Answer:
Niki's time for one lap is 1 min 10 sec
Step-by-step explanation:
Let
x ----> niki's time for one lap
Remember that
so
we know that
Niki's time for one lap multiplied by 0.90 (percentage in decimal form) must be equal to Toya's time for one lap
so
The linear equation that represent this problem is
solve for x
Convert to min
Answer:
A) 15 and 16
Step-by-step explanation:
The square root of 250 is 15.8, so it falls between:
15 and 16
Answer:
Part 1
The mistake is Step 2: P + 2·x = 2·y
Part 2
The correct answer is
Step 2 correction: P - 2·x = 2·y
(P - 2·x)/2 = y
Step-by-step explanation:
Part 1
The student's steps are;
Step 1; P = 2·x + 2·y
Step 2: P + 2·x = 2·y
Step 3: P + 2·x/2 = y
The mistake in the work is in Step 2
The mistake is moving 2·x to the left hand side of the equation by adding 2·x to <em>P </em>to get; P + 2·x = 2·y
Part 2
To correct method to move 2·x to the left hand side of the equation, leaving only 2·y on the right hand side is to subtract 2·x from both sides of the equation as follows;
Step 2 correction: P - 2·x = 2·x + 2·y - 2·x = 2·x - 2·x + 2·y = 2·y
∴ P - 2·x = 2·y
(P - 2·x)/2 = y
y = (P - 2·x)/2
Answer:
14, 15, 16
Step-by-step explanation:
45-2 <em>The difference in integers, that way they're all the same number</em>
43/3=14
14, 15, 16
