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4 years ago

Write a question that matches this equation. 45 – n = 15

2 answers:

8 0

Hey there :)

45 - n = 15

Here are few examples:
· The difference between 45 and a number gives 15. What is the number?
· A number less than 45 gives 15. What is the number?
· 45 decreased by a number gives the difference 15. What is the number?
· 15 papers were left unused out of 45 papers. How many papers were used?
· Ray had $45 and he bought some grocery. He was given a change of $15. How much money did he use?

Archy [21]4 years ago

6 0

There were 45 birds on the field , when some of them flew away, only 15 left.
How many birds flew away?

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What are the first three terms of the sequence defined by the recursive function an = an-1-(an-2-4), when a5 =-2 and a6 = 0?

Wittaler [7]

Answer:

6, 10 and 8

Step-by-step explanation:

Given the recursive function an = an-1-(an-2 - 4), when a5 =-2 and a6 = 0?

a6 = a5 - (a4 - 4)

0 = -2 - (14 - 4)

2 = - (a4 - 4)

-2 = a4 - 4

a4 = -2 + 4

a4 = 2

a5 = a4 - (a3 - 4)

-2 = 2 - (a3 - 4)

-2-2 = - (a3 - 4)

-4 = -(a3 - 4)

4 = a3 - 4

a3 = 4+4

a3 = 8

Also

a4 = a3 - (a2 - 4)

2 = 8 - (a2 - 4)

2-8 = - (a2 - 4)

-6 = -(a2 - 4)

6 = a2 - 4

a2 = 6+4

a2 = 10

a3 = a2 - (a1 - 4)

8 = 10 - (a1 - 4)

8-10 = - (a1 - 4)

-2 = -(a1 - 4)

2 = a1 - 4

a1 = 2+4

a1 = 6

Hence the first 3 terms are 6, 10 and 8

6 0

3 years ago

Read 2 more answers

Can someone help me with this problem (5 + x) + 0 = 5 + x

professor190 [17]

Answer:

0=0 or x=0 or x=x

Step-by-step explanation:

4 0

3 years ago

Read 2 more answers

A store is holding a sale during which all items will be sold at 30% less than their marked prices. How much will a rug marked $

IceJOKER [234]

Answer:

Cost of rug during sale = $140

Step-by-step explanation:

Given

Marked price of rug in a store = $200

The store is holding a sale and offering a flat 30% less on marked price on all items

This means the sale price of all items would decrease by 30%

We can calculate the discount offered by taking out percentage discount of the marked price.

Discount offered on rug = 30% of Marked price $=0.30\times200=\$60$

The discount is then subtracted from the marked price to get the price of rug during sale.

∴ Price of rug during sale = Marked price - Discount $=\$200-\$60 =\$140$

6 0

3 years ago

State one form of the Law of Cosines and provide a trick for writing the other two forms and explain when Law of Cosines should

Yuki888 [10]

Solving for Angles

$\displaystyle \frac{a^2 + b^2 - c^2}{2ab} = cos∠C \\ \frac{a^2 - b^2 + c^2}{2ac} = cos∠B \\ \frac{-a^2 + b^2 + c^2}{2bc} = cos∠A$

* Do not forget to use the inverse function towards the end, or elce you will throw your answer off!

Solving for Edges

$\displaystyle b^2 + a^2 - 2ba\:cos∠C = c^2 \\ c^2 + a^2 - 2ca\:cos∠B = b^2 \\ c^2 + b^2 - 2cb\:cos∠A = a^2$

You would use this law under two conditions:

One angle and two edges defined, while trying to solve for the third edge
ALL three edges defined

* Just make sure to use the inverse function towards the end, or elce you will throw your answer off!

_____________________________________________

Now, JUST IN CASE, you would use the Law of Sines under three conditions:

Two angles and one edge defined, while trying to solve for the second edge
One angle and two edges defined, while trying to solve for the second angle
ALL three angles defined [of which does not occur very often, but it all refers back to the first bullet]

* I HIGHLY suggest you keep note of all of this significant information. You will need it going into the future.

I am delighted to assist you at any time.

7 0

3 years ago

The table shows conversions of common units of length.

fgiga [73]

Answer:

0.50 miles

Step-by-step explanation:

We can use two unit converters to solve this problem.

1 mile = 1.61 kilometers, and
1000 meters = 1 kilometers

Thus, we can setup the ratio below and solve:

$800 Meter*\frac{1Kilometer}{1000Meter}*\frac{1Mile}{1.61Kilometer}\\=\frac{800*1*1}{1000*1.61}Mile\\=\frac{800}{1610}Mile\\=0.497Mile$

Rounding to 2 decimal places, 800 meters = 0.50 miles.

8 0

4 years ago

Read 2 more answers