Answer:
70 questions
Step-by-step explanation:
You can make a proportion.
Multiply across:
7x=490
Divide by 7:
x=70
<u>Final answer</u>
70 questions
On his way to work a man notices that 9 of the 16 traffic lights are green. Is there a significance to say that these traffic li
2 answers:
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Answer:
Step-by-step explanation:
apply the rule (a) = a
apply the exponent rule
add the numbers
which would make the answer
Answer:
see below for explanation
3x +2y = 15
Step-by-step explanation:
The x-coordinate and the y-coordinate are both linear functions of t, so their relationship to each other is linear. A graph of those (x, y) points must be a line.
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You can find an equation by solving one of the expressions for t, then substituting that into the other.
x = 2t +3
t = (x -3)/2
Substituting into the y expression, we get ...
y = 3 -3(x -3)/2
y = (-3/2)x + 15/2
3x +2y = 15 . . . . . . . add 3/2x and multiply by 2 to put into standard form
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The attached graph shows a portion of the line defined parametrically (0 ≤ t ≤ 1). It is dotted so you can see it overlays the line defined by the linear equation in x and y.
