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4 years ago

If f(x)=2x^2 +3x what is f(9)

Mathematics

1 answer:

Semmy [17]4 years ago

4 0

Answer:

f(9) = 189

Step-by-step explanation:

Plug 9 into x

f(9) = 2(9)^2 + 3(9)

f(9) = 2(81) + 27

f(9) = 162 + 27

Thus, f(9) = 189

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Solve and check: 3 x2 + 5x + 6 + x − 1 x + 2 = 7 x + 3

vagabundo [1.1K]

Answer:

3 $x^{2}$ -2x +5=0

Step-by-step explanation:

Combine liked terms:

3 $x^{2}$ +5x+x-1x+6+2=7x+3

3 $x^{2}$ +6x-1x+8=7x+3

3 $x^{2}$ +5x+8=7x+3

Subtract 3: 3 $x^{2}$ +5x+8-3=7x+3-3

3 $x^{2}$ +5x+5=7x

Now subtract 7x:

3 $x^{2}$ +5x+5-7x=7x-7x

If you want combine liked terms:

3 $x^{2}$ -7x+5x+5=0

3 $x^{2}$ -2x+5=0

Hope this helps!

5 0

3 years ago

Solve -5t = 60 65 -6 6 55

defon

When you are asked to solve an equation, you need to isolate the variable which is t in this case. To isolate t, you would divide both sides by -5 and be left with t=-6 which is the final answer.

I hope this helps.

8 0

3 years ago

2 ft 6 ft 14 ft Volume =

sleet_krkn [62]

Answer:

volume of given figure is

$168feet {}^{3}$

Step-by-step explanation:

volume = product of all dimensions

v = 2 × 6 × 14
v = 168 cubic feet

4 0

3 years ago

Read 2 more answers

I need help ASAP!!!!!

kupik [55]

Answer:

y = 50

Step-by-step explanation:

Firstly, let's make an equation. We know that when y is 15, x is 3. Or, in other words, y is 5 times what x is. Therefore we can use the equation, y = 5x.

Now, just plug x into the equation.

y = 5(10)

y = 50

5 0

3 years ago

Read 2 more answers

A souvenir maker wants to create a scale model of the Empire State Building. The Empire State Building is 1,472 feet tall and ha

Elan Coil [88]

It looks like this $1472x=6=\ \textgreater \ 6/1476=scale=.004076$ . So the answer is A) 1.2 in. by 1.2 in.

7 0

3 years ago