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Murrr4er [49]
3 years ago
7

Are these right? If not can you please tell me how to do it!!

Mathematics
1 answer:
fenix001 [56]3 years ago
5 0
Yes it's good! Nice Job!
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HELLPPPPPPPPPPPPP Solve x2 - 16x + 60 = -12 by completing the steps. First, subtract 60 from each side of the equation. Next, ad
kompoz [17]

Answer:

x = 8 ± 2i\sqrt{2}

Step-by-step explanation:

Given

x² - 16x + 60 = - 12 ( subtract 60 from both sides )

x² - 16x = - 72

To complete the square

add ( half the coefficient of the x- term )² to both sides

x² + 2(- 8)x + 64 = - 72 + 64, thus

(x - 8)² = - 8 ( take the square root of both sides )

x - 8 = ± \sqrt{-8} = ± 2i\sqrt{2} ( add 8 to both sides )

x = 8 ± 2i\sqrt{2}

3 0
3 years ago
Read 2 more answers
Simplify √5(8+3√6) using radicals
hichkok12 [17]
Your answer should be 34
3 0
3 years ago
Multiple samples of students were asked four questions, with the sampling variability of their answers to question 4 being the h
iogann1982 [59]
The variability measures the closeness of the individual data provided. So, the most reliable sampling is the one with the lowest variability. 

For this case, the question with the lowest sampling variability is question 3. Therefore, we can conclude that the answers to which of the questions are most reliable is question 3. 
4 0
3 years ago
A triangle has side lengths of (7.8v+2.6)(7.8v+2.6) centimeters, (5.3v+4.5)(5.3v+4.5) centimeters, and (2.4w-6.7)(2.4w−6.7) cent
Citrus2011 [14]

Given:

A triangle has side lengths of (7.8v+2.6) centimeters, (5.3v+4.5) centimeters, and (2.4w-6.7) centimeters.

To find:

The expression which represents the perimeter, in centimeters, of the triangle.

Solution:

We know that

Perimeter of a triangle = Sum of length of all sides of the triangle

Perimeter=(7.8v+2.6)+(5.3v+4.5)+(2.4w-6.7)

Now, combine like terms.

Perimeter=(7.8v+5.3v)+(2.4w)+(2.6+4.5-6.7)

Perimeter=13.1v+2.4w+0.4

Therefore, the expression for perimeter, in centimeters, of the triangle is 13.1v+2.4w+0.4.

4 0
3 years ago
Tim earned $300 in five days. After the first day, he earned $10 more each day than the day before. How much did Tim earn on the
Vika [28.1K]
Use the equation 300⇒5x to find how much tim made each day on average. 
x⇒60   so, Day 1: $60, Day 2: $70 etc.. so the equation 300=5x+10 suffices the problem. 300⇒5x+10 ⇒    290=5x
x=58
So, Tim earned $58 his first day. Hope this helped.
8 0
3 years ago
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