Answer:
A: 7 + 3 (negative 4) (2)
Step-by-step explanation:
Just as a rule of thumb, whenever you multiply or divide one negative number and one positive number, the outcome is always negative. However, whenever you multiply or divide two negative numbers OR two positive numbers, the outcome is always positive.
Now, let's first convert all these words into simple mathematical expressions and then solve them:
A) "7 + 3 (negative 4) (2)" = 7 + 3 * (-4) * 2 = 7 + (-24) = -17
B) "Negative 2 Left-bracket 12 divided by (negative 3) Right-bracket" =
-2 * [12/(-3)] = -2 * (-4) = 8
C) "(15 minus 7) minus (9 divided by 3)" = (15 - 7) - (9/3) = 8 - 3 = 5
D) "Negative 5 Left-bracket 7 + (negative 14) Right-bracket minus 30" =
-5 * [7 + (-14)] - 30 = -5 * (-7) - 30 = 35 - 30 = 5
The only expression that produces a negative value is the first one, A.
Hope this helps!
Answer:
The friend's claim is not correct
Step-by-step explanation:
we know that
If two lines are perpendicular, then their slopes are opposite reciprocal (the product of their slopes is equal yo -1)
Example
A given line has a slope of
---> (is less than 1)
the slope of the line perpendicular to the given line is equal to

substitute


so
the perpendicular line don't have a positive slope
therefore
The friend's claim is not correct
Answer:
$45
Step-by-step explanation:
divide 50 by 100 (as in 100%) then multiply it by 90 (as in 90%)
50 ÷ 100 × 90 = 45
Answer:
First of all, find x from the Pythagorean theorem
, which c is the hypotenuse.



c=25 or x=25
Next, we have to figure out the value of y and z. So, you need to use inverse trigonometric functions.
arctan
degrees. arctan
degrees.
All in all, the values are
x=25
y=16.3
z=73.7
Hope this helps and have a nice day!
Answer:
$66,000
Step-by-step explanation:
The F statistic = 45
The t statistic = 6.709