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3 years ago

1. If f(x) = 3x² + x - 2, then f(-2) = 8 12 32 -16

Mathematics

2 answers:

leonid [27]3 years ago

8 0

The answer is A) 8 because x=-2

Vanyuwa [196]3 years ago

4 0

Answer: 8

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A bag contains 8 beads.

kolezko [41]

Answer:

5/8

Step-by-step explanation:

→ Work out how many red

8 - ( 2 + 1 + 2 ) = 3

→ Add up red and purple

3 + 2 = 5

→ Divide over total number of beads

5/8

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Answer:

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Step-by-step explanation:

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How do i solve this

MAXImum [283]

Answer:

x = 0, x = 3

Step-by-step explanation:

Given

- 4x² = - 12x ( add 12x to both sides )

- 4x² + 12x = 0 ← factor out - 4x from each term

- 4x(x - 3) = 0

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3 years ago

Solve. -7x+1-10x^2=0

telo118 [61]

Answer:

$-7x+1-10x^2=0$

$-10x^2-7x+1=0$

$quadratic\:equation:-$ $ax^2+bx+c=0$

$solutions:-\\\\x_{1,\:2}=\frac{-b\pm \sqrt{b^2-4ac}}{2a}$

$For \\A=-10\\B=-7\\C=1$

$x_{1,\:2}=\frac{-\left(-7\right)\pm \sqrt{\left(-7\right)^2-4\left(-10\right)\cdot \:1}}{2\left(-10\right)}$

$\sqrt{\left(-7\right)^2-4\left(-10\right)\cdot \:1}=\sqrt{89}$

$x_{1,\:2}=\frac{-\left(-7\right)\pm \sqrt{89}}{2\left(-10\right)}$

$x_1=\frac{-\left(-7\right)+\sqrt{89}}{2\left(-10\right)},\:x_2=\frac{-\left(-7\right)-\sqrt{89}}{2\left(-10\right)}$

$\frac{-\left(-7\right)+\sqrt{89}}{2\left(-10\right)}=-\frac{7+\sqrt{89}}{20}$

$\frac{-\left(-7\right)-\sqrt{89}}{2\left(-10\right)}=\frac{\sqrt{89}-7}{20}$

$x=\frac{\sqrt{89}-7}{20}$

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3 years ago

What is the approximate surface area of this right prism with triangular bases?

Sliva [168]

Answer: A

Step-by-step explanation: area = length * (a + b + c) + (2 * base_area) = length * base_perimeter + (2 * base_area)

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