b = -1-7ab=−1−7a
Can be rewritten to be easier to understand.

In addition you can say the following equation is valid due to the way your problem was given to you.

Of course, you can simplify equation 2

This ends up giving you b so you don't end up having to do any substitution in order to find b. Now substitute the value for b into either equation. I'm choosing the third because it's easiest.


And there you go :)
Answer:
Therefore the measure of∠ A is 60.07.
Step-by-step explanation:
Given:
In Right Angle Triangle ABC
∠ B = 90°
BC = 13 ....Side opposite to angle A
AC = 15 .... Hypotenuse
To Find:
m∠A = ?
Solution:
In Right Angle Triangle ABC ,Sine Identity,

Substituting the values we get

Therefore the measure of∠ A is 60.07
Its already simplified... you dont have a term for Y or X so it is already simplified
Answer:
6% change
Step-by-step explanation:
First find the difference between students at the end and the beginning of the year.
1200-1128=72
to find the percent, you need to divide the difference by the initial value.
72/1200=0.06
move the decimal
6%
The best estimate for the circumference of a 19.875 diameter barrel would be 5ft.
Answer: 5ft
~Lillyprince