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IgorC [24]
3 years ago
7

Help me with these three please

Mathematics
1 answer:
Tomtit [17]3 years ago
5 0

Answer:

1. 2x +19

2. -x -4

3. 6x + 30

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The bill at the end of a meal was £20.40 .10% was added as a service charge how much wad added
Dmitrij [34]

Answer:

$2.04

Step-by-step explanation:

The bill at the end of a meal was £20.40

10% was added

service charge was added = $(20.40 x 10/100)             [x%=x/100]

                                             =$2.04

7 0
3 years ago
Read 2 more answers
What is 3/4 and 7 3/4 in decimal form?
e-lub [12.9K]

To find the decimal form of  a fraction

You must divide the top number by the bottom number

3/4= 0.75

7 3/4 = 31/4 = 7.75


I hope that's help:0

3 0
3 years ago
Read 2 more answers
1/10 b= 70 what is b i am really stuck any help?
motikmotik

Answer:

B=700

Step-by-step explanation:

do 1/10 then you will get .1B=70 then just divide .1 from both sides to get B=700

6 0
3 years ago
Read 2 more answers
Annalise makes rectangular patchwork quilts out of leftover fabric scraps. The first scrap she is using to make a quilt has a wi
tekilochka [14]

Answer:

Area = f(x)=10x^2 + 31x + 15

Step-by-step explanation:

The function is the area function of a rectangle.

Area of Rectangle = Length * Width

Length of fabric scrap = 5x

Length of rectangular patchwork will be 5x + 3

and

Width of fabric scrap = 2x

Width of rectangular patchwork will be 2x + 5

THus, Area = (5x+3)(2x+5) square feet.

Let's expand:

Area = f(x) = (5x+3)(2x+5)\\f(x)=10x^2 + 25x + 6x + 15\\f(x)=10x^2 + 31x + 15

3 0
3 years ago
Given the following formula,A school needs to buy new notebook and desktop computers for its computer lab. The notebook computer
katrin2010 [14]

The cost to buy 18 notebooks and 12 desktop computers will be $8100.

The cost to buy n notebooks and d desktop computers will be 300n + 225d

<h3>What is the cost of a given material?</h3>

The cost of a given material is the amount attached and to be paid for getting that material.

From the given information:

  • The cost of notebook computers = $300
  • The cost of desktop computers is $225 each

The cost to buy 18 notebooks and 12 desktop computers will be:

= 300(18) + 225(12)

= 5400 + 2700

= $8100

The cost to buy n notebooks and d desktop computers will be:

= 300(n) + 225(d)

= 300n + 225d

Learn more about determining the cost of material here:

brainly.com/question/21720717

#SPJ1

8 0
3 years ago
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