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Julli [10]
4 years ago
15

What is 90.69 rounded to the nearest tenth

Mathematics
2 answers:
kolezko [41]4 years ago
8 0
90.69 rounded to the nearest tenth.
Go to the tenth value of the number and look to the number right of that. If it is 5 or higher, you round up; 4 or less, round down
9 is higher than 5 therefore you round up
90.69 becomes 90.7
sergey [27]4 years ago
8 0

90.7 because anything above five you round up
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Please explain who would i be able to get the answer to this problem.
SashulF [63]

We have been an quadratic equation 8k-k^{2} =42 and we are asked to solve our equation.

Upon subtracting 42 from both sides of our equation we will get,

8k-k^{2}-42 =0

-k^{2}+8k-42 =0

k^{2}-8k+42 =0

Let us check whether our quadratic equation has any real roots using discriminant formula.

D=b^{2}-4ac  

Upon substituting our given values in discriminant formula we will get,

D=(-8)^{2} -4(1\cdot 42)

D=64 -168

D=-104

We can see that D is less than zero, so our quadratic equation has no real roots.

Now we will use imaginary number i to find complex roots of our quadratic equation.

We will use -1 =i^{2} to solve our equation.

k=\frac{-b \pm \sqrt{b^{2}-4ac} } {2a}

k=\frac{--8 \pm \sqrt{(-8)^{2}-4(1*42)} } {2*1}

k=\frac{8 \pm \sqrt{64-168 }} {2}

k=\frac{8 \pm \sqrt{-1\cdot 104} } {2}

k=\frac{8 \pm \sqrt{i^{2}\cdot 104} } {2}

k=\frac{8\pm 2i \sqrt{26}}{2}

k=4\pm i \sqrt{26}

Therefore, our answer will be k=4\pm i \sqrt{26}.


3 0
3 years ago
A company ordered 10 boxed lunches from a deli for $74.50.each boxed lunch cost the same amount.which equation represents the pr
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C.

Step-by-step explanation:

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3 0
3 years ago
I need help on this math problem ASAP.
Luda [366]

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Step-by-step explanation:

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3 years ago
Which values represent the first two terms of the sequence a1=2 and an=-2(an-1)^2?
Mars2501 [29]
Hello,

a_{1}=2
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a_{1}=2
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Answer C






3 0
3 years ago
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