Answer:
15 is your answer.
Step-by-step explanation:
Let "a number" = x
"Three times a number increase(d) by 4" = 3x + 4
"...is the same as" = "="
"four times that number decreased by 11" = 4x - 11
Set the equation:
3x + 4 = 4x - 11
Isolate the variable, x. Subtract 4x and 4 from both sides:
3x (-4x) + 4 (-4) = 4x (-4x) - 11 (-4)
3x - 4x = -11 - 4
Simplify. Combine like terms:
-x = -15
Isolate the variable, x. Divide -1 from both sides:
(-x)/-1 = (-15)/-1
x = (-15)/(-1)
x = 15
15 is your answer.
~
Answer:
probability that will not rain tomorrow
P(nR) = 1-0.85
= 0.15
is the answer
Answer:
your answers are correct
Step-by-step explanation:
A straight angle measures 180°. It looks like a straight line with the vertex as a marked point on the line.
__
A right angle is usually marked with a little square in the corner, as in diagrams 2 and 5. Diagram 2 also shows complementary angles, two angles that have a sum of 90°.
__
Supplementary angles have a sum of 180°, so can form a straight angle as in diagram 1.
__
An obtuse angle is one that has a measure greater than 90°. (If it is greater than 180°, it is called a <em>reflex angle</em>.)
__
An acute angle is one that measures less than 90°.