B 5 makes the most sense to me
Just divide regular and the answer will be positive. the answer will be 8
remember:
two positives = positive
two negatives = positive
one positive, one negative = negative
Answer:
acute: 7, 9
right: 8, 10
obtuse: 5, 6
Step-by-step explanation:
When you have a number of identical calculations to do, it is convenient to do them in a spreadsheet. You only need to enter the formula once and copy it as many times as needed.
The attachment shows the "sum of squares" calculation and comparison to the square of the longest side. When the sum is too small, the longest side is longer than needed for a right angle, so the triangle is obtuse. When the sum is too great, the longest side is too short for a right angle, so the triangle is acute.
We have skipped the tedious arithmetic and shown the results in the attached table.
9^(6x)=3^(2x+4) I assume this is what you meant...
since 9=3^2
3^2^(6x)=3^(2x+4)
and since (a^b)^c=a^(bc)
3^(12x)=3^(2x+4)
so if a^b=a^c then b=c so
12x=2x+4
10x=4
x=0.4
We will use the Cosine rule ( graph is in the attachment ):
c - the displacement
Angle: 90° + 45° = 135°
c² = a² + b² - 2 ab cos 135°
c² = 98² + 225² - 2 · 98 · 225 · ( -0.7071 )
c² = 9,604 + 50,625 + 31,183.11
c² = 91,412.11
c = √ 91,412.11
c = 302.344 km