
=2.7, -.7
I hope these answers are correct, but if not I hope I explained well enough for you to work out yourself
Hope this helped :)