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3 years ago

7. Determine the type and number of solutions of -4x2 – 3x+7= 0

Mathematics

1 answer:

Tasya [4]3 years ago

8 0

Two real solutions: plug into quadratic formula and X= -1 or 1.75

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What is a number that when you multiply it by 9 and then add

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Answer:

equation: 9x+6=60

solution: 6

Step-by-step explanation:

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PLSS PLSS HELP ME I REALLY DONT UNDERSTAND THIS

atroni [7]

The answer is probably B = 45°

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3 years ago

The product of 3 consecutive odd numbers is 3,315. Enter a simplified expression for finding the numbers. Let n be the first odd

grin007 [14]

Answer:

$n^3+6n^2+8n=3315$

Step-by-step explanation:

Let n be the first odd number.

The 2nd consecutive odd number would be $n+2$ and 3rd consecutive odd number would be $n+2+2=n+4$ .

We have been given that the product of 3 consecutive odd numbers is 3,315. The product of 3 consecutive odd numbers would be $n(n+2)(n+4)$ .

Now we will equate the product with 3315 as:

$n(n+2)(n+4)=3315$

Let us simplify the left side of equation.

$(n\cdot n+n\cdot 2)(n+4)=3315$

$(n^2+2n)(n+4)=3315$

Now, we will apply FOIL to find the product of left side as:

$n^2\cdot n+n^2\cdot 4+2n\cdot n+2n\cdot4=3315$

$n^3+4n^2+2n^2+8n=3315$

$n^3+6n^2+8n=3315$

Therefore, our required equation would be $n^3+6n^2+8n=3315$ .

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4 years ago

A bag contains 8 black marbles and 20 yellow marbles. You reach into the bag and pull out a black marble. Then you reach into th

sveticcg [70]

You have a bag containing 8 + 20 = 28 marbles.

After you pull a black marble you have 28 - 1 = 27 remaining marbles.

There are 20 yellow marbles in the bag.

The probability of pulling a yellow marble is now

$\frac{20}{27} which \: is \: approximately \: equal \: to \\ 74.07\%$

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3 years ago

Write 6324 correct to the nearest thousand?

dalvyx [7]

Answer:

6000

6 is in the thousands place, since 3 is less than five, you round down.

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