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3 years ago

Simplify the expression. 3x-9y-5x-7y

Mathematics

2 answers:

Norma-Jean [14]3 years ago

7 0

$3x - 9y - 5x - 7y =\ \textgreater \ \\ 

( 3x + - 5x ) +( - 9y + - 7y ) =
 \\ \\ = - 2x - 16y 
 \\ \\ 
Good Luck$

emmasim [6.3K]3 years ago

5 0

3x - 9y - 5x - 7y

Combine like terms

( 3x + - 5x ) + ( - 9y + - 7y )

= - 2x - 16y

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Joshua has $560. He wants to buy a laptop that costs $320 as well as a case for the laptop that costs $65 and is currently on sa

Igoryamba

Answer:$154.73

Step-by-step explanation:

Take 65 and multiple .15 and that will give you the 15% off of the case. When u do that you get 9.75 so then 65-9.75= 55.25 multiply .08 for the sales tax on the case = 4.42 add to 55.25= 59.67 then add the sales tax for the laptop 320 multiplied by .08 = 25. 60 for a total of 345.60 then add that to 59.67 = 405.27 then u have to subtract that from 560 and Josh has $154.73

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3 years ago

A two wheeler covers a distance of 55.3 km in one liter of petrol. How much distance will it cover in 10 liters of petrol?

djyliett [7]

Answer:

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Step-by-step explanation:

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2 years ago

Solve each expression.reduce to simplest form of 5/8x4/5

Butoxors [25]

5/8 * 4/5
= 1/8 * 4/1
= 1/4 * 2/1
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Final answer = 1/2

4 0

3 years ago

Read 2 more answers

The equation

ra1l [238]

<h2>Explanation:</h2>

Let's use a trial and improvement method to find this solution.

Step 1. Let's choose x = 8.5

Substituting into the equation:

$(8.5)^2+ 3(8.5) - 94=0? \\ \\ 72.25+25.5-94=0? \\ \\ 3.75\neq 0$

Step 2. Let's choose x = 8.4

Substituting into the equation:

$(8.4)^2+ 3(8.4) - 94=0? \\ \\ 70.56+25.2-94=0? \\ \\ 1.76\neq 0$

Step 3. Let's choose x = 8.3

Substituting into the equation:

$(8.3)^2+ 3(8.3) - 94=0? \\ \\ 68.89+24.9-94=0? \\ \\ -0.21\neq 0$

Since the sign of the equation changes from positive to negative when evaluating from 8.4 to 8.3, then x = 8.3 seems to be a reasonable value. Finally, the solution to 1 decimal place is:

$x=8.3$

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3 years ago

Sorry theres 3 more after this its all urgent

faust18 [17]

Answer:

Step-by-step explanation:

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3 years ago