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Rina8888 [55]
2 years ago
7

Please answer correctly !!!!!!!!! Will mark brainliest !!!!!!!!!!!!!!!

Mathematics
1 answer:
Ugo [173]2 years ago
4 0

Answer:

Step 3  they took the square root incorrectly

Step-by-step explanation:

5 ( x-2)^2 +6 = 86

Subtract 6 from each side

5 ( x-2)^2 +6 -6= 86-6

5 ( x-2)^2  = 80

Divide each side by 5

5 ( x-2)^2  /5 = 80/5

(x-2)^2 = 16

Take the square root of each side

sqrt((x-2)^2)  = ±sqrt(16)

x-2 = ±4

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Step-by-step explanation:

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3 years ago
If s waves travel at 5 km/s how long do they take to travel 100 km
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MariettaO [177]
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7 0
3 years ago
What is 70 X 12 1/2?
gulaghasi [49]

Answer:

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Step-by-step explanation:

Step 1.) When you multiply fractions, you put whole numbers over one.

Step 2.) Then, you change whole numbers with fractions, to improper fractions.

Step 1.)

70/1 x 12 1/2

Step 2.)

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*This is the Right Way of doing these problems*

4 0
3 years ago
Read 2 more answers
A two-person relay race consists of eight times around a football field. Juan runs four and one-sixth times and Antonio runs thr
Serga [27]

Answer:

A


Step-by-step explanation:


To convert mixed number as improper fractions, use this rule:

A\frac{B}C}=\frac{(A*C)+B}{C}


<u>For Juan:</u>  (4\frac{1}{6})

4\frac{1}{6}=\frac{(4*6)+1}{6}=\frac{25}{6}


<u>For Antonio:</u>  (3\frac{2}{3})

3\frac{2}{3}=\frac{(3*3)+2}{3}=\frac{11}{3}


Answer choice A is correct.


5 0
3 years ago
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