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3 years ago

Find the sum of 9a+3b-5

Mathematics

1 answer:

meriva3 years ago

8 0

Answer:

its just 9a+3b-5 because they arent the same.

you cant do a+b-5

Step-by-step explanation:

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Please help with this i’ll give brainliest

cricket20 [7]

Answer:

Answer to part A:

1 notebook = $2.5

1 pen = $1.5

Answer to part B:

= 3 pens.

Step-by-step explanation:

Here's the simultaneous equation.

4n + 3p = $14.50

5n + 6p = $21.50

Multiply the numerator by the denominators first number and vice-versa.

5(4n + 3p) = $14.50

4(5n + 6p) =$ 21.50

Here's what you should get.

20n + 15p = $72.50

20n + 24p = $86

Eliminate the like numbers by subtracting the denominator from the numerator.

20n - 20n = 0

15p - 24p = -9p

$72.50 - $86 = -$13.5

Divide the result after the equal sign by the result before the equal sign.

-$13.5 ÷ -9 = $1.5p

Since we've found the cost of one pen as $1.5, lets substitute any of the first equations to get the cost of one notebook.

4n + 3p = $14.50

4n + 3($1.5) = $14.50

4n + $4.5 = $14.50

4n = $14.50 - $4.5

4n = $10.00

n = $2.5

Here's the answer to part A:

1 notebook = $2.5

1 pen = $1.5

Part B::::::::::::::::::

1 ($1.5) = 3($2.5)

$1.5 + $7.5 = $9.0

$27 ÷ 9 = $3

Therefore, she'll buy each supply thrice:

3 ( $1.5 + $7.5 ) = 3 ( $9.0 )

( $4.5 + $22.5 ) = ( $27 )

$4.5 + $22.5 = $27

Answer to part B:

= 3 pens.

3 0

2 years ago

Under his cell phone plan, Owen pays a flat cost of $67.50 per month and $4 per gigabyte. He wants to keep his bill at $71.90 pe

Dmitry [639]

Answer:

1 gig im preety sure i might be wrong

Step-by-step explanation:

6 0

3 years ago

5. Joe and Mike went video game shopping and it cost $69.00. Mike had a

Liula [17]

Answer:

it would be 20 I'm not 100 percent tho

8 0

3 years ago

Stephen & Richard share a lottery win of £2950 in the ratio 2 : 3. Stephen then shares his part between himself, his wife &a

horsena [70]

Answer:

Stephen's wife got £354 more than his son.

Step-by-step explanation:

Given:

Amount of Lottery = £2950

Now Given:

Stephen & Richard share a lottery amount in the ratio 2 : 3

Let the common factor between them be 'x'.

So we can say that;

$2x+3x=2950\\\\5x = 2950$

Dividing both side by 5 we get;

$\frac{5x}{5}=\frac{2950}{5}\\\\x = 590$

So we can say that;

Stephen share would be = $2x =2\times 590 = \£1180$

Now Given:

Stephen then shares his part between himself, his wife & their son in the ratio 3 : 5 : 2.

Let the common factor between them be 'y'.

So we can say that;

$3y+5y+2y=1180\\\\10y=1180$

Dividing both side by 10 we get;

$\frac{10y}{10}=\frac{1180}{10}\\\\y=118$

So Stephen's wife share = $5y = 5\times 118= \£590$

And Stephen's son share = $2y=2\times118 =\£236$

Now we need to find how much more her wife got then her son.

To find how much more her wife got than her son we will subtract Stephen's son share from Stephen's wife share.

framing in equation form we get;

Amount more her wife got than her son = $590-236 = \£354$

Hence Stephen's wife got £354 more than his son.

3 0

3 years ago

PLZZZZ SOMEONE ANSWER I WOULD APPRECIATE IT A LOT!!!!! PLZZZZ.

Jet001 [13]

Answer:

Angle B: 26 degrees

Angle C: 26 degrees

Angle BSD: 97 degrees

Angle CSE: 97 degrees

Angle E: 57 degrees

Arc BC: 114 degrees

Step-by-step explanation:

Good luck boi

8 0

3 years ago

Find the sum of 9a+3b-5​

Find the sum of 9a+3b-5