How do I solve this number pattern 17,_,25,29,_

Answers

Answer 1

Answer:

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.

I hope I helped you with your solution! If you could give me brainliest, I would be very thankful!

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HELPCookies are on sale! Today each cookie costs $0.75 less than the normal price. Right now if you buy 7 of them it will only cost you $2.80!

equation

answer

Answers

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.

The square of the sum of two numbers is 144 and the sum of their square is 180, find the numbers

Answers

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

⇒ $x - (18)/(x) = 12$

⇒ x² - 18 = 12x

⇒ x² - 12x - 18 = 0

Using the quadratic formula

$x = \frac{12 \pm \sqrt{(-12)^(2) - 4(1)(-18) } }{2}$

⇒ $x = (12 \pm 14.7)/(2) = 13.35, 1.35$

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,

$x = \frac{- 12 \pm \sqrt{12^(2) - 4(1)(-18)}}{2}$

⇒ $x = (- 12 \pm 14.7)/(2) = 1.34, -13.35$

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)

After 125% ,markup and a 10% discount, the price of a watch is $30.78 before tax, what was the whole price?

Answers

The 125% markup is $38.465 which I rounded it to $38.47 since it's money

To find the markup, you have to multiply 1.25 by 30.78 which you get $38.47 and then add it by $30.78 which you get $69.24

Then you multiply 10% or .10 by 69.24 which you get $6.92.

Finally, you just subtract $6.92 from $69.24 and you get the price of the watch which is $62.32

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 700 feet. What is the average rate of change?

Answers

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 = $\frac{\text{(Change in altitude)}}{\text{Change in time}}$

= $(700-400)/(6-2)$

= $(300)/(4)$

= 75 feet per hour

Therefore, 75 feet per hour is the rate of change in altitude.

Average rate of change =
(change in height during some time) / (length of time for the change).

Change in height = (700 feet - 400 feet) = 300 feet

Time for the change = (6 hours - 2 hours) = 4 hours

Average rate of change = (300 feet) / (4 hours) = 75 feet per hour

Kelsey has 20 pints of potting soil. She wants to put the soil in quart containers for the science lab. How many quart containers does she need? Show and explain your thinking.

Answers

20 pints = 10 quarts

She needs 1 quart for each containers, she only has 10 quarts of soil so she can only fill 10 containers.

The answer:10

Movie tickets cost $7 for students and $9 for adults. A group of 8 people spent $66 on movie tickets. How many adult tickets were bought?

Answers

It would be 5 adults.

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