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Airida [17]
3 years ago
14

(7+√5)√5-(7+√5)7 how to solve this question​

Mathematics
1 answer:
SSSSS [86.1K]3 years ago
3 0

Answer:

-44

Step-by-step explanation:

<u><em>Using distribute property of multiplication</em></u>

=> 7\sqrt{5} + (\sqrt{5} )^2-49-7\sqrt{5}

(7\sqrt{5} will be cancelled with each other)

=> 5 - 49

=> -44

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The function y=60+25sin(pi/6)t, where t is in months and t=0 corresponds to April 15, models the average high temperature in deg
BartSMP [9]

Answer:

The maximum temperature will be of 85 degrees, on July 15.

Step-by-step explanation:

Sine function:

The sine function oscilates between -1 and 1, and it's maximum value is:

\sin{(\frac{\pi}{2})} = 1

y=60+25sin(pi/6)t

The maximum value will occur when \sin{(\frac{\pi t}{6}}) = 1, and it will be of 60 + 25 = 85 degrees.

When will it occur?

First we find the value of t for which the value inside the function sine is \frac{\pi}{2}. So

\frac{\pi t}{6} = \frac{\pi}{2}

\frac{t}{6} = \frac{1}{2}

2t = 6

t = \frac{6}{2} = 3

That is the number of months after April 15, which is 3 months. So July 15.

8 0
3 years ago
2/3 is what percent of 1/4
asambeis [7]

Answer:

267%

Step-by-step explanation:

you need to divide the second number by the first. This will give you the percentage.

2/3 ÷ 1/4 = 8/3 = 2.67 = 267%

6 0
3 years ago
The number of students at jefferson school is even. The number has three digits. The digit in the ten place is 4. write there nu
Burka [1]
Let's assign three blanks for each digit of the unknown number. But let's fill in the tens digit because it is already specified.

_ 4 _

The last digit should be even to make it even. The possible digits for this are 2, 4, 6, and 8. The first digit could be any digit from 1 to 9. Therefore, the possible answers are 

142  242  342  442  542  642  742  842  942
144  244  344  444  544  644  744  844  944
146  246  346  446  546  646  746  846  946
148  248  348  448  548  648  748  848  948

Therefore, there are a total of 36 possible answers.

5 0
3 years ago
A elevation starting at 11,049 feet. After 6 hours the elevation is 7,569 feet. What's the rate of change in feet per hour.
bezimeni [28]
The change is 580 feet per hour.

11049 - 7569 is 3480.

Then 3480 ÷ 6 is 580.
8 0
4 years ago
5/12 - 2/5 in fraction form
fgiga [73]
5/12-2/5=25/60-24/60
1/60

the answer is 1/60

3 0
3 years ago
Read 2 more answers
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