If f(x) = -x2 + 6x, what is f(-3)?

Mathematics

1 answer:

Sever21 [200]3 years ago

8 0

Answer:

-12

Step-by-step explanation:

f(-3)= -(-3)2 + 6(-3)

= -(-6) -18

= 6 - 18

= - 12

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Find the equation of the circle that satisfies the given conditions. Radius 2 and center (4, -7)?

podryga [215]

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6 0

3 years ago

F(x)=x^2+10x-12

weqwewe [10]

Answer:

Therefore the two values required are 2.08 and -11.08.

Step-by-step explanation:

i) f(x) = $x^{2}$ + 10x - 12 is a quadratic equation and a quadratic equation will have two roots whose values when substituted in to the given quadratic equation will give the value.

ii) The question is therefore essentially asking us to find the roots of the given quadratic equation.

This can be done by equating the given quadratic equation to zero and then solving the equation for its roots.

∴ $x^{2}$ + 10x -12 = 0 ⇒ x = (-10 ± $\sqrt{10^{2} +(48)}$ ) ÷ 2

= (-10 ± 12.166)÷2 = 2.08, -11.08

Therefore the two values required are 2.08 and -11.08

3 0

3 years ago

Kristen can lift 133% of what Jane can lift. How many times more is that?

lubasha [3.4K]

The weight Kristen can lift is 1.3 times more than Jane's

<h3>How to determine the number of times?</h3>

The given paramater can be represented using the following equation

Kristen = 133% * Jane

Express the percentage as decimal

Kristen = 1.33 * Jane

Hence, the weight Kristen can lift is 1.3 times more than Jane's