Is BC=2.3 one of the options?
For that question, you can use the cosine rule, where;
In this case, we have..
Solving for BC with this will get you 2.250406, rounded off to the tenth is 2.3.
do you need help with all of them?
Multiply both sides by 3
Simplify the numerators
Multiply both sides by 6
Simplify the numerator
Multiply both sides by x
12x - 18 = 15x Subtract 12x from both sides
-18 = 3x Divide both sides by 3
-6 = x Switch the sides to make it easier to read
x = -6
Check your answer by plugging -6 in for the x in the original problem:
Plug in -6 for x
Change
to
so all denominators are the same
Change
to
for easier work
Subtract the numerators (4 - (-1) )
=
So,
x = -6 .
Y-8=13
y=13+8
y=21
Hope this helps!
Answer:
Just take the two zeros to 100
Step-by-step explanation: