3 years ago

30 points helppppppppppppppp plzzzzzzzzzz

Mathematics

1 answer:

ale4655 [162]3 years ago

5 0

Answer:

184

Step-by-step explanation:

f(-9) = 3(-9)^2 + 5(-9) - 14

= 3*81 - 45 - 14

= 184

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Activity 3

skad [1K]

Answer:

19 Lollipops per friend

Step-by-step explanation:

$60-3=57\\\\57/3=19$

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2 years ago

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If (4,5) is on the graph of a function what is the equation

Artist 52 [7]

Answer:

4 × 5 = 20

Step-by-step explanation:

Imagine this: the X is 4 and the Y is 5.

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4 × 5 = 20

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3 years ago

The weight of an elephant is 103 times the weight of a cat. If the elephant weighs 14,000 pounds, how many pounds does the cat w

professor190 [17]

Answer:

135.92 lbs that's a big cat

Step-by-step explanation:

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3 years ago

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GrogVix [38]

Answer:

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3 years ago

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Solve using the quadratic formula. Show all work. Write each solution in simplest form. No decimals.

lawyer [7]

Given:

The quadratic equation is:

$12a^2+9a+7=0$

To find:

The solution of the given equation in simplest form by using the quadratic formula.

Solution:

If a quadratic equation is $ax^2+bx+c=0$ , then the quadratic formula is:

$x=\dfrac{-b\pm \sqrt{b^2-4ac}}{2a}$

We have,

$12a^2+9a+7=0$

Here, $a=12,b=9,c=7$ . Using the quadratic formula, we get

$x=\dfrac{-(9)\pm \sqrt{(9)^2-4(12)(7)}}{2(12)}$

$x=\dfrac{-9\pm \sqrt{81-336}}{24}$

$x=\dfrac{-9\pm \sqrt{-255}}{24}$

$x=\dfrac{-9\pm i\sqrt{255}}{24}$ $[\because \sqrt{-a}=i\sqrt{a}]$

The solutions of the given equations are $x=\dfrac{-9-i\sqrt{255}}{24}$ and $x=\dfrac{-9+i\sqrt{255}}{24}$ .

Therefore, the correct option is B.

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3 years ago