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
3x60= 180 is the missing variable
Answer:
Step-by-step explanation:
Let's use the variable x to represent the unknown number.
Also, the word, "product", indicates multiplication.
In this problem, the product of a number and -4 would be represented as -4 x
The words, "is at most", would be represented as: <
Then to create the inequality, subtract 15:
-4 x - 15 < 32
Now solve the inequality using inverse operations. NOTE - Be sure to reverse the direction of the inequality symbol when multiplying or dividing by a negative number.
4 x - 15 < 32
-4 x - 15 + 15 < 32 + 15
-4 x < 47
-4 x / -4 > 47/-4
x > -47/4
x > -11.75
Hope this helped!
Answer:
40 m²
Step-by-step explanation:
square area = 4x4 = 16 m²
4 triangles area = 4x3x0.5x4 = 24 m²
16 + 24 = 40 m²