5(2x +8) = -8x + 4
Use distributive property:
10x +40 = -8x + 4
Subtract 40 from each side:
10x = -8x -36
Add 8x to each side:
18x = -36
Divide both sides by 18:
x = -36 / 18
x = -2
The number is -2
Answer:
The length of the altitude drawn to the base of the triangle is 8.49
Step-by-step explanation:
In this question, we are asked to calculate the length of the altitude to the base of an isosceles triangle given the length of one of the legs and the base angle. To answer this sufficiently, we consider the diagram of the triangle in the attached file.
From the triangle , we can see that we want to calculate the length h.
Let’s look at a cut-out triangle from the big triangle. This is the triangle AOC
WE can calculate the length of h here, using trigonometric identity. What we have is the hypotenuse and the opposite, this means that the trigonometric identity to use is the sine
Sine 45 = h/12
h = 12 * sine 45
Sine 45 = 0.7071
h = 12 * 0.7071
h = 8.49
Answer:
Option A. is correct.
Step-by-step explanation:
Given: A cell phone company recently noticed a
sales decrease in the month of July compared to June such that
represent June's sales.
Also,
represents July's sales.
To find: equation that can be used to determine the sales in July
Solution:
June's sales 
Decrease in sales 
So,
July's sales 
Also,
July's sales 
Therefore,

So, option A. is correct.
Count the reduction of price
reduction = 20,000 - 17,250
reduction = 2,750
After find the amount of reduction, we count the precentage by this formula
percentage = reduction/old price × 100%
Now input the number to the formula
percentage = 2,750/20,000 × 100%
percentage = 11/80 × 100 %
percentage = (1,100/80) %
percentage = 13.75%
The decrease in the price is 13.75% from the regular price