What are the important things an 8th grader needs to know about math?

Mathematics

2 answers:

gogolik [260]3 years ago

7 0

Always foucus on the teacher ask help when needed

tatuchka [14]3 years ago

5 0

Be prepared for lots of work and listen it will make math so much easier also ask questions from your teacher he or she is there for a reason. Practice practice practice!!!

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soldi70 [24.7K]

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3 years ago

If f(x)= 3x2- 2x + 3 then find what f(3) is equal to

Anettt [7]

Answer:

Answer is 24

Step-by-step explanation:

$given \: f(x) = 3 {x}^{2} - 2x + 3 \\ to \: find \: f(3) \ : \: ? \\ f(3) = 3( {3}^{2} ) - 2(3) + 3 \\ = 3(9) - 6 +3 \\ = 27 - 3 \\ = 24$

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THANKS FOR GIVING ME THE OPPORTUNITY TO ANSWER YOUR QUESTION.

5 0

3 years ago

Read 2 more answers

A convex parabola is shown in a coordinate plane. The parabola connects the points left-parenthesis negative 4.5 comma 12 right-

spayn [35]

Since the parabola is connecting the points, it means that the points given are on the parabola or that the points are solutions of the parabola. Thus, when we substitute the points into the function, we should end up with the correct y-value.

To find the correct choice, let's test a point. An easy point to test I believe would be (-3, 0) because we should be getting 0 as a y-value. Let's test:

$A. (- 3 - 3)(3 + 4) = -42$

$B. (-3 + 3)(-3 - 4) = 0$

$C. (-3 + 2)(-3 - 4) = 7$

$D. (-3)(-3 + 12) = -27$

We can see that Choice B is the correct function, because it produces 0 when we substitute $x = - 3$ . Thus, Choice B, or (x + 3)(x - 4) is the answer.