The relation between 25 and 29 is 4. Therefore, the next step down from 25 is 21. This also works with 17. Therefore, the second missing number is 33.
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equation
answer
Equation:
(2.80÷7)+.75(tofindtheoriginalcostofthecookies)
2.80÷7(tofindthenewcostofthecookies)
Answer:
$1.15 is the original cost of the cookies.
$0.40isthenewcostofthecookies.
Equation:
2.80 ÷ 7 (new cost of the cookies)
(2.80 ÷ 7) + .75 (original cost of the cookies)
Answer:
$1.15 is the original cost of the cookies.
$0.40 is the new cost of the cookies.
Answer:
x = 13.35, y = - 1.35
or, x = 1.35, y = - 13.35
or, x = - 13.35, y = 1.35
Step-by-step explanation:
Let us assume that x and y are the two numbers.
So, given that (x + y)² = 144
⇒ x² + 2xy + y² = 144 ........ (1)
⇒ x + y = ± 12 ......... (2)
Again, x² + y² = 180 ........... (3)
Now, from equations (1) and (3) we can write 2xy + 180 = 144
⇒ 2xy = - 36
⇒ xy = - 18 ........ (4)
Now, for x + y = 12
⇒
⇒ x² - 18 = 12x
⇒ x² - 12x - 18 = 0
Using the quadratic formula
⇒
Now, for x = 13.35, from equation (4) we get, y = - 1.35
And for x = 1.35, from equation (4) we get, y = - 13.35
Now, for x + y = - 12
⇒ x² + 12x - 18 = 0
Using the quadratic formula,
⇒
Now, for x = - 13.35, from equation (4) we get, y = 1.35
And for x = 1.35, from equation (4) we get, y = - 13.35
Therefore, x = 13.35, y = - 1.35
or, x = 1.35, y = - 13.35
or, x = - 13.35, y = 1.35 (Answer)
Answer:
75 feet per hour is the rate of change in altitude.
Step-by-step explanation:
A climber is on a hike. After 2 hours he is at an altitude of 400 feet.
After 6 hours, he is at an altitude of 400 feet.
We have to determine the average rate of change in altitude.
We know rate of change in altitude =
=
=
= 75 feet per hour
Therefore, 75 feet per hour is the rate of change in altitude.