Okay, you now a triangle has 180º degrees and to add to 180º, you have to add all the numbers you have like this:
2x+x+90 (the box is 90º)=180º; add like terms like 2x+x
3x+90=180; cancel 90 by subtracting it and also subtract 90 from 180
3x=90;divide 3 to isolate x and also divide 90/3
x=30 :)
Answer:
(See explanation for further details)
Step-by-step explanation:
The expression is transformed into its standard form:



The function does not represent a circle, as radius is a positive number.
Answer:
y=-2/5x+2
Step-by-step explanation:
Hey there!
3.9 times 10 to the seventh power is equivalent to the equation 3.9 ×
The seventh power indicates the amount of times the decimal moves to the right of 3.9, so that expression would be equivalent to 39,000,000.
Hope this helps!