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3 years ago

What is the simplified form of this expression?

Mathematics

1 answer:

Alexxx [7]3 years ago

5 0

Answer:

Option 4

Step-by-step explanation:

=> $-3x^2+2x-4 + 4x^2+5x+9$

Combining like terms

=> $-3x^2+4x^2+2x+5x-4+9$

=> $x^2+7x+5$

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Does 3 (x-1) = 2x + 9 have one solution, no solution, or infinite solutions?

Allushta [10]

Answer:

one solution

x = 12

Step-by-step explanation:

3 (x-1) = 2x + 9

3x - 3 = 2x + 9

subtract 2x from each side of the equation:

x - 3 = 9

add 3 to each side:

x = 12

3 0

3 years ago

Read 2 more answers

Please answer quick, will give brainliest!!

jonny [76]

Answer:

can u write the question

Step-by-step explanation:

pls the I will answer it

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2 years ago

Consider the function represented by 9x+3y= 12 with x as the independent variable. How can this function be written using

Ivenika [448]

Answer:

f(x)=-3x+4

(can't see some of your choices)

Step-by-step explanation:

We want x to be independent means we want to write it so when we plug in numbers we can just choose what we want to plug in for x but y's value will depend on our choosing of x.

So we need to solve for y.

9x+3y=12

Subtract 9x on both sides

3y=-9x+12

Divide both sides by 3:

y=-3x+4

Replace y with f(x).

f(x)=-3x+4

6 0

3 years ago

A student receives test scores of 62, 83, and 91. This student's term project score is 88. Each test is worth 20% of the final g

miskamm [114]

Answer:

The student's current average score will be 69.2

Step-by-step explanation:

Let first test be TEST A: which is 20 of total and secures 62

Let second test be TEST B: which is 20 of the total marks and has secured 83.

Let third test be TEST C: which is 20 of total and has secured 91.

And now the TEST D which is 25 of total and has secured 88.

Therefore, by multipying across

${0.2}\times{62}$ = 12.4

${0.2}\times{83}$ = 16.6

${0.2}\times{91}$ = 18.2

${0.25}\times{88}$ =22

Now, by adding the scores to get the average score

We get, 69.2.

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3 years ago

A skateboard is originally priced at $130. The online retailer gives a discount and the skateboard is now priced at $78. Enter t

Zinaida [17]

Answer:40%

Step-by-step explanation:

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3 years ago