The unknown number is n. So n is the unknown variable in the equation.
In order to write an equation in which n is included we must know some dependence of n with other values.
We know that <span>the difference of three times a number and 44 is −19. So, we can write:
3*n-44=-19
3*n=-19+44
3*n=25
n=25/3
</span>
Answer:
Square feet
Step-by-step explanation:
Hope this helped
Answer:
b
Step-by-step explanation:
area = pie x radius(2)
= 3.142 x 13 (2)
= 530.998
When using substitution, you want to solve an equation for one variable that doesn’t make the equation worse to work with.
The general idea is that you want to find a variable that has a coefficient of 1 or -1.
In 2.5x - 7y = 7.5, both variables have “bad” coefficients.
In 6.2x - y = 1, the y has a coefficient of -1. That’s where you want to start.
A. X=81
B. Y=99
C. Z=129
A triangle equals 180 degrees so all the numbers inside the triangle must add up to 180. Therefore you do 48+51-180 to give you x. Then subtract the number you got for x from 180 to find y and subtract 51 from 180 to find Z
