Write each expression in standard form .<br> <br> -3(1-8m-2n)<br> 5-7(-4q+5)<br> -(2h-9)-4h

A phone company charges 50 cents per minute during the daytime and 10 cents per minute at night.

Gala2k [10]

Answer:

You could talk on the phone for 200 minutes at night, or 40 minutes during the day.

For every 5 minutes you reduced your night time talking, you could talk during the day for 1 minute.

Step-by-step explanation:

0.50d + 0.10n < $20

0.50d < $20 --> d < 40 minutes

0.10n < $20 --> n < 200 minutes

4 0

3 years ago

Which expression represents the length of the spring after Gerard removes some weight? Gerard adds weight to the end of the hang

Andreyy89

Answer: p+(-q)

Step-by-step explanation:

4 0

2 years ago

Probability With a Pair of Dice: Find the probability of rolling the difference of 1.

ra1l [238]

Answer:

there are 10 possibilities out of 36, which is 27.8%, or a chance of 1 in 3.6

Step-by-step explanation:

5 0

3 years ago

For the function f(x)=x2-4, fins the value of f(x) when x=6

garri49 [273]

$f(x)=x^2-4\\f(6)=6^2-4\\f(6)=32$

OR

$f(x)=x*2-4\\f(6)=6*2-4\\f(6)=8$

P.S. Hello from Russia

7 0

3 years ago

Read 2 more answers

The school librarian, Mr. Marker, knows the library has 1,400 books but wants to reorganize how the books are displayed on the s

kipiarov [429]

Answer:

200 resource books

800 fiction books

400 nonfiction books

Step-by-step explanation:

Let's define x as the amount of resource books that are in the library. As he has four times as many fiction books as resource books, that means he has 4*x fiction books.

We also know he has half as many nonfiction books as fiction books, that is 1/2*4*x = 2*x nonfiction books.

We just need to find out the value of x.

We know there are 1,400 books in total and there are just 3 types of books. Therefore, if we sum all of them, we get the 1,400.

Written in math language, that is

x + 4x + 2x = 1,400

7x = 1,400

We divide by 7 on both sides and we get

7/7x = 1,400/7

x = 200

Now we replace the x with 200 to know how many books he has of each type:

Resource books = x = 200

Fiction books = 4*x = 4*200 = 800

Nonfiction books = 2*x = 2*200 = 400

Therefore, there are 200 resource books, 800 fiction books and 400 nonfiction books in the library.

The tape diagram is attached as an image.

8 0

3 years ago

Write each expression in standard form . -3(1-8m-2n) 5-7(-4q+5) -(2h-9)-4h