100 = 2t + 4f
40= t + f
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get t or f by itself first.
f = 40 - t : Then substitute it back into for f in the other equation
100 = 2t + 4f
100= 2t +4(40-t)
100= 2t + 160 - 4t
100 = -2t + 160
-160 -160
<u>-60 </u>= <u>-2t
</u>-2 -2
t = 30 (Then plug this into either equation to solve for f)
Therefore,
t = 30 questions
f = 10 questions
446,221 rounded to the nearest ten thousands would be 450,000
Step-by-step explanation:
<h2>—Math</h2>
x² – 2x + 7 = 4x – 10
x² –2x – 4x + 7 + 10= 0
x² –6x + 17 = 0
Answer:
You should start with a simple equation. And remember- practice makes perfect.
The basic algebraic equation involves simple addition or subtraction with one unknown quantity, such as 2 + x = 7.
1. Subtract 2 from both sides: 2 - 2 + x = 7 - 2.
2. Simplify the equation by doing the math: 2-2+x=7-2=0+x=5, or x = 5.
3. Check your work by substituting the answer, 5, into the equation for x.
The correct answer is x=5.
Greetings! Hope this helps!
Answer
A = 157
Explanation
3.14 x 10^2
3.14 x 100
314
314/2
157
Have a good day!
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A brainliest would help tons! :D
