Step-by-step explanation:
When x = 4,
x² + x = (4)² + 4 = 16 + 4 = 20.
Answer:
The balloons new height is
Step-by-step explanation:
Let
x ----> the number of minutes
y ----> the height of a hot air balloon in feet
we know that
The linear equation in slope intercept form is equal to
where
m is the slope or unit rate
b is the y-intercept or initial value
In this problem we have
The slope is equal to
---> is negative because is a decreasing function
The y-intercept is equal to
substitute
For x=9 minutes
substitute in the linear equation
Answer:
C = 6 pi cm or approximately 18.84 cm
Step-by-step explanation:
The circumference of a circle is given by
C = pi * d
C = 6 pi
If we approximate pi by 3.14
C = 6 * 3.14
C =18.84
Answer:
it would be C. Either the IQR or the range are good measures of variability because the distribution has no outliers
Step-by-step explanation:
Answer:
x = -7
Step-by-step explanation:
Seven times a number and seven is equal to six times a number.
Word problems can be tricky no matter what level of math or science you are in.
First look at the question for words that indicate mathematical symbols.
"times" indicates multiplication
"and" indicates addition
"a number" means we have a variable, x, to solve for
Now we can go from left to right and write it in a mathematical equation
7x + 7 = 6x
Then, solve for x
7x + 7 = 6x
7 = 6x - 7x
7 = -1x
7/-1 = x
x = -7
Finally, we check our work.
7x + 7 = 6x
7(-7) + 7 = 6(-7)
-49 + 7 = -42
-42 = -42 √
The answer is x = -7