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3 years ago

Please help I will give out brainliest

Mathematics

1 answer:

Licemer1 [7]3 years ago

6 0

Answer:

Step-by-step explanation:

Our function is : 3x²-3x-1

3x²-3x+2=2
3x²-3x-1+3=2
3x²-3x-1= -1
the number that gives us -1 is 1 (from the graph)

so x is 1

3x²-3x-1= x+1 ⇒3x²-4x-2 = 0
Δ(the dicriminant)= (-4)²-4*3*(-2)= 16+24 =40
two solution x and y
x= (4-√40)/6 and y= (4+√40)/6
x= -0.38 and y = 1.7
so the estimations are -0.38 and 1.7

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2 years ago

What are the common factors for 88 and 24

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3 years ago

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luis wants to buy a skateboard that usually sells for $79.99. all merchandise is discounted by 12%. what is the total cost of th

aivan3 [116]

ANSWER:

The total cost of the skate board is $74.61.

SOLUTION:

Given, Luis wants to buy a skateboard that usually sells for $79.99. all merchandise is discounted by 12%. luis has to pay a state sales tax of 6.75%.

We need to find what is the total cost of the skateboard.

Final cost is nothing but original amount subtracted by discount and added with tax.

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Discount = 12% of original cost

$\begin{array}{l}{=12 \% \times 79.99} \\\\ {=\frac{12}{100} \times 79.99} \\\\ {=\frac{959.88}{100}} \\\\ {=9.5988}\end{array}$

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$\begin{array}{l}{=6 \% \times \text { (original cost - discount) }} \\\\ {=\frac{6}{100} \times(79.99-9.6)} \\\\ {=\frac{6}{100} \times(70.39)} \\\\ {=\frac{422.34}{100}} \\\\ {=4.2234}\end{array}$

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