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andrey2020 [161]
4 years ago
10

Dexter plans to spend totally 8 hours on preparing

Mathematics
1 answer:
Alex73 [517]4 years ago
6 0

Answer:

2 hours

Step-by-step explanation:

Let the total time allotted for English be x

Hence the total time for Biology studies = 2x

Time allotted for Math = 3.5

Rest time = 30 min + 30 min +30 min = 90 min = 1.5 hrs

Total time for studies = x+2x+3.5+1.5 which is given as 8 hours

Thus

x+2x+3.5+1.5 =8

3x+5=8

3x=3

x=1

Hence time on English = 1 hours

Time for biology = 1 x 2 = 2 hours

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Knowing the squareroot of 81 is 9, we can easily know that square root of 83 is close to 9.

9 to the closest tenth is 10.

Hope I helped :)
8 0
4 years ago
55<br> +30<br> +15<br> --------<br> 90<br><br> What is 90 minutes after 2:25
Juli2301 [7.4K]
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3 years ago
A school held a special math event for parents. On the first night, 150 parents attended, which was 40% below the expected atten
Serga [27]

Answer:

10.429% exceed

Step-by-step explanation:

expected:

150x [100+40]/100=210 parents were expected on first night

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4 0
3 years ago
Bonnie deposits $70.00 into a new savings account.
serg [7]

Answer:

B. $79.45

Step-by-step explanation:

The equation for simple interest is I = PRT, where I = interest earned, P = principal/amount invested, R = rate as a decimal, and T = time in years.

For this example, we'll calculate the interest earned, then add to the principal to get the total amount of money in her account.

I = (70)(0.045)(3)

I = 9.45

70 + 9.45 = $79.45

Please let me know if you have questions.

4 0
3 years ago
A circle has a radius of 18 and a center at (10,-9). Find the equation of the circle.
gulaghasi [49]

Answer:

(x-10)²+(y+9)²= 324.

Step-by-step explanation:

For this question, you will need to substitute these values into the equation of a circle:

(x-h)²+(y-k)²= r²

'h and k' represent the center points, and 'r' represents the radius.

This will result in:

(x-10)²+(y+9)²=324.

4 0
3 years ago
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