B.
9.4 cm
C.
12.6 cm
D.
15.3 cm
For this case we must find the solution of the following inequality:
5(x+5)<85
We apply distributive property on the left side of inequality:
5x+25<85
We subtract 25 from both sides of the inequality:
5x<85-25
5x<60
We divide between 5 on both sides of the inequality:
x<60/5
x<12
Thus, the solution is given by all values of x less than 12.
x<12
An equation is a mathematical statement that is made up of two expressions connected by an equal sign. For example, 3x – 5 = 16 is an equation. Solving this equation, we get the value of the variable x as x = 7.
The standard form for linear equations in two variables is Ax+By=C. For example, 2x+3y=5 is a linear equation in standard form. When an equation is given in this form, it's pretty easy to find both intercepts (x and y). This form is also very useful when solving systems of two linear equations.
To learn more about the equation, refer
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Answer: no rotation because only reflections through the center of a square can map it onto itself
Answer:
23, 69 and 123
Step-by-step explanation:
let the first number be x then the second number is 3x ( 3 times the first) and the third number is x + 100 ( 100 more than the first number)
The sum of the three numbers is
x + 3x + x + 100 = 215
5x + 100 = 215 ( subtract 100 from both sides )
5x = 115 ( divide both sides by 5 )
x = 23
The 3 numbers are
x = 23, 3x = 3 × 23 = 69 and x + 100 = 23 + 100 = 123
See the attached picture:
X = 9